DRF 17: Science and Practice of Low Carbohydrate, High Fat “Keto” Diets

(indistinct chattering) (uplifting music) – Good afternoon everyone,and welcome to Research Forum. Thank you for being here today. Today it is my pleasure tointroduce our two speakers, Dr. William Yancy and Dr. Eric Westman, who will be telling us a little bit today about the science and practice behind low carbohydrate, high fat keto diets, which I know is a great topic of interest, especially to those ofyou who work in prevention of cardiovascular diseaseand know the difficulties of managing obesity as a risk factor. Our first speaker todayis Dr. Eric Westman. Dr. Westman is an AssociateProfessor of Medicine and the Founder and Director of the Duke Lifestyle Medicine Clinic.He received his MD from theUniversity of Wisconsin-Madison and his Master’s degree inClinical Research from Duke. Dr. Westman has been at Duke since 1990 and has over a hundredpeer-reviewed publications, is a past president and Master Fellow of the Obesity Medicine Association and Fellow of the Obesity Society. He’s authored multiple books, including the New York Times best seller, The New Atkins for a New You, Cholesterol Clarity and Keto Clarity, and is a co-editor of the textbook, Obesity Evaluation andTreatment Essentials. And then after we hear from Dr. Westman, we’ll be hearing from Dr. William Yancy, who’s a General Internist andObesity Medicine Specialist and Associate Professorof Medicine here at Duke. Dr. Yancy received hisundergraduate degree from Duke and his medical degreefrom ECU before obtaining his Master’s in Health Sciences from Duke. He did his training in internal medicine and was chief resident atUniversity of Pittsburgh, and his primary role is Directorof the Duke University Diet and Fitness Center. Dr. Yancy is a fellowof the Obesity Society and a diplomat of the AmericanBoard of Obesity Medicine and has over 100 scientific publications and has led multiple clinical trials investigating the safety and effectiveness and tolerability of diets andmedications for weight loss.Please join me inwelcoming today’s speakers, Dr. William Yancy and Dr. Eric Westman. (audience clapping) – Thank you for that introduction and it’s a pleasure to be here. I feel like I’m cominghome to where I grew up. And I know you never can really go home, but we both went throughthe clinical research training program under a different name back in the early ’90s, andso this is back into the, at least the evidence-basedhome and clinical trial home.It’s great to be here. Now I also have had kids andhad them go through school, and so I’d like you all justto close your eyes a moment and raise your hand if you’re following a, wait, you have to close your eyes. (audience laughing) Close your eyes for a moment. Raise your hand ifyou’re doing a keto diet. Okay, I’m opening my eyes. Close your eyes, okay. So I can just tell youthat, oh, close your eyes. Or wait, lower your hand. (audience laughing) I can just tell you, you’re not alone but I can’t tell youa percentage of folks. But it’s great to see thatthere’s some headway being made even in a house that cardiology built because you need to know that this is okay for heart disease. Now before we get tothe science and practice of low carb, high fat keto diets, I need to just tell youthat there are lots of ways to lose weight. Obesity medicine actuallyinvolves not only lifestyle, which is what we’re gonna talk about in the lower left hand cornerhere, but also medications.There are four newFDA-approved medications that I don’t use in my clinic but other obesity medicine doctors can. You can do a very low-calorie diet, which Dr. Yancy has. I don’t use that myself. And then last but notleast, you can go have that down the street to, our surgical colleagueshave bariatric surgery. But in my mind, in my view,you would never have surgery before you tried lifestyle,lifestyle and medication, you try the barn shake programs,the very low-calorie diets. In our crazy world today, you can walk in and get the surgery without having tried any of those things. So just to show you inthe medical obesity world, we’re talking about risk and cost. In the lifestyle medicine world, we’re just talkingabout changing the food. It’s just changing the food. Just put that in context. This is from an obesity algorithm, obesityalgorithm.org or .com. You can download theseslides and become an expert in obesity medicine in a minute. Looking at the nutritional slide, there are low-calorie diets, which you could restrict fat as the method of lowering the calories, or you can restrict carbs as the method of lowering the calories.These are just different ways to do it. Not wrong, not one right or wrong. They both can work. And as you’re gonna see, we’regonna focus on the evidence behind the low carb diets. But it’s not the only way to do it. And then the very low-caloriediet on the far right is the program that Dr.Yancy has here at Duke. So when you get to the low carb diets, the science and thesimplified way to look at this says that the lower inthe carbohydrates you go for the whole day, theless carbohydrate you eat, the more your body hasto find fuel from fat.And so if you go to 50 gramsor 20 grams of carbohydrates for the whole day, your bodyhas to find a fuel source, and it looks too fatbecause generally as humans, we store fat as the fuel. And so you’re gonna startburning your own fat, you call this the ketone threshold, and now a keto diet. It’s all confused now because you can measure the breath ketones, you can measure the blood ketones, you can measure the urine ketones, and they don’t always go the same way. Well, we don’t measure ketones at all in our clinical program, wejust keep the carbs low enough so we know that you’re in ketosis. You don’t even have to measure them. How’s that for simplification, huh? So here are the other, thisis the other demonstration that if you go lower on the carbs, your appetite goes down and the keto diet or low carb ketogenic dietbecomes a low-calorie diet without even talking about calories.So there are good carbs,there are bad carbs. In general you canthink of the vegetables, non-starchy vegetables as the good carbs. I don’t know of any popular diet program that would really recommendthat you have Fritos or Cheetos or Dr. Armstrong, a couple Snickers bars? (audience chuckling) Yeah, so we’re talking about real food. That’s what we’re talking about. Dr. Yancy. – Good afternoon everybody. It’s a real pressure totalk with you all about this way of eating thatwe’ve been studying for almost 20 years nowand we’ve been using in clinical practicefor about 10 years now. And so I’ve been charged totalk to you about the evidence, primarily evidence from clinical trials, and so I’m gonna go througha number of clinical trials that we’ve done and that others have done and just try to give you an idea of what some of thehealth effects of these, this kind of eating can have. So before I start with the evidence, I do wanna kind of help you to understand what we’re talkingabout when we talk about a low carbohydrate or avery low carbohydrate diet, particularly these ketogenic diets.So I’m gonna go throughhow we teach our patients and our participantsin our clinical trials, first off, I just wannapoint out how simplified this approach is. So if you look at theseinstructions, they’re pretty simple, they fit on one page. Now there are some otherinstructions that we give patients, but essentially this is what we tell them. And we teach them how toreduce carbohydrate intake to less than 20 grams per day, okay? 20 grams is not magical. There are some people out there that say you’re not getting to 20 grams,you have to get to 20 grams.It’s just a startingpoint that we have noticed that most patients have success with if they start there and thenwe can add carbohydrates back into it, into theirdiet to a certain level where they can continue to have success. So 20 grams is reallyjust a starting point. If you follow these instructions, you don’t even have tocount the carbohydrates. You will be eating to a 20-gramper day carbohydrate diet. So pretty straightforward, notice that certainfoods are unrestricted. So meat and eggs are zero carbohydrates. So you can have unlimitedamounts of these foods. This is really helpful to patients who are trying to loseweight and might get hungry while they’re following a diet approach.So you don’t have tothink of this as a diet, a diet we think of as atransient thing that you do for a period of time just to lose weight. We think of this as anutritional approach, a lifestyle, a way of eating, and we don’t want them tothink of themselves being or feeling restricted. So they have foods theycan eat if they need to.There are some otherfoods on here, cheese, several cups of vegetables,salad vegetables or things like lettuce,spinach, collard greens, parsley, things like that. And then the one cup oflow carbohydrate vegetables are foods like asparagus,broccoli, cauliflower, cucumbers, mushrooms, tomatoes. So a wide variety of vegetables that are low in carbohydrate,and you can incorporate into your diet without goingover 20 grams per day, okay? Notice that I don’t call thisa no carbohydrate diet too. A lot of people will say that. I’m not a no carbohydrate dietor I’m not eating any carbs. These foods, after the meat and egg, these foods do have carbohydrate in them so it’s not a no carbohydrate diet. As I mentioned with theunrestricted amounts of meat and eggs, caloriesare not restricted. So this means that peoplecan eat when they’re hungry. Now the unique thing I’llshow you in a few minutes is that people end upself-restricting their calories. They’re not hungry on this diet approach. And so they don’t end upeating as much calories as they used to eat beforethey’re eating this way.And as I also mentioned earlier, carbohydrate intake is slowly increased as someone reaches their goal weight. And we teach people thatthere’s a certain level they need to stay belowin order to lose weight, and then there’s anotherlevel that’s higher than that, that they need to stay below in order to maintain their weight, okay? So one of the biggest pitfalls people run into is adding carbohydratesback into their diet too quickly or too much,and that’s when weight gain or weight regain occurs. Most of the studies have been done with people taking a multivitamin, and so we encourage people to do that. And then as I’ll show, thediet can be dehydrating, it causes a diuresisand so we encourage people to drink lots of water. And I’ll talk about thata little more later. So we call this a ketogenic diet, and I wanna talk a littlebit about ketones because as health professionals,we learn that ketones are harmful and dangerous. So we learn from Type 1diabetes that ketoacidosis is a hazardous condition, and it is; but that’s not exactlythe only role for ketones.So I wanna explain them. Ketones are simply moleculesthat deliver energy. So just think of them asyour backup fuel source. So if you were to reducecarbohydrate intake to a certain level, thenyou will need to find another fuel source andthat will be your fat, or the fat that you’re eating. And that fat that youhave, stores in your body, is broken down intofatty acids and ketones. And these ketones can beused to deliver energy to most of the tissues in your body.In fact, there are onlya few pretty energy- not-requiring tissues thatneed something besides ketones. So the erythrocytes, thecornea, the lens and the retina need glucose, and there’sample glucose left in your body to supply energy to those tissuesand all the other tissues, in particular, your brain, can survive and get energy from ketones. Now notice this table, thetable shows that ketones are in our bodies at any given moment. So those of you who justfinished eating your lunch, you still have ketones inyour body at a very low level, but you have some. This morning when you wokeup before you ate breakfast, you had them in a higher level. And then if you wereto go on the induction, the most strict phase of a low carb diet, then they would be at alittle bit higher level, at about one to threemillimoles per liter. Now it’s not until you fast for many days or in particular, go into ketoacidosis from not having insulin ifyou have Type 1 diabetes that you go into a derangementwhere the ketones are so high that they cause acidosis,and that is harmful for your tissues and your health.So this was obviously aconcern when we first started doing our research onthis nutritional approach, and so we actually wantedto look to see what happened to people following this diet, and we checked blood gaseson a lot of our patients. Yes, they did agree to haveme stick them in the wrists over and over again during a study, and we found out that theirpH never went below 7.37. That’s actually in the normal range. So we didn’t see acidosis occurwhile they were in ketosis. So let’s talk a little bit about the weight effects of these diets. This table shows someof the earlier studies, including ours, thatshowed a weight loss effect at six months and 12 months,depending on the study.And the kind of generalconsensus that came from these studies is thata low carbohydrate diet has a beneficial impacton your weight regardless, but it seems to have anadvantage over a low fat, low-calorie diet, particularly initially in the first six months or so. And you can see in bluehere that there’s greater weight loss, and that asteriskmeans there’s statistically greater weight loss at six months for those four studies, whereas when it stretchedout to about 12 months, the weight loss was not asclearly statistically different between the two approaches. There was still weight loss, so both diets were creating benefit, butthere wasn’t such a distinction between the two diets. So this is where a lotof people will say well, low carbohydrate diet is betterfor weight loss initially, but it’s not necessarilybetter in the long run. Well, I think we’ve got more evidence to actually argue against that, but I think it’s importantfor us all to know that this means that we havetwo approaches that can work, at least two approaches thatcan work and not just one.So I don’t think ofthis as well, which one wins? I think of this aa well,this is another approach if this works better for you. So we have two studies nowthat are really well done, well controlled, randomized studies that have extended the durationof follow up to two years. And in the first study downhere at the bottom left was a study done in Israel, and that was actually a three-arm study. If you can’t see the three arms, one was a low fat, low-caloriediet, that’s the red line; the yellow was a Mediterranean diet; and the blue was a low carbohydrate diet.And this again confirmswhat I’ve said earlier, is that a low carb dietseems to do better early on, and it seems to kind ofconverge as time goes on. But in this particular study, the low carbohydrate andthe Mediterranean diet did better than the low fat,low-calorie diet at two years. And then in the upper right hand corner, the two diets basicallyparalleled the entire duration. You can see there is similar weight loss, good weight loss withboth of these approaches. And if you look at meta-analysis now, and I’d like to showthis one just to show you how many studies have been done, and this is not all ofthem, it’s not exhausted, this is just the 12-monthor longer studies, we now see that a low carbohydrate diet seems to have a small advantagein terms of weight loss at 12 months or longer.So about a kilogram, not quite a kilogram, that’s about two poundsgreater weight loss with that approach. But again, both of theapproaches are working. So how does weight loss occuron a low carbohydrate diet? It’s a question I get a lot. Why are people losing weight? Aren’t they just losing weight because they’re restricting calories? Well, that’s right, they are. So they’re restricting calories,but they’re not trying to. We’re not teaching themto restrict calories, we’re just saying loweryour carbohydrate intake and then spontaneouslythey eat fewer calories. So that… they’re still losing weight because they’re eating less calories, and this is probably one of the, you know, this a good example of that. This is from one of our studies where we put people either ona low carb or a low fat diet, and the black bar is their baseline diet.So both groups were eatingover 2,000 calories a day. And then with the lowcarbohydrate participants, they reduced it to a little over 1,500, something around 1,600 calories per day, even though we didn’ttell them to pay attention to calories at all. And on the other side, the low fat group, we taught them specifically. We want you to reduce your calorie intake by about a 500-calorie deficit per day, and that’s what they did. So they ended up both reducing calories. So another thing that’s out there is, could this be water loss? And yes, that is part of the equation. So with the low carbohydrate diet, there’s a diaeresis that occurs primarily in the first couple of weeks. And this is important toknow for a few reasons. First of all, becausethat’s part of the initial weight loss that occurs.So that can come back on quickly if you start eating carbohydrates. Another reason why youshould know that is because it’s really important to hydrate, especially in the firstcouple of weeks, okay? So you can see the linesup here that the real drop is just there in the first two weeks, and then thereafter, thewater loss or the water level, this is measured by bioelectric impedance, is pretty comparable betweenthe two diet approaches.So we really encouragepeople to drink water, particularly in the first couple of weeks, and we’ll actuallyencourage them to make sure they increase their salt intake. I know we’re gonna talk aboutincreasing their fat intake, now we’re talking aboutincreasing their salt intake. This is different from all theguidelines that are out there but it is important, particularlyin the first couple weeks, to get salt or broth inyour diet so you can hold on to your fluids, and then youdon’t have some of the symptoms that people will haveearly on when they’re doing a low carbohydrate diet. Some people call it theAtkins flu or the low carb flu or the keto flu, peoplecan feel rundown, tired, have headaches, get muscle cramps.And if they hydratewell enough and they get their salt intake, this doesn’t happen and they tolerate it quite well. Even if they do have those symptoms where they can stick withit, usually after two weeks those symptoms go away andthey feel fine after that. So it’s typically in thefirst couple of weeks. And then one other questionthat we frequently get regarding the weight changes that occur regards this possible metabolic advantage. So everybody wants to knowwhat’s the best way for me to keep up or boost my metabolic rate? And if you’re not familiar,when people lose weight, their metabolic rate goes down. That’s, if you haven’t heardthe Biggest Loser study that came out a few years back, was really kind of thefirst study that told me, we knew this but it’s thefirst one that really showed us this really clearly,and this is what makes weight loss difficult and particularly weight maintenance difficult.When people lose weight, theirmetabolic rate slows down and so they’re not ableto continue burning energy like they used to be. But this diet wanted to see if there’s a metabolic advantage. And so it’s a randomized crossover study and they had a run-in phasewhere they put people on a diet and found out what theirmaintenance diet would be.And then they randomlyassigned them to either a low fat diet, a low glycemic index diet or a low carb diet. And that’s this part down here, I don’t know if this laser works so well, but this table right here shows you the composition of the diet. So the low carbohydratediet was 10% carbohydrate and 60% fat and 30% protein. So participants successively randomly went to the next dietapproach until they’ve done all three of the diets, and forfour weeks of each each one. And they measured really carefully the resting energy expenditure using indirect calorimetry and then total energy expenditure using doubly labeled water. So these are gold standardtechniques to measure energy expenditure, andthey show the low fat, low glycemic index and thevery low carbohydrate diet in succession in bothof those graphs there.And what happened is thatthe energy expenditure was a little bit greaterwith the glycemic index diet than the low fat diet, and itwas even a little bit more, a little bit higher withthe low carbohydrate diet. So this shows there might bea little bit less reduction in the metabolic rateusing this particular diet during a dietary intervention. So I want to go into someof the metabolic effects that can happen too. So this is a big question that we receive. What’s gonna happen to myrisk for heart disease? If this is a high fatdiet, I’ve just told you it might be a high salt diet, what’s gonna happen to my blood pressure? What will happen to my cholesterol levels? We know that fat raises the cholesterol, raises your risk for heart disease, or that’s what we’ve all been told, but that’s actuallyprobably not so accurate. And these meta-analysesI’m gonna present to you will show you a littlebit about the effects on these risk factors. So again, this confirms theweight effects that we saw in a previous slide, about akilogram greater weight loss with the low carb versus the low fat diet, and that’s what the middlecolumn shows you there.It actually shows you that blood pressure seems to do just a smidge better with a low carbohydratethan a low fat diet, but it wasn’t statistically significant in this meta-analysis in about,it looks like, 18 trials. And then look what happensto the cholesterol effects. And this is kind of the hallmarkof the metabolic effects of a low carbohydrate diet. It’s a higher fat diet,and what fat does to your cholesterol results is itraises your HDL cholesterol. It raises your good cholesterol, okay? A lot of people knowthat if you want to raise your good cholesterol,you exercise more, right? Not many people knowthat you can do that also by eating more fat.And it’s any kind of fat. In fact, saturated fatprobably boosts it the most. But unsaturated fat will also boost your HDL cholesterol, okay? Now the differencebetween those two is that saturated fat also boostsyour LDL cholesterol, or potentially can boost it, whereas unsaturated fat does not, okay? So this is what you seewhen you’re comparing low carb versus, orminus the low fat diet. You see that you get a boostin the good cholesterol, the HDL, but you also havea little bit of a boost with the LDL cholesterol. And so really, the risk is a wash, or maybe if you remember that HDL is a little bit more ofa powerful risk factor, you probably get a little bit more benefit with a low carb diet justbecause that HDL is going up three points there. And then the otherconsistent effect you’ll see is that the triglycerides go down.And we actually can use this,follow this risk factor, this triglycerides, just actually to see how adherent people are. So Eric was talking aboutketones being one of the ways that we can look for adherence, but triglycerides will go down when you reduce carbohydrate intake, okay? It’s really, really consistent, also not really well known,not really intuitive. Why would the fats in my blood go down by cutting back on carbohydrate intake? But it’s what happens. So this looks just like thelast slide, but it’s not, okay? So this slide actually isa different meta-analysis, and what they did in this one is we, actually I should say we did in this one, we looked at the changefrom before and after just in the low carbohydratearms of these studies, okay? And I think this is useful to know. So not in comparison to a low fat diet, just what happens on alow carbohydrate diet. And again, you can see the changes there. Now you can see how much weight loss can be expected on average, the blood pressure changesthat you can expect on average on a diet like this, butI think what’s meaningful is to look at the LDL level.Notice that on a low carbohydrate diet, your LDL level doesn’t go up necessarily. It just doesn’t go down as much as it does with a low fat diet. And that’s why in the last slide, you could see a benefit goingtowards a low fat approach. And look how dramatic the effect where their triglycerides are. So diabetes is probably the issue that we think that a low carbohydrate diet might have the most benefit. And so I wanna spend a little bit of time going over some day regarding diabetes.This is a systematic review. It shows you that as anumber of investigators have looked at thisissue and wanted to see how much reducing carbohydrate impacts our blood sugar control. So this is a little bitof confusing of a slide, but they took any trial that had less than 45% carbohydrate recommendations and followed people for atleast two weeks, up to 26 weeks, and they plotted it onthe horizontal access as the percentage of carbohydrates, carbohydrate and calories I should say that were recommended; and then on the y-axis, it’s what change in A1c occurred, okay? And so the line showsyou that as you restrict carbohydrates lower, thenthere’s a greater decrease in hemoglobin A1c, orimprovement in glycemic control.So we reviewed this study,among other studies, with the American DiabetesAssociation in 2010 and wrote some recommendations. These are probably thefirst recommendations that have come out that actually supported a low carbohydrate diet for diabetes, and there’s still severalguidelines out there that don’t recommend alow carbohydrate diet and sometimes caution peopleagainst using low carb, lowering carbohydrates for diabetes. But the American DiabetesAssociation guidelines in this year actually did support it, and it is based somewhat onwhat we found in the literature. We updated a literature searchlooking at this diet approach among other diet approaches for diabetes, and we found quite a numberof studies, 11 trials done with a low carbohydratediet compared with similar other nutritional approaches. And six of the 10 studiesshowed an improvement in A1c, whereas with the other diet approaches, less than half of thestudies that were looked at actually showed an improvement in A1c.And then most recently, this just came out in January of this year, theydid this network meta-analysis which is pretty interestingway of looking at studies that might not have theexact same comparisons, not all necessarily lowcarb versus low fat, they might be comparing lowcarb to another diet approach or to a high-protein dietor a Paleolithic diet. And so they tried tocombine all of these studies and compare each of thesenutritional approaches to see what they can find. And first off, I think what’sinteresting is to see that the low carbohydrate node,that’s the blue dot at the end, is one of the bigger dots,meaning that it has one of the bigger sample sizes of participants that have been studiedin multiple studies.But these are the differentnutritional approaches that were studied. And their summary wasthe bottom bullet here, that for reducing A1c,the low carbohydrate diet was ranked as the best dietary approach in the ranking order, thesucrose statistic that they used, followed by these other diet approaches. So we think that for blood sugar control, and this makes intuitive sense, actually it’s one ofthe few intuitive things that we’ll talk aboutmetabolically that happens with this diet approach,is that carbohydrates are what drive our blood sugar level.And so reducing carbohydrate intake lowers the blood sugar level. So I just wanna show justa couple of other studies that we’ve done over theyears since we originally did the head-to-head kind of lowcarbohydrate, low fat studies. This one was one thatstemmed from, first of all, we heard or we we sawfrom our own research and other’s research thata low carbohydrate diet might be more effectivethan a low fat diet. So what about a low fat dietcombined with a medicine? How would it compareagainst the medication? And in this study, we comparedit to the one medication that was available at the time, Orlistat, and you may have heard of this as Xenical, it’s now over-the-counter as Alli, and this is the result from that study in terms of weight loss.And then you can see there’sa little bit of a benefit to the low carbohydrate diet initially, but at the end of a year,there seems to be comparable weight loss in the two approaches, one being a diet alone and the other being a diet combined with a medicine. I’d like to show this slide also, and I don’t know how well it projects, but the blue line, the dark blue line, is the average for the Orlistat group; and the dark red line is the average for the low carbohydrate group. But you should also see in the background hopefully some lighter red and blue lines, and this shows the variability that occurs in a weight loss trial andalso with our patients. There is a wide variety of response to either of these approaches, and we see this repeatedly. And I think this issomething that’s really lost in a lot of the press about these clinical trials.We talked about which one works better. On average, what happens? But in any individual,somebody might actually gain a little weight during the study, and there might be people in each arm, and believe me there areblue lines and red lines down here at the bottom, people who are losing in one year more than 30% of their originalbody weight with diet too. This is not surgery,this is just with diet. So it can be really powerfulin the right individuals or the people who are really motivated or stick to it, or maybeit’s just the right approach for them.This last one I’m gonna talkabout addresses an issue a lot of even experts have come up with after all of thisinformation has come out, and that is well, we have alot of nutritional approaches that work, maybe weshould let people choose. Well, maybe that’s not the best idea. So we wanted to test that. So obviously, letting peoplechoose what diet approach they follow might be beneficial because it might meanthey adhere to it better. This is one they picked,it might be based on foods they prefer andtherefore they might be able to stick to it longer. But it also might be the foods that have been causingthe problem all along. So we tested this in a doublyrandomized preference trial where we actually randomizedone group to get a choice and one group did not get a choice. And then those participantswho did not get a choice were randomized again to either a low carb or a low fat diet, okay? And this was a year-long study and yielded some prettyinteresting results. Turns out the control group, even though it wasn’tstatistically significant, did slightly better.So it was the differentdirection from what we expected. So no difference between the two groups. Choosing certainly didnot create a benefit and potentially could havegone the other direction. It might have actuallygone the wrong direction. All right, so hopefully this is a message that you snicker at after hearing some of the metabolic benefits you can get from a low carbohydrate diet. I see people craning theirnecks so I’ll read it. He says, “You went onAtkins and lost 90 pounds, “lowered your cholesterol,cured your high blood pressure, “and now you’re walking five miles a day. “But I’m warning you, “a low carbohydrate dietis bad for your health!” Something we still run into periodically. All right, I’m gonna passthe baton on to Eric, and he’s gonna take over from here and tell you a little bit about his clinical experience in our clinic, where we teach patients this approach.- Thank you, well done. And I should translate Atkins, it’s not Atkins, it’s keto now. So the first phase of Atkins is keto. And then I’m also gonna add in, “And my LDL went up 10 points,so it’s gonna kill me.” So as a joke becausethis is the last vestige of what has to change, is only the focus on a certain part of the lipid profile. It’s the metabolic syndromethat saved the low carb diet in terms of producingcardiometabolic risk.So about 12 years ago now, the Duke Lifestyle MedicineClinic was founded in 2006 after what we thought was the equivalent of phase III clinical trialsfor FDA approval of a drug. So oh, except there’s norequirement for a diet. But we were trying toapply that same metric. When do you start using adiet in a clinical practice? Well, when it reaches acertain level of evidence. And why not use a metricthat the FDA uses for drugs? It’s something we’re all familiar with. So we opened a clinic at university, within the Duke private practice. There are two rooms adjacentto an internal medicine teaching clinic because that’sthe general medicine home that we’re in academically.There’s an obesity medicinespecialist, yours truly; a clinical nurse assistant;and the payment is within the public or private insurance system. The first-line treatment is a low carbohydrate ketogenic diet. I should have said this at the beginning, I have two conflicts thatmay change how you hear what I say, but not what Dr. Yancy says, is that after 12 years ofresearch in clinical care, I started two companieswith other entrepreneurs, one to make low carb products and one to make a teaching company to teach doctors and healthpractitioners how to do this. So I’m actually ownerof those two companies. But I still work at Duke full time.(audience chuckling) A busy life. So thanks to some of youwho are here in the room, students, patients, colleagues. We now have over 10 yearsof data in the Duke system. We moved to Epic about five years ago in our outpatientclinic, so we’ve seen now 4,000 patients at the DukeLifestyle Medicine Clinic with 28,000 clinic visitswhich keeps me in business and makes my paycheck. Most of it is insurancepayments, Medicare, Medicaid.The average patients wesee are 50.5 years old. 75% are female, half Caucasian,half African-American, which is our Durham patient mix. Most are from our area. When I visited doctors whowere doing this for a living, many of them were kind ofin a guru-type practice. You would go visit someone, and then you’d go home. Actually, most of our patientslive in the area here. And the payer mix, 50%private, 50% public. And over the last five years, sorry, that’s the last five years, 2,000 patients have lost 28,000 pounds in a quality assurance,quality improvement sort of data analysis we want to make this publication quality,which means I wanna replicate it again doingit in a different way. Because if you’ve usedthe Epic and deduced, there are some quirks to using it. But that’s pretty exciting. Someone says, do youbelieve in low carb diet? Do you believe in the keto diet? I’ll say something like do you believe in gravity? (audience chuckling) You didn’t see it in theback, so I do believe.So it’s science. It’s not a belief. Well, although you mightargue philosophically science is just a belief system that you can replicateover and over and over. So this is known as theclinic of last resort. I’ll have people say they’vedone everything twice. Ah, but I’ll say but youhaven’t done this with me. So most doctors don’t get trained in how to help people lose weight. Anyone wanna verify that? You doctors who never were trained? We didn’t get nutrition training. It even occurs today.Medical students do not get trained. I went out to get special training. And then with Dr. Yancy,we were privy to data that no one else really hadcollected on the low carb diet. So we treat obesity, Type1 and Type 2 diabetes, polycystic ovarian syndrome,irritable bowel syndrome, fatty liver and GERD. We have papers, at leastproof of concept papers, published in the literaturefor all of these conditions in that first bullet.We look back and we say well, okay, yeah, there were five people oversix months with liver biopsies that show that fatty liver goes away, so it’s not enough to like FDAapproval for that indication, but that’s pretty goodevidence it’s the carbs that cause the fatty liver,not the fat in the food. It’s the carbs in the food. Think foie gras, whereyou feed geese carbs to make fatty liver. And that’s a delicacy insome parts of the world. Heart failure, pre-heart transplant. So I’m an old general internistfrom Duke who you know, we could treat anything, and now I realize there is a specialty called obesity medicine,we can’t treat everything.But I still have that vestige,so the heart failure folks started to get wind of whatI was doing without pills, without products andjust changing the food and now we have over a dozen people on the heart transplant list. So the the cardiothoracicsurgeons are sending us their patients because they’re too heavy to get a transplanted heart. Just last week, one of thepatients came back and said, you know they’re startingan ex plant program. Oh, what’s that? Well, I’ve lost so muchweight that my heart is now working at a45-percentage ejection fraction and they’re thinkingabout taking out my LVAD. Well, that’s pretty good. How are they gonna do it? Well, they say they’re gonna, I’m just making it up on the fly, right? So how are you gonna do that? Well, put them in the hospitaland turn off the pump.If you have any VADs (mumbles) and so you’re gonna turn offthe pump and see how he does. And then how are they gonnatake out the tubes and all that? I have no idea, rememberI’m not a surgeon. So I will treat anybody who is treatable, and it works better ifyou follow the plan, no question about it. Post bariatric surgery, weight regain. A lot of patients who neverlearned how to change the food, the harsh reality isperhaps even half of folks who get bariatric surgeryregain their weight over time. Early on, it looks really great, but then you follow them for 10 years if they haven’t learnedhow to eat and live in today’s world, oftenthey’ll regain the weight.And that 50% is kind ofsad when you think about it with all of the stuff thatthose people went through. So this is the clinic of last resort. So this patient backin the 1980s went to… A little trivia, does anyone know where the Roux-en-Ygastric bypass was created? (indistinct chattering)Oh no. (indistinct chattering) Will’s alma mater, it’s ECU in Greenville. Walter Pories. So this patient sought outWalter Pories back in 1984 for the Roux-en-Y gastric bypass because she wanted thebest surgeon on earth. And so then the surgeons dida revision on the Roux-en-Y, you can see she lost from 280 to 200 and then they’ve actually saidyou’re done, you’re at 210. And she said no I’m not. So she sought out thisobesity medicine specialist, another expert but not at ECU, at Duke. And then over the next five years, she’s down to her high school weight just by using a keto diet,low carb ketogenic diet and some Lasix. And it was 54 visits over five years, we estimated about $4,000 to insurance. She didn’t pay much, it was a copay, and you can compare that to the operations that were done before.But it’s kind of a team effort here. She’s thrilled, she’s 70 yearsold, going on 15 years old and just retired and nowthey’re moving to a mobile home. And anyway. So this is the kind ofmedicine you can use and do as an obesity medicine specialist. It’s exciting, it’s fun. We have great practices. We get to teach peopleand learn from them. This 25-year-old male atbaseline had a BMI of 49. Now the younger you are,the faster it works, better it works do it now because you’re nevergetting younger, yeah. So he said okay, I gotthis, there’s a one-hour teaching class we do at the clinic, I teach the basics, like Will mentioned; and he came back losing 15 pounds a month just eating at McDonald’s.I said, well, what do you eat? He said, well you know, you’rereally not very hungry. And so I have three double cheeseburgers off the dollar menu with no bun, no fries, and I drink green tea and a diet soda. And then he goes down tospring break in Daytona Beach and he drank some carbs, beer; and he didn’t lose weight,he didn’t gain weight, but he was thrilled that he didn’t, you know, he’s coming backand now he has a McChicken every now and then on the dollar menu. It doesn’t have to cost a lot of money. You can do it within thelifestyle of someone, knowing the principlethat it’s kind of like knowing how a bicycle works. You can make different kinds of bikes. So you can do it anywhere, youcan do it in the mountains, you can do it on a road. So knowing the principleof carb restriction, being the…Going throughblood sugar and insulin, we didn’t get into the details of that, but it’s basically the control knob for dialing your appetite and your weight. Basically, your fat burning. So this is pretty fun. And now getting to diabetes, there’s no patient more thrilled, in my experience, thanthose who get off insulin. And then they don’t even have to measure their blood sugars anymorebecause no other doctors repeatedly tell them that it’s possible. In fact, a lot of doctors will say you’re gonna have diabetes forever. Wow, that’s because they’ve never seen it! It would be like me goingto Africa and saying there are these big animalswith necks like this, and no (mumbles) so I’d take a picture. Here’s a picture ofpeople coming off insulin, and it can be really fast. So I’m recalling, we were sat last night and it was kind of like a retrospective.We’ve been doing this 20 years now. And when I first showedthese data to Rob Califf, it was our first 50patients over six months and I showed him the cholesterol, he said that’s a fibrate. And I said, no, that’s a low carb diet. So for you medication people, he was used to medications. He saw the lipid profilechange and he said that’s a fibrate, the effect of a fibrate. I said no, the low carb diet. He said we need to randomizepeople who have heart disease, who have diabetes andfollow them for two years. You’ll have an event sohigh that you’ll know whether it works or not. And I said wait a second, this is the first studyI’ve ever done on this and you’re talking about diabetes? So here’s what we know about diabetes now that we’ve been doingthis 12 years in the clinic.It’s that you add up all theinsulin, 100 units a day, cut it in half on the firstday if their blood sugars are in the hundreds,fairly well controlled; and so you have to cut the insulin in half on the first day or you risk hypoglycemia. So can you imagine us 15 years ago having a couple, well,500 people on insulin not knowing that they’regonna have to come off half of their insulin on the first day? It would have been a disaster.So now I’m ready to do that study though. We can monitor people,people have home monitors. We know that when the bloodsugars are getting down, you’re at 120, 100, you can’t take insulin. So I tell people, don’t take insulin if your blood sugar is under 100 or 120. And I’ll have people call me that night saying my blood sugar is 90, what do I do? I said, well, I told you thismorning not to take insulin. So you can tell peopleto do it but it’s so bizarre and unexpected,they’ll still ask for guidance. I said don’t take yourinsulin, you’ll go low. Oh right, if it’s 90 and Itake insulin, I’ll go low. So now this person’s off 100units of insulin in six weeks.80 units of insulin in one day. So you add up all the insulin, this person was on 40units twice a day here, I asked the high, the low bloodsugar, insulin, the weight, and nobody knows the right way to do it. If someone’s on 40twice a day, I might say just take 40 once a day. Or I might say 20 twicea day, I don’t know. We need research to knowhow to do that best. I try to work within theinsulin that a given person has. Off 60 units, now I’m tryingto show that this person was on insulin, glimepiride and metformin. You could just kind ofget rid of the pills. We keep people on metforminpartly as a safety blanket. Security blanket, peoplethink they’re still taking something for insulin, Idon’t know, for diabetes; I don’t know really how much it helps. Add up all of theinsulin, 100 units a day, off in three weeks,blood sugars are better or as good or better than before, and this is a common situationI get with endocrinologists.They’ll see this patientand say, well Dr. Westman, the blood sugars aren’tperfectly controlled. I say yeah, but they’renot on insulin anymore. Well, we need to put them on insulin to get their bloodsugar better controlled. But wait, when you had them,the blood sugars were worse on more insulin. So this is the push and pull you get with different specialists.If I don’t fix the obesity,the underlying cause of diabetes, they’realways gonna have diabetes. It’s just a different point of view. You have to treat the underlying cause, which is insulin resistance and obesity. Insulin for 10 years, it doesn’t seem to matter how long someone’s been on insulin. So be careful. Someone said oh, I’vebeen on insulin 20 years, I’ve taken it everyday. No, you might not need it tonight. Off 180 units of insulinalmost in one week. In retrospect, some of thesepatients are drinking soda they don’t tell you about. They’re drinking sugar, their insulin is treatingthe sugar they’re drinking and they don’t tell you about it. So you just monitor theblood sugar, it’s okay.So now we’re getting to industrialstrengths of insulin here but oh no, they’re making U-500. No, so that’s not the fixing of diabetes by using stronger insulin. The insulin is alreadytoo high in the blood. You want the insulin to go down. And anyway, so insulin for 25 years. Are you getting the picture? I mean, this is pretty reliable. Now this person’s on 40, 55, 60 units of the short-acting, 60 ofthe long-acting twice a day. 500 units of insulin a day. This person is still oninsulin, on about 80 units now about a year and a half into it.He’s not totally off, buthe has a hundred pounds of weight to lose. So the average BMI in myclinic is between 35 and 40, depending on your ethnicity. And so if someone still hasa lot of weight to lose, you might not get perfectcontrol on the blood sugar because it’s the weight that’s causing the insulin resistance,that’s causing the diabetes. But this guy’s at high risk for seeing another endocrinologistor doctor who says look, the blood sugars aren’tperfectly controlled, I need to put them on insulin again. And so then they’re gonnago back on the insulin, gain the weight back and then go back and not have perfect controlon 500 units of insulin because the problem isnot insufficient insulin, it’s insulin resistance.Insulin isn’t working right. So anyway, this is pretty fun. Insulin pumps, fine,just lower the insulin and people are in less insulin. Now hemoglobin A1c is just a reflection of the daily blood sugars, in general the three monthsaverage although you can get changes pretty quickly. Here you have A1cs on the right-hand side, someone whose A1cs were not controlled. The weight is about 300pounds, 67 year-old female, and her meds come off,her A1c is under six where it hadn’t been for10 years off medication. So mild diabetes. I mean, this is like yeah, it’s just kind of easy. But remember, we had allthose studies about obesity, and now a growing number about diabetes.This person, this is an internist’s dream. If you like to take careof complicated patients and fix them, this personis on medicine for diabetes, high blood pressure, GERD and had A1c over seven for 10 years and now on a low carbdiet within two years has a blood sugar A1c under six, off all the medications.So now Dr. Yancy has taughtme, Will has taught me a lot of things, that it’s nicer, you can attract more flieswith molasses than vinegar. But gosh darnit, this is fantastic! (audience laughing) When you get the emotionof people in the clinic, holy cow. I just had someone who had a renal transplantfrom his wife, from diabetes that he’s had for 15 yearsand then lost his kidneys and just had a transplant,so he’s on prednisone and now he’s off his insulin in a week.So he’s starting to go through this, I didn’t have to have diabetes, I didn’t have to go through,this is pretty heady stuff. It’s great and it’sjust changing the food. So when we get peoplewho say, oh that dialogue there are a lot of irrational fears that we’ve been taught. You’re welcome to come to my clinic, which was the answer thatDr. Atkins gave me in 1998 because there were so manythings that just didn’t compute. But what about the fat, what about this, what about the salt? So even today people come to our clinic to see it in action, toovercome all of these irrational fears that are out there. It’s fascinating. Sociologically, this is agoldmine of information. So anyway, other folks. So Dr. Yancy worked hisway through the system and is now Director of theDuke Diet and Fitness Center. And by, I think popular demand, and by his reading of the science, has a low carb program there as well, I worked at the Diet andFitness Center around 2001 and got motivated to change my life from a pill pushing internist to an obesity medicine doctorthat takes away medication and then realized that well,not everyone can afford the DFC but it’s a great place, and so we opened The Lifestyle Clinic to use that model of lifestyle change.And the DFC has been partof the Duke Health System for over 40 years. To our knowledge, it’s the only medicallysupervised residential-style weight management programwithin an academic medical center in the US. And so someone reallywants the credibility of the University andthen seeing the doctors often on a daily basis if needed. It’s staffed by medicalproviders, dietitians, exercise physiologists, behavior experts, swim instructor, certifiedcoaches and massage therapists. It’s helped more than 50,000clients from around the world. And if you haven’t been there, it’s just right around thecorner on Douglas Street behind the VA hospital. The old metro sport, the oldfitness center, turn there. So where do we go from here,and then some questions. Let us have it. There is an ongoing two-site VA study with diabetes going on,Durham and Greenville, and Will is the PI on that260 folks and in progress. They haven’t stopped it yet due to adverse events, Dr. Yancy? They have not stopped ityet due to adverse events according to Dr.Yancy. We’re gonna do retrospective analyses of the Lifestyle Medicine Clinic and the Duke Diet and Fitness Center. We’re happy to help andappreciate the help of students on our rotation of residents, of faculty if you have an interest here to look at what’s happened. For example we’re gonnapull out all the people with polycystic ovary syndrome because a current student on the rotation is interested in PCOS,we’re gonna go into GYN and see what’s happened. So we have over 100 people, and I mean this is like hotoff the press information as you’re on deduce right there. And then what’s really needed, and we got kind of sidetracked. I mean, we wrote paper,we wrote study proposals 15 years ago to do the diet trial to end all diet trials. Never got funded. We have proposals sitting around, maybe it’s time to dust them off but the limiting factors, wheredoes the money come, right? Who’s gonna fund the studythat takes you off insulin? Well, not the insulin providers, right? Or not the company.So we’re still trying to fix that. There are at least twopeople through NIH funded, probably gonna make theircareers, young investigators, K awards are a greatplace to start or the VA. We still need the multi-siterandomized controlled trials of LCHF with clinical endpointsfor heart disease, for, I’m ready to do that studywith people with diabetes and heart disease who’ve had events because I think we cantake people safely off the insulin now. And there was just a recent paper, a couple hundred people with diabetes, it was a single arm studydone in Indiana at Purdue, and it’s fantastic. The low carb, the ketoapproach for diabetes, 95% of folks with insulinwere taken off their insulin, something like that. It’s so unbelievable, nobody believes it. That’s the saying that we say. So I think that’s it. So thanks so much for your attention, and we have some time for questions. (audience clapping) Yeah.Do you want to moderate or do you mind? Okay, yeah. – [Woman] Thank you forthe great presentation. My question is like how do you compare the low carb diet witha mini fasting diet? Mini fasting, like interval fasting? – Interval fasting?- Yes. – Yes, so I don’t thinkthere has been a comparison of those two approaches. Most of the time that I’veseen the intermittent fasting, it’s been compared to justa standard low calorie, usually low fat diet. And it’s a daily calorie restriction for the control diet. I haven’t seen the low carbcompared to interim fasting. In terms of what’s going on, we actually think metabolicallythat a low carbohydrate diet is a fasting-type physiology. So there might be some benefits that people attribute to fasting, and which they also attributeto intermittent fasting that might be attributableto the low carbohydrate diet. But at this point, theintermittent fasting has just recently beenlooked at in clinical trials, probably in the last threeor four or five years or so.So we’re still waiting tohear more about that approach. At this point, what we’ve seenis that intermittent fasting works as well as a calorie reduction diet, not necessarily betteralthough there is some kind of physiologic evidence to show there might be some benefits. We haven’t seen that inhuman clinical trials yet. – [Kevin] Thanks Eric andWill, this has been great. Just to go back to the story, because I think the story is so important for everyone to hear, your first trial got theAmerican Heart Association to change their recommendations for diet. – Oh, shucks.- Yeah. (audience laughing) If you go back, rememberhow crazy this was when we first talkedabout this forever ago, the NIH turned down thefirst study recommendation because they didn’t wanna doa mortality study of diet.They didn’t think you needed to do that. And then go forward 15 years,over the last 15 years, we’ve seen lots of things about the harms of sugar in our diet, there’s now… when we first started, there was like six people in the country who believed what you believe. It’s obviously much broader now. And you’ve been amazing at continuing to both practice medicine and furthering this in the clinic and doing the research studies. So it’s a huge kudos to youboth to do that here at Duke. And hopefully we canfinally do this trial. We also got turned downfrom the NIH to do the trial over mobile phones. So we tried Internet-basedstudies of diet, mobile phone-based studies of diet and they frankly weren’t interested in doing the clinical trial.- [Dr. Yancy] That wouldbe great, thank you. – Yeah, if I was startinga new medical school or if someone asked me to help out, which I’ve never been asked, the first day would be nutrition. The most important thing for a doctor is knowing what you put in your mouth. And we get nothing. Why is that, Dr. Yancy? It’s complicated. There’s no room in the schedule. So anyway, diet is really important and that’s the kind of adviceyou get through our programs. Thanks, Kevin. It’s kind of like how manytimes do you scale the wall and try to get in the fortressand then you fall off. But another team will coalesce, yeah. – Hello, Dr. Westman. I’m gonna put a plug in for you. If anyone has any doubts abouthow well this program works, I started seeing Dr. Westmana couple of months ago, 27 pounds down.It is a very easy diet to follow, but I will retract the word diet and say that it is a lifestyle change. It doesn’t matter,you have to be motivated and really stick to it,but it is so, so easy. So I thank you in front ofmy co-workers and colleagues. And some of the questionsthat I had for you, you have answered today,so thank you again. – Well, thank you for that and… (audience clapping) So we have a support group,we have one once a month, first Tuesday of the monthat the Durham Hilton. And this last time, therewere 80 people who came out, half had similar storiesand they wanna share, they wanna help other people. I’m curious, aren’t you? What if we looked inthe database of people who came through theclinic with all the people with heart disease, with allthe people who have an LDL over I don’t know, whatever youthink is a bad LDL today? I’m reassured the last guideline really doesn’t have LDL in it.So triglyceride and HDL and age and whether you havehypertension and diabetes are important factors too. But if anyone’s interestedin looking at the data in terms of cardiovascularevents or risk or things, it’s retrospective but it’seminently publishable because nobody else has this kind of information. Yeah? – [Man] Just a second testimony, I’m sure you don’t wannago off in this tangent but people ask okay, is this healthy? I was 275 pounds in 2012, I am 173 pounds as of this morning. I am 61 years old, I take absolutely no prescription medicines. So it works.(audience clapping) – But you know, there are 99 things better than that one last thing.But what about the? The last vestige is kidney disease, right? It’s gonna kill your kidneys. And what about that LDL? Yeah, so… – [Woman] When do you suggest people who are on thelow carb high fat diet, less than 20 grams, when doyou suggest they can have an apple again or start eating some fruit or bringing that back into their diet? After they’ve reached a certain milestone? – Why don’t we both answer this? My view now from the Tampa Conference, University of South Florida, now that ketones are being studied, they actually have therapeutic effects. And we’ve gone, in my lifetime, in science from this is really bad and it’s gonna kill you, everyone.That’s what everyone thought so that you would get the pushback, don’t do this, from yourdoctor, your dietician, your grocery store clerk, right? So now we know that’s not true. But the studies now being done in animals, mice live 15% longerwhen they’re in ketosis. Holy cow. You might even prevent insulin resistance, which is the root cause of Alzheimer’s, which for some cancers they’re actually therapeutic or preventive. So now that the science is being done, now I’ve been doing keto because I like it and the science is looking good, but now oh my gosh! You might even be betterby never eating carbs again to the degree of even having an apple. Okay, now a more moderate response. (audience chuckling) – So I concur with what Eric said. I think we’ve kept patients, or we’ve followed patients who have kept at a very low level ofcarbohydrate intake for years. What I’ve talked to my patients about, about how to decide when toadd carbohydrates back in, and first of all thatshould be done very slowly, like five grams a day iswhat we suggest to people to do that for a week;and if you’re doing okay at the end of the week thenyou can add another five grams and then another five grams, you do it very systematically like that.But I tell them whenyou’re close to your goal, if you’re close to your goal, whatever that might be, itmight be your goal weight, it might be your goal blood sugar control, it might be your goal of getting off of your diabetes medicine, then that’s the time to consider it. The other caveat to that is when you feel like you can’tdo the diet any longer, if you feel like youjust can’t do it anymore and I’m really convincedthat they can’t do it anymore rather than like justletting them capitulate, then I’ll say well, have a little bit. Why don’t you have alittle bit of some berries? They’re pretty low in carbohydrate. Add some berries ifthat helps you to stick to the diet better. That would be the other approach I use.- At the Low Carb Conferencein West Palm Beach in January, there were a couple talks on how plants put toxins in their leaves so animals won’t eat them. This is a defense mechanism. So what do you think? We’re animals, right? So you look at these toxinsthat are in the vegetables, the argument that you need vegetables and then the leaves and allof that kind of is debatable. So there’s actually a subgroup of humans should be carnivores, eat nose-to-tail, make sure you get someliver, get some kidney and it’s an interesting debate.And I think it’s a reasonable one. And I know this is changing guideline, Kevin, as you mentioned. I have all those AmericanHeart Association, it’s the same people on the same paper without any new informationand they still have the guideline that’s low fat. I think that was last year,made the national news and we’re just kind of going, oh my god, it’s not a meta-analysis. It’s just a one-sided story. I think it’s something thatwe need science in on that. The Nutrition Coalition is a group that is advocating tochange the guidelines, started by Nina Teicholzwho wrote the book, The Big Fat Surprise. Of course, Gary Taube’sGood Calories Bad Calories is a great place to startif you’re really geeky. And then Gary came out with a book, The Case Against Sugar in January, which again, as Kevin mentioned, people are zeroing in on sugar. But we risk the pendulum, well, okay, that’s been bad so long, okay that’s fine and now sugar is bad, you know? We need science to help guide us there.You still eat carbs, Dr. Yancy, don’t you? – I’m on a maintenancecarb diet is what I eat. (audience laughing) – I saw you eating carbs.(audience laughing) – I’m maintaining, I’m at my goal. – I mean, there is kindof a cult-like atmosphere, but it’s only because of the low fat cult, right? And it’s not a cult, it’sjust the way our bodies work. But I think I countedseven people in this room, when you’re in the minority, you tend to kind of cluster together as a protective mechanism. I’m just kind of vamping becauseI don’t see any questions. (audience laughing) – Okay, we’re actually over time, but thank you so much for awonderful and provocative talk. We look forward to havingyou back in 2021, 2022 with the results of the diabetes study… (audience clapping) (uplifting music)


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