Nora Gedgaudas on Ancestral Nutrition and Debunking "Healthy" Food Myths

Shifting to an Ancestral Diet

• 💡 Transitioning to an ancestral diet involves eliminating sugary and starchy foods.
• 🌱 While not strictly required, fibrous vegetables and greens can support healthy gut bacteria, though tolerance varies.
• 🥩 Animal connective tissues can also serve as a fermentative base, potentially more effectively than plant fibers.

The Importance of Dietary Diversity

• 🧠 A diverse diet, including fibrous vegetables and greens (as tolerated), supports a more diverse and robust microbiome.
• 🛡️ A diverse microbiome is crucial for resilient immune function, which is constantly under attack.
• 🍖 Dietary diversity within animal-source foods, such as consuming organ meats and glands (nose-to-tail), is also vital.

Nutrient Powerhouses: Liver and Fats

• 🌟 Liver is highlighted as a superior superfood due to its incredible nutrient density, essential for immune systems, brains, and organs.
• 🥩 The diet advocated is not high-protein but emphasizes protein moderation and deriving most calories from naturally occurring fats.
• 🍳 Animal fats like duck fat, tallow, and lard are preferred cooking fats over plant-based oils like avocado or olive oil, which have lower smoke points and fewer beneficial nutrients.

Understanding Animal Fats and Fat-Soluble Vitamins

• 📊 Even grass-fed steak is over 50% unsaturated fat, primarily monounsaturated, with saturated fat playing a protective role against oxidation.
• 🍊 True Vitamin A (retinol), crucial for immune systems, lungs, and skin, is exclusively found in animal-origin foods, with liver being the richest source.
• ☀️ The "three amigos" of fat-soluble nutrients are Vitamin A (retinol), Vitamin D3 (cholecalciferol), and Vitamin K2 (MK4).

Vitamin K2 MK4 vs. MK7

• 🐖 Pastured pork fat is a rich source of Vitamin D3, and lard is considered a health food.
• 🧠 Vitamin K2 MK4 is the only form recognized by the human brain and is essential for fetal development.
• ⚠️ Supplements often contain MK7, derived from fermented soy (natto), which the body may not recognize or utilize effectively, leading to potential calcification issues if calcium absorption isn't properly directed.
• ❌ MK7 is not found in our evolutionary history, and claims of conversion from MK7 to MK4 are questioned.

Plant-Based Nutrients vs. Animal Sources

• ⚠️ Plant-based sources like beta-carotene are not true Vitamin A and require significant conversion, often insufficient for human needs.
• 🐟 Similarly, plant-based omega-3s (ALA) require a complex conversion process, with many individuals unable to efficiently produce EPA and DHA.
• 🚫 Humans lack the digestive system of ruminants or primates to efficiently extract nutrients from plants; our digestive system is only about 20% devoted to fermentation, primarily for colon health.

Fat as Primary Fuel

• 🚀 Large animals, including humans, are designed to rely on fat as a primary fuel source.
• 🧠 The brain has a significant metabolic demand (25% of calories in adults), and relying on glucose (metabolic kindling) is inefficient and volatile compared to free fatty acids and ketones.
• 🪵 Using fat (like a large log on a fire) provides sustained energy and mental clarity, unlike the rapid, volatile burning of glucose (like kindling).
• ⚡ Glucose is best suited as emergency "rocket fuel" for acute stress, not for daily metabolic needs.