Is a strict long-term carnivore diet generally a healthy, nutritionally adequate way for humans to eat?
The discussion asks whether long-term eating only animal foods can keep humans healthy and nutritionally replete, rather than needing plants. Since late 2025, Annette Bosworth (The Diary Of A CEO) and Dom D'Agostino (The Peter Attia Drive) have argued that strict carnivore diets can meet nutrient needs and aid disease. Over the same period, Natalie Crawford (The Diary Of A CEO) and David Jockers (Dr. Jockers Functional Nutrition) have raised microbiome, hormonal, and long-term suitability concerns about strict carnivore diets.
A strict long-term carnivore diet can generally be healthy and nutritionally adequate.
Dom D'Agostino (The Peter Attia Drive) says carnivore diets are therapeutic for autoimmune disorders and that steak-based diets supply essentially all needed micronutrients without observed vitamin C deficiency. Annette Bosworth (The Diary Of A CEO) claims a carnivore diet still gives enough vitamin C because, in that metabolic state, vitamin C follows different rules. D'Agostino notes that, apart from possible gaps in vitamin C and magnesium, animal-based protein provides almost all other micronutrients.
2 claims, in their words
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“you still get a good vitamin C. So vitamin C has different rules when you go carnivore.”
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“carnivore diets can be therapeutic for people who have autoimmune disorders. So, that's pretty clear. ... Steak and an animal-based protein diet has pretty much all the micronutrients. I mean, you could argue maybe vitamin C and magnesium, but you do not see vitamin C deficiency in people that are on carnivore diets, surprisingly.”
Humans are better suited to omnivorous diets; long-term carnivore usually harms health or nutrients.
Chris Masterjohn (Culture Apothecary) argues humans are meant to be omnivores who eat both animals and plants, and that moving away from this pattern increases the chance of health problems. Natalie Crawford (The Diary Of A CEO) says a carnivore diet does not support a healthy microbiome and is not hormonally healthy. Masterjohn states that without plants it is hard to obtain enough vitamin C, because animal foods contain little and cooking destroys much of it, so careful planning is required. Cynthia Thurlow (Dr. Jockers Functional Nutrition) reports craving vegetables daily during nine months on full carnivore after hospitalization and concludes humans are designed to be more omnivorous.
4 claims, in their words
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“A lot of that, though, is nuanced by the fact that people who eat plant-based sources of proteins tend to eat other plants in general and less ultra-processed foods, then people have the highest quartile of meat intake. ... Animal meat does not have fiber in it. So we know it's not feeding our gut microbiome. ... carnivore diet, things”
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“I totally agree with you. I think that we are Are meant to be omnivores. We are meant to eat both animal plants, animals and plants. And so I do think that the more you divert from that, the more trouble you're likely to get into.”
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“if you cut Big food groups out of your diet, you now need to think, oh, I cut out plants, where am I going to get my vitamin C? If you look at animal foods, where do you get vitamin C? There's some vitamin C in shellfish, there's some vitamin C in liver, there's a tiny bit in meat that”
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“I was full carnivore for nine months after being hospitalized in 2019. And do you You know, I thought every day, I couldn't tolerate the vegetables or fiber, but I thought every day about vegetables. And so I think we are designed to be more omnivorous”
Carnivore can help some people or short-term, but unsuitable for most long-term.
David Jockers (Dr. Jockers Functional Nutrition) argues that only a small subset, about 10 to 20 percent of people, can truly thrive on a long-term carnivore diet. He says maybe up to two-thirds of people do well on a carnivore diet for a week or a month but then should add plant foods to support their microbiome. Jockers says the idea that carnivore is only good short-term is partly true, because for some people microbiome changes later become harmful. He suggests that when blood sugar is very stable on carnivore, the body needs fewer antioxidants, so nutrient deficiencies like vitamin C deficiency do not appear.
7 claims, in their words
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“the myth that it's bad for the microbiome is not actually true. It can be bad, it can be good.”
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“maybe up to two-thirds of our population, that could actually do really well in a short-term carnivore diet, maybe for a week or maybe a month, right? And they're going to thrive doing that, but then they need to add back some plant-based foods, after that to help optimize their microbiome. And then there's a smaller subset, maybe a third”
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“Other people actually do really, really well on a carnivore diet long-term, and in fact, there are people that have been doing it for years, that have been documenting themselves and getting blood work done, and everything looks great.”
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“A lot of people think that a carnivore diet is a nutrient, you're going to have nutrient deficiencies. You're going to get your vitamin C. But actually, if your blood sugar is very stable, your need for antioxidants goes down significantly. And somebody that's following a carnivore diet is going to have a very stable blood sugar and insulin level,”
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“My hypothesis, though, is that for some individuals, they are going to thrive long-term, right? Most people probably not, are probably not going to thrive long-term. So it's kind of a small sub, subset, maybe 10 to 20 percent, that could thrive long-term on a carnivore diet”
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“On one side, you got people that thrive on a carnivore diet. This is, this is because their microbiome actually does really well on a low to no fiber diet. It actually creates the positive changes inside of their microbiome where their mitochondria in their enterocytes are able to function and thrive.”
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“one of the common myths is that the carnivore diet may be good short-term, and that you'll lose weight short-term, reduce inflammation, but it's not good long-term. And this is a yes and no, okay? The reason why it's a yes and no is that for some people it is really good short-term, but not good long-term, right? And so”
Listeners of “Humans are better suited to omnivorous diets; long-term carnivore usually harms health or nutrients.” have not heard
Listeners of these shows have not heard Dom D'Agostino's claim that carnivore diets can be therapeutic for autoimmune disorders while providing almost all needed micronutrients without vitamin C deficiency. They have not heard David Jockers' explanation that some people thrive on carnivore because their microbiome does well with low or no fiber, improving mitochondrial function. They also have not heard Jockers' argument that very stable blood sugar on carnivore lowers antioxidant requirements, so nutrient deficiencies like vitamin C deficiency may not appear. Nor have they heard his view that carnivore can reduce weight and inflammation short-term but that later microbiome shifts can make it unsuitable long-term for some.
4 unanswered arguments, in their words
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“A lot of people think that a carnivore diet is a nutrient, you're going to have nutrient deficiencies. You're going to get your vitamin C. But actually, if your blood sugar is very stable, your need for antioxidants goes down significantly. And somebody that's following a carnivore diet is going to have a very stable blood sugar and insulin level,”
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“On one side, you got people that thrive on a carnivore diet. This is, this is because their microbiome actually does really well on a low to no fiber diet. It actually creates the positive changes inside of their microbiome where their mitochondria in their enterocytes are able to function and thrive.”
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“carnivore diets can be therapeutic for people who have autoimmune disorders. So, that's pretty clear. ... Steak and an animal-based protein diet has pretty much all the micronutrients. I mean, you could argue maybe vitamin C and magnesium, but you do not see vitamin C deficiency in people that are on carnivore diets, surprisingly.”
-
“one of the common myths is that the carnivore diet may be good short-term, and that you'll lose weight short-term, reduce inflammation, but it's not good long-term. And this is a yes and no, okay? The reason why it's a yes and no is that for some people it is really good short-term, but not good long-term, right? And so”
Listeners of “A strict long-term carnivore diet can generally be healthy and nutritionally adequate.” have not heard
Listeners of these shows have not heard Chris Masterjohn's argument that humans are meant to be omnivores and that deviating from omnivory increases the risk of problems. They have not heard Masterjohn's claim that without plants, vitamin C is difficult to get because animal foods contain little and cooking destroys much of it. They also have not heard David Jockers' view that for some people, carnivore helps short-term but later microbiome changes can make the diet harmful. Nor have they heard Jockers' argument that very stable blood sugar on carnivore reduces antioxidant needs so vitamin C deficiency does not arise.
5 unanswered arguments, in their words
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“I totally agree with you. I think that we are Are meant to be omnivores. We are meant to eat both animal plants, animals and plants. And so I do think that the more you divert from that, the more trouble you're likely to get into.”
-
“one of the common myths is that the carnivore diet may be good short-term, and that you'll lose weight short-term, reduce inflammation, but it's not good long-term. And this is a yes and no, okay? The reason why it's a yes and no is that for some people it is really good short-term, but not good long-term, right? And so”
-
“On one side, you got people that thrive on a carnivore diet. This is, this is because their microbiome actually does really well on a low to no fiber diet. It actually creates the positive changes inside of their microbiome where their mitochondria in their enterocytes are able to function and thrive.”
-
“if you cut Big food groups out of your diet, you now need to think, oh, I cut out plants, where am I going to get my vitamin C? If you look at animal foods, where do you get vitamin C? There's some vitamin C in shellfish, there's some vitamin C in liver, there's a tiny bit in meat that”
-
“A lot of people think that a carnivore diet is a nutrient, you're going to have nutrient deficiencies. You're going to get your vitamin C. But actually, if your blood sugar is very stable, your need for antioxidants goes down significantly. And somebody that's following a carnivore diet is going to have a very stable blood sugar and insulin level,”
Listeners of “Carnivore can help some people or short-term, but unsuitable for most long-term.” have not heard
Listeners of these shows have not heard Dom D'Agostino's assertion that steak-based carnivore diets can be therapeutic for autoimmune disorders and supply nearly all micronutrients without observed vitamin C deficiency. They have not heard Chris Masterjohn's view that humans are meant to eat both plants and animals and that straying from omnivory raises the likelihood of trouble. They also have not heard Masterjohn's warning that dropping plants makes vitamin C hard to obtain because animal foods contain little and cooking destroys what they contain.
3 unanswered arguments, in their words
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“I totally agree with you. I think that we are Are meant to be omnivores. We are meant to eat both animal plants, animals and plants. And so I do think that the more you divert from that, the more trouble you're likely to get into.”
-
“if you cut Big food groups out of your diet, you now need to think, oh, I cut out plants, where am I going to get my vitamin C? If you look at animal foods, where do you get vitamin C? There's some vitamin C in shellfish, there's some vitamin C in liver, there's a tiny bit in meat that”
-
“carnivore diets can be therapeutic for people who have autoimmune disorders. So, that's pretty clear. ... Steak and an animal-based protein diet has pretty much all the micronutrients. I mean, you could argue maybe vitamin C and magnesium, but you do not see vitamin C deficiency in people that are on carnivore diets, surprisingly.”
Supporters highlight carnivore's reported disease benefits and near-complete micronutrient profile, yet omnivore advocates' shows never discuss those specific autoimmune and sufficiency claims. Omnivore advocates stress human omnivory and vitamin C difficulty without plants, but mixed-position shows rarely engage those claims while discussing who thrives on carnivore.
- Oct 16, 2026 3 new claims (The Diary Of A CEO, The Peter Attia Drive).
- Oct 13, 2026 3 new claims (Dr. Jockers Functional Nutrition, The Diary Of A CEO, Culture Apothecary).
- Oct 9, 2026 Published: cleared the gate.
- Oct 9, 2026 David Jockers moved from “a carnivore diet is healthy for the gut microbiome.” to “It depends on the person and how long they follow it.”.
- Oct 9, 2026 3 new claims (Dr. Jockers Functional Nutrition, The Peter Attia Drive, Culture Apothecary).
- Oct 7, 2026 3 new claims (Dr. Jockers Functional Nutrition).
- Oct 7, 2026 2 new claims (The Diary Of A CEO).
- Oct 7, 2026 Dr Natalie Crawford moved from “Yes, the carnivore diet is healthy for the microbiome and hormones long-term for some people.” to “No, the carnivore diet is not healthy for the microbiome and hormones long-term for most people.”.
- Oct 7, 2026 David Jockers moved from “only a small percentage can thrive long-term on a carnivore diet.” to “Yes, the carnivore diet is healthy for the microbiome and hormones long-term for some people.”.
- Oct 7, 2026 3 new claims (Dr. Jockers Functional Nutrition, The Diary Of A CEO).
- Oct 6, 2026 David Jockers moved from “only a small percentage can thrive long-term on a carnivore diet.” to “some people can thrive long-term on a carnivore diet.”.
- Oct 5, 2026 David Jockers moved from “only a small percentage can thrive long-term on a carnivore diet.” to “some people can thrive long-term on a carnivore diet.”.
- Oct 4, 2026 David Jockers moved from “only a small percentage can thrive long-term on a carnivore diet.” to “some people can thrive long-term on a carnivore diet.”.
- Oct 4, 2026 4 new claims (Dr. Jockers Functional Nutrition).
Published because: 4 shows, 3 positions, 333 days of debate. Questions publish only when claims come from at least three shows, at least two positions are held by different people, and the debate has lasted two weeks.
Pairs are matched by content across different episodes and shows; no exchange between these speakers took place unless both quotes come from the same episode.
The prose on this page is written by a model from the quotes shown, and every sentence of it rests on quotes you can open; sentences that could not be traced to a quote were removed before publishing. Positions are placed from each speaker's own words. Evidence labels say what the speaker cited, never whether it is true.
7 episodes behind this page
- 2026-10-12The Peter Attia Drive — #411 ‒ AMA #90: Strong convictions, loosely held: how Peter's views on fasting, keto, metformin, rapamycin, whole-body MRI, and exercise have changed
- 2026-09-25Dr. Jockers Functional Nutrition — The TRUTH About the Carnivore Diet (What They Aren't Telling You!)
- 2026-04-28Dr. Jockers Functional Nutrition — The Gut-Hormone Connection and Women's Health with Cynthia Thurlow
- 2026-04-17Culture Apothecary — Best Anti-Aging Workouts, Seed Oils, Methylene Blue & Mitochondria | Dr. Chris Masterjohn, PhD
- 2025-12-08The Peter Attia Drive — #375 - Ketogenic diet, ketosis & hyperbaric oxygen: metabolic therapies for weight loss, cognition, Alzheimer's & more | Dom D'Agostino, Ph.D.
- 2025-11-24The Diary Of A CEO — Insulin Doctor: This Is The First Sign Of Dementia! The Shocking Link Between Keto & Brain Decline!
- 2025-10-27The Diary Of A CEO — Longevity Debate: The Truth About Weight Loss, Muscle, and Creatine!
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