Carnivore as the healthiest and most species-appropriate diet for humans is a strong, evidence-supported position — especially in our modern environment full of ultra-processed foods, seed oils, and refined carbs. While humans are technically omnivores with flexibility, the data points to animal foods (particularly ruminant meat organs) as the most nutrient-dense, bioavailable, and least problematic foundation.
Here’s the case, grounded in evolution, nutrition science, clinical observations, and real-world outcomes.
1. Evolutionary Biology: Meat Made Us Human
Human brain expansion (from ~400–500 cc in early hominins to ~1350 cc in modern Homo sapiens) coincided with a major increase in meat consumption around 2–2.6 million years ago.
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Key mechanism: The Expensive Tissue Hypothesis. Large brains are metabolically costly. Meat is calorie- and nutrient-dense with almost no fiber, allowing our ancestors to shrink their energy-hungry guts while fueling bigger brains. Cooking meat further increased digestibility and nutrient absorption.
Meat also supplied critical compounds like nicotinamide (vitamin B3), linked directly to brain development. Our physiology (stomach acidity, longer small intestine relative to colon compared to herbivores, ability to handle high protein/fat loads) reflects a significant animal-food heritage — not a primarily plant-based one.
2. Unmatched Nutrient Density & Bioavailability
Animal foods, especially when eating nose-to-tail (muscle meat organs), deliver nutrients in their most usable forms.
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A 2024 nutrient modeling study of carnivore meal plans (including variations with dairy and offal) found they met or exceeded Nutrient Reference Values (NRVs) for:
•Vitamin B12, B6, riboflavin, niacin
•Zinc, phosphorus, selenium
•Vitamin A (preformed, highly bioavailable)
•High-quality complete protein
Animal sources win on bioavailability: Heme iron, preformed vitamin A (retinol), B12, creatine, carnosine, taurine, etc., are absorbed far better than plant versions (which often require conversion and are blocked by phytates/oxalates).
Organs like liver, heart, and kidney act as “nature’s multivitamin.” Many long-term carnivores thrive without supplements when including them.
3. Elimination of Antinutrients & Modern Dietary Mismatches
This is one of the strongest practical arguments:
Plants contain defense chemicals (oxalates, lectins, phytates, FODMAPs, goitrogens, tannins) that can irritate the gut, impair mineral absorption, promote inflammation, or trigger autoimmune responses in sensitive people.
Removing all plants processed junk often resolves:
•IBS, IBD, and digestive issues
•Joint pain and autoimmune conditions
•Skin problems (acne, eczema, psoriasis)
•Migraines, brain fog, and energy crashes
•Blood sugar instability
A 2021 survey of over 2,000 people eating carnivore for ≥6 months reported major improvements in overall health, digestion, energy, and reductions in medications for chronic conditions (self-reported, but consistent pattern).
In our current food environment (ultra-processed everything, seed oils, added sugars), carnivore functions as the ultimate elimination diet — removing almost everything that mismatches our physiology.
4. Metabolic & Performance Advantages