#364 – AMA #75: Diets: how to evaluate and implement any diet including keto, carnivore, vegan, Mediterranean, and more

View the Show Notes Page for This Episode https://peterattiamd.com/ama75/?utm_source=podcast-feed&utm_medium=referral&utm_campaign=250915-pod-ama74&utm_content=250915-pod-ama75-podfeed Become a Member to Receive Exclusive Content https://peterattiamd.com/subscribe/?utm_source=podcast-feed&utm_medium=referral&utm_campaign=250915-pod-ama75&utm_content=250915-pod-ama75-podfeed Sign Up to Receive Peter's Weekly Newsletter https://peterattiamd.com/newsletter/?utm_source=podcast-feed&utm_medium=referral&utm_campaign=250915-pod-ama75&utm_content=250915-pod-ama75-podfeed In this "Ask Me Anything" (AMA) episode, Peter explores how to determine the right diet for yourself rather than searching for a universal "best" diet. He begins by laying out five non-negotiable criteria that any sustainable eating pattern must meet—energy balance, metabolic health, adequate protein, micronutrient sufficiency, and long-term adherence—before introducing a practical rubric for evaluating different diets. Using this framework, Peter walks through the ketogenic, carnivore, vegan, and Mediterranean diets, highlighting their strengths, ideal candidates for each, and common pitfalls such as micronutrient gaps or adherence challenges. He explains why this guidance is aimed at people who feel overwhelmed by diet choices, not zealots defending a single approach, and provides practical advice on using tools like DEXA scans, lab markers, continuous glucose monitors, and symptom tracking to assess whether a diet is truly working. If you're not a subscriber and are listening on a podcast player, you'll only be able to hear a preview of the AMA. If you're a subscriber, you can now listen to this full episode on your private RSS feed https://peterattiamd.com/members/private-podcast-feed/?utm_source=podcast-feed&utm_medium=referral&utm_campaign=250915-pod-ama75&utm_content=250915-pod-ama75-podfeedor our website at the AMA #75 show notes page http://peterattiamd.com/ama75/?utm_source=podcast-feed&utm_medium=referral&utm_campaign=250915-pod-ama75&utm_content=250915-pod-ama75-podfeed. If you are not a subscriber, you can learn more about the subscriber benefits here https://peterattiamd.com/subscribe/?utm_source=podcast-feed&utm_medium=referral&utm_campaign=250915-pod-ama75&utm_content=250915-pod-ama75-podfeed. We discuss: Peter's family chess battle [3:00]; Framing the diet discussion: moving past tribalism to practical frameworks for evaluating various dietary strategies [5:00]; Peter's high-level nutrition framework [11:00]; Why diet is such a uniquely polarizing subject [14:15]; The five non-negotiables that apply to any diet [17:45]; How to think about energy balance in the context of evaluating a specific diet [20:15]; How diet can address metabolic health [21:45]; Protein as a dietary foundation [23:30]; Micronutrient essentials: avoiding deficiencies in restrictive and processed diets [24:45]; Why adherence and sustainability are essential for diet success [27:15]; Examining the standard American diet through the five non-negotiables [31:00]; The evaluation framework for specific diets [33:30]; The ketogenic diet: defining ketosis, clinical origins, modern uses, and potential health benefits [35:00]; The main strengths and weaknesses of the ketogenic diet [43:00]; How to avoid micronutrient deficiencies while on a ketogenic diet [47:15]; Electrolytes and fiber and the ketogenic diet: preventing magnesium loss and maintaining digestive health [49:15]; Adherence challenges of the ketogenic diet [51:30]; The carnivore diet: definition, motivations, anecdotal benefits, and possible mechanisms [53:15]; The main strengths and weaknesses of the carnivore diet [57:30]; Plant exclusion on the carnivore diet: nutrient gaps, gut changes, and unanswered questions [1:03:15]; Adherence challenges of the carnivore diet [1:04:45]; The vegan diet: definition, core beliefs, and various motivations for this strategy [1:05:45]; The main strengths and weaknesses of the vegan diet [1:09:15]; Adherence to the vegan diet: social acceptance, edge cases, and personal sustainability [1:13:15]; The Mediterranean diet: definitional challenges, traditional patterns, and its relatively strong evidence base [1:15:15]; Limitations of the Mediterranean diet: loose definitions and indulgence risks [1:19:30]; Measuring diet success: why setting clear goals and tracking outcomes matter [1:21:00]; Tracking body composition using DEXA scans [1:22:15]; Tracking metabolic health: key blood tests and advanced glucose monitoring tools [1:22:45]; Using elimination diets to identify food sensitivities that may cause digestive problems, autoimmune symptoms, or low energy [1:23:30]; Evaluating "anti-inflammatory diets": confirming inflammation through symptoms and hs-CRP testing [1:25:15]; Final takeaways: flexibility, structure, and avoiding dogma in dietary choices [1:27:00]; and More. Connect With Peter on Twitter https://twitter.com/PeterAttiaMD, Instagram https://www.instagram.com/peterattiamd/, Facebook https://www.facebook.com/peterattiamd/ and YouTube https://www.youtube.com/channel/UC8kGsMa0LygSX9nkBcBH1Sg

Speaker names marked ? are inferred from speaking time and the show’s known hosts — they are not voice-verified.

• 0:10Dr. Peter Attia?

  Hey everyone, welcome to a sneak peek Ask Me Anything, or AMA, episode of the Drive Podcast. I'm your host, Peter Attia. At the end of this short episode, I'll explain how you can access the AMA episodes in full, along with a ton of other membership benefits we've created. Or you can learn more now by going to peterattiamd.com/subscribe. So without further delay, here's today's sneak peek of the Ask Me Anything episode. Welcome to Ask Me Anything, AMA, episode 75. In today's AMA, we're taking a closer look at how to choose a diet for yourself, rather than which diet is the best of them

• 0:50Dr. Peter Attia?

  all. I start by laying out the five non-negotiables every sustainable eating pattern must hit: Energy balance, metabolic health, adequacy of protein, micronutrient sufficiency, and long-term adherence. From there, we introduce a simple rubric. First, define the diet's rules, then pinpoint its strengths and ideal users, and finally, surface the potential pitfalls, so you can make corrections when necessary. With that framework, I walk through the four diets you asked about most: ketogenic, carnivore, vegan, and Mediterranean, to show how to apply the framework. We discuss why I'm aiming this episode at the majority

• 1:30Dr. Peter Attia?

  of people who feel confused, not the diet zealots, so everyone has a common sense roadmap. A deep dive into each of the five non-negotiables, for any diet, and how missing even one can sink long-term results. Applying the "Define, Strengths, Weaknesses" rubric to keto, carnivore, vegan, and Mediterranean diets, highlighting metabolic effects, micronutrient gaps, and adherence hurdles. Practical ways to track progress: DEXA scans, important lab metrics like fasting insulin, hemoglobin A1C, CGMs, and simple symptoms to log, so you know whether a diet is actually working. Why there's no single perfect diet, and instead, the best diet meets those Five core needs and your current goals and how to iterate as life changes.

• 2:14Dr. Peter Attia?

  If you're a subscriber and you want to watch the full video of this podcast, you can find it on the show notes page. And if you're not a subscriber, you can watch the sneak peek of this video on our YouTube page. So without further delay, I hope you enjoy AMA 75.

• 2:33Speaker 01

  Peter, welcome to another Ask Me Anything. How are you feeling?

• 2:38Dr. Peter Attia?

  I'm honored to be back. Thank you for having me.

• 2:40Speaker 01

  Do you ever think about just sleeping in the podcast studio? So you can just be ready at any given moment if we need you to record something?

• 2:49Dr. Peter Attia?

  I think there are times when my wife would like that.

• 2:51Speaker 01

  We should just on the other side of the table in the studio, just put a tent and every now and then you and the boys just camp in the studio.

• 2:58Dr. Peter Attia?

  Could work. That could work.

• 3:00Speaker 01

  All right.

• 3:01Dr. Peter Attia?

  Speaking of the boys, quick chess update. We had a little chess tournament, in-house chess tournament this weekend. I made it to the finals with the youngest, my youngest boy. And I was playing kind of a bananas game, kind of playing lights out chess. And this is the one that loves to trash talk, so it was awesome. And then I made this idiotic blunder and in a second, the game changed. And five moves later, it's checkmate against me. And I was like, God, this is why I love and hate this game so much.

• 3:34Speaker 01

  I do love that you started this by bragging about making it to the finals of an in-house chess tournament, which composed of three people.

• 3:42Dr. Peter Attia?

  No, no, no. There are a few others. There were some other people in the tournament. Yeah, yeah, yeah.

• 3:46Speaker 01

  I thought it was you and the two boys, both under 11. And I was like, it's kind of kind of audacious to brag about making it to the finals of a three-person chess tournament, two of which can't even drive yet. But okay, that's good to hear. There was more people involved. The bigger question is, when you lost that game, did any pieces go flying through the air?

• 4:07Dr. Peter Attia?

  It happened one time, Nick. One time. I'll never live it down.

• 4:11Speaker 01

  One time during this chess?

• 4:12Dr. Peter Attia?

  No, no, no. It only happened that one time. I am not a chess piece thrower ordinarily.

• 4:18Speaker 01

  That's because Mama Atiya put her foot down.

• 4:20Dr. Peter Attia?

  That's true.

• 4:21Speaker 01

  Have you gotten Jill to start playing chess yet?

• 4:23Dr. Peter Attia?

  Zero chance Jill will ever play chess.

• 4:28Speaker 01

  I don't know. Never say never. You sometimes do things that you said you never were gonna do in the past, so you kind of never know. I mean, much like this AMA, which is all on not only your favorite meta-topic, but your favorite micro-topic. Not only is this nutrition-focused, but it's diet-specific focused, which anyone who's listened to this for a while knows, maybe not your favorite topic to cover, but I think it's gonna be really good. Here's why. We get a ton of question on diets, and I think it's because there's so much information in the ether on diets. And so what we did is we gathered those questions, we went to the audience, asked

• 5:09Speaker 01

  for questions, combined them all, organized them, and we're gonna structure them in this way. The goal here is to not be a nutrition AMA, which we've done before, which we can link. It's much more to focus on diets. And to do it in a way that doesn't really talk about everyone should follow this diet, or this diet, or this diet, and not to kind of join the tribal battles that people see, but instead, really just take a pragmatic listen, and really identify, how can anyone listening to this, understand the pros, cons, how to think about diets, and put it into their own life. In it, we want to give people a framework

• 5:50Speaker 01

  to evaluate a dietary approach, whether you follow the same one now, that you did years ago, or you change in the future. To do that, we'll start by laying out the five non-negotiables that you think any diet must address. So no matter if it's vegan or carnivore, what are the approaches that they all should follow? And then we're gonna evaluate each diet through a framework, which is, what are the core requirements for that diet to work? What are its strengths, including who is it best suited for? Because oftentimes, we've talked, is sometimes there's gonna be different diets that are better for different people. So what is that, and why is that? And then we'll look at its weaknesses, which is, if someone's gonna follow a diet, what are some of the pitfalls, and how can they be addressed, and

• 6:34Speaker 01

  how can they avoid those? And then with that framework, we'll cover four of the diets that are asked about us the most, seem to be talked about the most, and paint the broadest picture, which is keto, carnivore, vegan, and Mediterranean. And we'll close with practical takeaways. So we got a lot of diet talk today. Anything you want to add before we roll into it?

• 6:59Dr. Peter Attia?

  I think that's a good setup. I'll add two unrelated comments. The first is, yeah, you pointed out how much I just generally don't enjoy this subject matter. And the reason for it is it tends to very quickly degrade into tribal religious discussions as opposed to scientific discussions. And there tends to be almost a morality that comes out of this, which I just frankly, don't think belongs in the space. But at the convincing of many listeners and our team have reluctantly decided that it's worth doing. And I think that sort of feeds into the second point, which is, I came into this kicking and screaming, not wanting to do it. But I think Josh Roche on our team

• 7:41Dr. Peter Attia?

  did a great job of pointing out, Peter, you're not doing this for the extremes. You're not doing this for the extremists in each of these camps. You're not doing this for someone who is so hardcore in a dietary camp that they believe that their diet is the one true diet, and anyone who doesn't eat that way is an awful human being. Like, you're not trying to talk that person off that perch. You're doing this for frankly, the 87% of people who are confused, who are in the middle, who don't quite know what to do, who have tried this, and they're not sure if it makes sense. I think that was a very helpful framing for me, because it's very easy for me to focus on the fanatics. And the fanatics across

• 8:25Dr. Peter Attia?

  all lenses really turn me off. But as long as I just keep in my mind that I'm not talking to those people, I'm here for virtually everybody else, which fortunately is the majority of people who just kind of want some common sense frameworks for how to evaluate these dietary strategies. So with that said, I feel a little bit better about it.

• 8:44Speaker 01

  That's great. I imagine you'd feel even better if you won that in-house chess tournament, but it's probably always good to have a chip on your shoulder.

• 8:50Dr. Peter Attia?

  Don't think we're not having a rematch, and don't think I am not going to put a world of hurt on that little seven-year-old.

• 8:58Speaker 01

  In chess.

• 9:00Speaker 01

  Just to clarify.

• 9:02Dr. Peter Attia?

  By the way, he spent the rest of the weekend walking around the house telling everybody how he smoked my bags. I mean, you couldn't help but laugh.

• 9:11Speaker 01

  You have to, especially because it sounds like he did.

• 9:13Dr. Peter Attia?

  He did.

• 9:14Speaker 01

  It sounds like he just put you in his pocket.

• 9:17Dr. Peter Attia?

  Yep, we could talk about that all day.

• 9:20Speaker 01

  We'll save that for the seven year old roundtable we still need to set up.

• 9:23Dr. Peter Attia?

  All right.

• 9:24Speaker 01

  So maybe before we start, we've kind of mentioned quickly, we did a nutrition AMA somewhat recently, we'll link to it. Do you just kind of want to walk through how you think about nutrition and diets a little differently?

• 9:37Dr. Peter Attia?

  Yeah, so the nutrition AMA, which was released, I think it was December of last year, it covered the big picture questions. Is there a best diet? How does nutrition compare to exercise for health outcomes? How much protein do you actually need for maintenance versus muscle growth? But it didn't really delve into, I think, the way most people think about it, which is individual dietary approaches. Now, in the past, I've said, look, people should pick a diet that they can stick to and that meets a certain list of non-negotiable physiologic states and needs. But how to exactly go about doing that? We haven't talked about that, frankly. And frankly, what should people watch out for? How do you make a decision and know if it's the right choice for you?

• 10:21Dr. Peter Attia?

  Thank you for listening to today's sneak peek AMA episode of The Drive. If you're interested in hearing the complete version of this AMA, you'll want to become a premium member. It's extremely important to me to provide all of this content without relying on paid ads. To do this, our work is made entirely possible by our members. And in return, we offer exclusive, member-only content and benefits above and beyond what is available for free. So if you want to take your knowledge of this space to the next level, it's our goal to ensure members get back much more than the price of the subscription. Premium membership includes several benefits. First, comprehensive podcast show notes that detail every topic, paper, person, and thing that we discuss in each

• 11:04Dr. Peter Attia?

  episode. And the word on the street is, nobody's show notes rival ours. Second, monthly Ask Me Anything or AMA episodes. These episodes are comprised of detailed responses to subscriber questions typically focused on a single topic and are designed to offer a great deal of clarity and detail on topics of special interest to our members. You'll also get access to the show notes for these episodes, of course. Third, delivery of our premium newsletter, which is put together by our dedicated team of research analysts. This newsletter covers a wide range of topics related to longevity and provides much more detail than our free weekly newsletter. Fourth, access to our private podcast feed that provides you with access to every episode,

• 11:48Dr. Peter Attia?

  including AMAs, sans the spiel you're listening to now, and in your regular podcast feed. Fifth, the Qualies, an additional member-only podcast we put together that serves as a highlight reel featuring the best excerpts from previous episodes of the drive. This is a great way to catch up on previous episodes without having to go back and listen to each one of them. And finally, other benefits that are added along the way. If you want to learn more and access these member-only benefits, you can head over to peterattiamd.com/subscribe. You can also find me on YouTube, Instagram, and Twitter, all with the handle PeterAtiaMD. You can also leave us a review on Apple Podcasts or whatever podcast player you use.

• 12:33Dr. Peter Attia?

  This podcast is for general informational purposes only and does not constitute the practice of medicine, nursing, or other professional healthcare services, including the giving of medical advice. No doctor-patient relationship is formed. The use of this information and the materials linked to this podcast is at the user's own risk. The content on this podcast is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Users should not disregard or delay in obtaining medical advice from any medical condition they have, and they should seek the assistance of their healthcare professionals for any such conditions. Finally, I take all conflicts of interest very seriously. For all of my disclosures and the companies I invest in or advise,

• 13:15Dr. Peter Attia?

  please visit peterattiamd.com/About, where I keep an up-to-date and active list of all disclosures.