Bioavailability of Food; You Are NOT Getting the Protein You Think You Are From Plants!
This is an interview episode hosted by Simon Lewis, featuring Dr. Anthony Chaffee in the Plant-Free MD series. The conversation centers on nutrient bioavailability, exposing how the nutritional content listed on plant-based food labels is almost entirely misleading. Listeners learn that the measured amounts of protein and iron in plant foods bear little resemblance to what the body actually absorbs, with the gap between labeled nutrition and usable nutrition being far larger than most people realize.
A significant portion of the episode unpacks how crude protein measurement works, and why it is fundamentally flawed when applied to plant foods. Because labs measure total nitrogen rather than actual amino acid content, plant-based protein figures are inflated by default. Wheat compounds the problem further: 80 percent of its protein is gluten, which the human body cannot break down into usable amino acids at all. On top of that, plants contain protease inhibitors that actively block the enzymes responsible for digesting whatever protein remains, creating compounding layers of nutritional loss.
Dr. Anthony Chaffee also dismantles the widespread belief that fiber is beneficial or necessary. He explains that fiber cannot be absorbed, physically blocks enzyme access to nutrients, and causes microabrasions to the gut lining. Crucially, he points out that the butyrate fiber advocates claim it produces for gut health is actually a ketone body produced in abundance on a carnivore diet, making fiber entirely redundant for those eating meat and fat. The episode also covers fat-soluble vitamins such as vitamin D, explaining why eating lean meat without fat leaves people deficient, and why adequate sun exposure (without sunscreen chemicals) matters more than most doctors acknowledge.
The conversation closes with practical guidance on cost and food choices, making the case that carnivore eating is genuinely affordable. Ground beef, eggs, bacon, and less glamorous cuts like brisket and chuck deliver equivalent nutrition to expensive cuts, while pound-for-pound comparisons show that spinach and other plant staples are neither cheaper nor more nutritious than animal foods. Listeners come away with a clear framework for evaluating nutritional claims on food labels and a concrete understanding of why animal foods outperform plants at every level of the digestive process.
Key Takeaways
- Assume that plant-based protein labels overstate usable protein significantly: 80 percent of wheat protein is gluten, which the human body cannot digest into amino acids at all, leaving only a fraction of labeled protein actually available.
- Recognize that 'crude protein' on food labels measures total nitrogen, not actual amino acid content, meaning plant-based products like soy drinks may contain far less real protein than stated, while animal meat measurements are far more accurate.
- Avoid relying on plant iron sources: iron in fortified cereals is often literal iron filings, not heme iron, and is poorly absorbed. Heme iron from animal blood and meat is the bioavailable form humans are built to use, with no high-level evidence linking it to harm.
- Eliminate fiber as a dietary requirement: fiber cannot be absorbed, physically blocks enzyme access to nutrients, damages the gut lining through microabrasions, and the butyrate it produces for gut cells is already generated in abundance through ketosis on a carnivore diet.
- Eat the fat alongside meat to access fat-soluble vitamins including retinol, vitamin D, and vitamin E, which are stored in animal fat and absent from lean muscle meat alone. Butter is also a direct dietary source of butyrate.
- Allow at least 6 hours after sun exposure before showering to permit vitamin D to absorb through the skin, and avoid sunscreens above SPF 15, which deliver minimal additional UV protection while introducing significantly higher chemical loads into the body.
- Build an affordable carnivore diet around ground beef, eggs, bacon, and inexpensive cuts like brisket and chuck. These provide equivalent nutrition to premium cuts at a fraction of the cost, and a pound of ground beef can cover a full day of nutrition for a moderately active person.
- Treat TMAO concerns as unsupported by high-level evidence: meat is largely digested and absorbed in the small intestine before reaching the colon, and carnivore-adapted gut bacteria actively consume TMAO, making the proposed mechanism from plant-heavy diet research largely irrelevant for meat-based eaters.
- Bioavailability of Nutrients: Why Meat Beats Plants Every Time
- Heme Iron vs Plant Iron: Why Iron Filings in Cereal Are Useless
- Crude Protein vs Real Protein: Why Gluten Makes 80% of Wheat Protein Unusable
- Protease Inhibitors, Fiber, and TMAO: How Plants Block Nutrient Absorption
- Nutrients Missing from Plants: Choline, B12, DHA, EPA and Fat-Soluble Vitamins
- Butyrate, Ketosis and Gut Health: Why Carnivore Replaces Fiber for Enterocytes
- Fat-Soluble Vitamins, Vitamin D, and Why Sunscreen May Be Harming You
- Seed Oils, Omega-6 Inflammation, and Sun Sensitivity on Carnivore
- What Dr. Chaffee Eats: Ribeye, Ground Beef, Bacon, Eggs and Dairy as Condiment
- Carnivore Diet Affordability: Ground Beef, Eggs, and Pemmican vs Expensive Superfoods
- Meat vs Plants for Brain Health, Mental Clarity, and Longevity
This is an auto-generated transcript from YouTube and may contain errors or inaccuracies.