Carnivore vs Omnivore Part 4. A very friendly debate with Chris Kresser.

PS

Paul Saladino1h 17m · 2020-02-04

Claims Made

129

Claims Supported

69

Support Rate

53%

Support rate

69 of 129 claims supported

69 supported60 partial / not

Claims from this content

91

Well SupportedAn animal-based diet, consisting of organs, grass-fed meat, fruit, honey, and raw dairy, is considered evolutionarily consistent and nutrient-rich.Well SupportedIt is possible to obtain 60 mg of vitamin C daily by eating animal foods nose-to-tail, with liver being richer in vitamin C than muscle meat.Well SupportedAncestral Supplements produces freeze-dried organ meat supplements in convenient gelatin capsules, sourced from grass-fed, grass-finished animals in New Zealand.Well SupportedA vitamin C dose as low as 10 milligrams per day was sufficient to correct scurvy in studies from the 1930s and 40s, with no observed clinical benefit from higher doses.

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A. Volkovreader

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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

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Would love a "what would change this verdict" RSS feed. Sign me up if it exists.

Well Supported

Indigenous cultures like the Inuit historically preferred animal-based diets when possible.

Not SupportedFeeding the global population solely on grains and plant-based foods would lead to widespread micronutrient deficiencies.

Well SupportedIndividuals may become deficient in nutrients like riboflavin, vitamin A, and folate if they exclusively consume muscle meat, highlighting the necessity of organ meats.

Well SupportedHumans require either carbohydrates or fat, as consuming only protein can lead to problems like 'rabbit starvation'.

Well SupportedThe carnivore diet may be helpful for individuals with colitis or Crohn's disease.

Well SupportedIslamic fasting, such as during Ramadan, can lead to an increased abundance of Akkermansia muciniphila and Bacteroides fragilis group.

Well SupportedIndividuals with significant autoimmune disorders or digestion problems may benefit from an elimination diet like a carnivore diet.

Well SupportedA zero-fiber carnivore diet increased gut bacteria diversity significantly within one week and after one year.

Partially SupportedThe Human Microbiome Project revealed significant individuality in gut microbiomes, making universal definitions of a healthy microbiome difficult.

Well SupportedIndividuals on a carnivore diet including organ meats and minimally cooked meats do not appear to have issues with oxidative stress markers.

Well SupportedButyrate is not the only short-chain fatty acid usable by colonic epithelial cells and can be produced in low or zero fiber environments.

Well SupportedRegenerative agriculture practices can result in climate-positive and carbon-negative meat.

Well SupportedGrass-fed desiccated animal organ supplements can preserve nutritional content and improve health.

Well SupportedMulti-year carnivore diet adherents who do not consume organ meats are likely to have multiple vitamin deficiencies.

Well SupportedIndigenous populations like the Tsimane and Hadza historically had very low rates of cardiovascular disease, cancer, dementia, and chronic inflammatory diseases.

Well SupportedPlants contain toxins that can cause negative reactions in some individuals due to co-evolution with animals.

Well SupportedPlant toxins are a greater concern for individuals with autoimmunity, immune dysregulation, or gastrointestinal issues compared to generally healthy individuals.

Well SupportedIncreasing daily vitamin C intake from approximately 70mg to 270mg through fruits and vegetables over 12 weeks did not change antioxidant capacity.

Partially SupportedIn some Asian cultures, meat consumption correlates with affluence and lower rates of breast cancer and heart attacks, suggesting lifestyle factors are influential.

Partially SupportedThe Recommended Dietary Allowance for vitamin C is based on preventing scurvy, not on supporting optimal enzyme activity or antioxidant function.

Partially SupportedA carnivore diet can lead to a negative anti-nuclear antibody (ANA) result and significant clinical symptom improvement.

Partially SupportedA carnivore diet eliminates all plant foods, removing the need for plant-derived nutrients.

Partially SupportedA plant-based diet and a carnivore diet can rapidly alter the gut microbiome within one week.

Well SupportedThe carnivore diet may be beneficial for autoimmune conditions, gut conditions, allergies, asthma, and other immune-related issues.

Not SupportedHumans may not be able to thrive long-term on exclusively plant-based diets without significant synthetic supplementation.

Partially SupportedPlants can be harmful to some individuals, and this is a core consideration of the carnivore diet approach.

Partially SupportedTraditional grass-fed animal fats have an omega-6 to omega-3 ratio of about 1.4:1.

Not SupportedVitamin C intake above 30-70 mg per day may not be optimal for humans and could potentially be dangerous.

Partially SupportedReintroducing plant foods after a period on a carnivore or ketogenic diet can quickly lead to feeling unwell.

Partially SupportedFor individuals with autoimmune disease, a carnivore diet can lead to symptom remission, reduced antibodies, and improved well-being.

Partially SupportedThe carnivore diet has led to improvements in autoimmune disorders, skin health, digestion, and weight loss without significant skin sagging.

Partially SupportedIncluding plant foods for variety, texture, and enjoyment is reasonable, provided attention is paid to the spectrum of plant toxicity.

Partially SupportedEvidence for fiber's benefits is often based on comparisons to standard American diets, and its removal can improve idiopathic constipation.

Partially SupportedThe cheetah microbiome can produce short-chain fatty acids from protein or collagen, suggesting these could be considered 'animal fiber'.

Partially SupportedThere is a lack of long-term population data for individuals who have followed a carnivore diet without issues.

Partially SupportedChecking markers for adequate vitamin C status is challenging.

Partially SupportedThe fatty acid composition of animals can indicate if they are truly grass-finished versus fed grass pellets.

Partially SupportedCarbohydrates are not inherently bad for humans, and some populations thrive on diets including plant foods.

Partially SupportedOvercooking meat or not consuming liver and organ meats can lead to insufficient vitamin C intake.

Partially SupportedThere is limited evidence that fiber is beneficial for preventing diverticulosis or cancer.

Partially SupportedIsobutyrate and butyrate trigger the same receptors in the gut, with isobutyrate potentially triggering them more effectively.

Not SupportedThere is insufficient evidence to support the claim that everyone needs to follow a carnivore diet.

Limited ResearchThe long-term safety and efficacy of a carnivore diet are uncertain.

Partially SupportedPractices that stimulate the parasympathetic nervous system, such as meditation, getting a pet, regular massage, spending time outdoors, and reducing technology use, can improve health.

Partially SupportedMeditation has been a significant part of Chris Kresser's path for almost 30 years, including neuroplasticity-based interventions.

Partially SupportedSome cultures have historically consumed diets that are 90-99% carnivore.

Not SupportedRich Roll's described diet likely provides 40 grams or less of protein daily, which is insufficient for an endurance athlete.

Partially SupportedShort-chain fatty acids like butyrate are important for colonic epithelial cells and have signaling roles.

Partially SupportedGut bacteria can convert protein into short-chain fatty acids.

Partially SupportedThe gut is part of the nervous system and functions as a 'second brain' or enteric nervous system.

Partially SupportedAncestral populations like the Inuit, who consumed up to 95% animal products at times, and equatorial populations with high plant food intake, both appeared to do well without developing common modern chronic diseases like diabetes, heart disease, hypertension, and obesity.

Partially SupportedIndividuals in the type 1 diabetes community who follow vegan diets often use hemp protein and zinc supplements.

Partially SupportedAutoimmune conditions, gut conditions, and immune-related conditions like allergies, asthma, and skin issues are likely to be most impacted by interventions.

Partially SupportedFor individuals with IBS, SIBO, or other GI issues, foods like garlic and onions can cause severe pain and discomfort.

Partially SupportedA diet including both animal products and plants is likely the best dietary approach for most people.

Partially SupportedThe increase in plant consumption near the equator may have been an adaptation to environmental changes caused by human overhunting of megafauna.

Partially SupportedPlant foods may trigger symptoms in individuals on elimination diets.

Not SupportedThe speaker was a raw vegan for seven months, experienced 25-30 pounds of weight loss, and found it unsustainable.

Not SupportedUntruths regarding meat's link to cancer and heart disease are frequently repeated.

Partially SupportedIndoor plants can positively impact the nervous system.

Partially SupportedModern culture has a significant parasympathetic deficiency.

Partially SupportedRemoving fiber for four generations in animal models can lead to the loss of certain gut organisms.

Partially SupportedSpending time in nature may positively affect the gut microbiome and the parasympathetic nervous system.

Partially SupportedA carnivore diet could lead to thriving individuals while those eating plants experience poor health outcomes over 40-50 years.

Not SupportedPoorly constructed carnivore diets may lead to nutrient deficiencies like vitamin C, folate, manganese, and molybdenum.

Partially SupportedWeston Price observed that a tribe consuming more animal products was more robust than the Kikuyu tribe.

Partially SupportedResearchers interpreting changes in the microbiome from ketogenic diets as unfavorable may be referring to a decline in beneficial genera like Lactobacillus or Bifidobacterium.

Partially SupportedSome individuals may achieve a healthy microbiome by avoiding plant foods that cause inflammation or are not tolerated.

Partially SupportedThe human microbiome can shift based on dietary patterns when humans rely on 'fallback foods'.

Partially SupportedNature-connected activities like skiing, hiking, and fishing support the parasympathetic nervous system.

Partially SupportedWhite Oak Pastures produces high-quality meat considered among the best available.

Partially SupportedGastroenteritis can involve bacterial infections causing gut inflammation and prolonged recovery.

Not SupportedEvidence suggests vegan diets are not optimal for humans.

Partially SupportedThe severity and duration of illness are influenced by the interaction between pathogens and an individual's internal ecosystem.

Partially SupportedFecal microbiota transplants have sometimes resulted in negative outcomes, even with donors from indigenous populations or recipients with autism, suggesting potential host ecosystem mismatch.

Partially SupportedChronic sympathetic arousal prevents proper vagus nerve and parasympathetic nervous system signaling for digestive function.

Partially SupportedFor some individuals, focusing on joy, connection with nature, or neuroplasticity-based interventions may be more beneficial than a strict restrictive diet for managing autoimmune conditions.

Partially SupportedLiving in nature, engaging in physical labor, cold water immersion, sun exposure, and sauna use can positively affect the microbiome.

Partially SupportedAthletes on vegan diets often use processed protein powders and vitamin B12 supplements.

Partially SupportedDietary interventions, including the Weston Price approach and removing grains and legumes, were significant for Chris Kresser's recovery.

Limited ResearchFiber consumption benefits may extend beyond short-chain fatty acid production.

Partially SupportedA client experienced persistent gut issues after drinking contaminated water in San Francisco containing fecal coliform and gram-negative bacteria.

Limited ResearchThere are questions regarding vitamin C, folate, and fermentable fiber intake on a carnivore diet.

Partially SupportedA decline in beneficial gut bacteria species may be a more significant dietary shift than an increase in pathogenic species.

Partially SupportedStudies on ketogenic and very low-carb diets have shown microbiome changes interpreted as undesirable due to a potential loss of beneficial bacteria.

Partially SupportedThere are no known ancestral populations that thrived long-term on a vegan diet.

Partially SupportedThe carnivore diet challenges long-held dietary notions.