Nutrition science is limited because real causal experiments are almost impossible.

• Modern nutrition teaching has failed because more than 70% of people are overweight or obese and chronic disease rates are rising.
• Science needs experiments: identical groups, controlled conditions, one variable changed, and observed outcomes.
• In nutrition, lifetime human experiments are blocked by ethics, practicality, and cost, so most nutrition science falls back on inference.
• Mechanistic papers give a proposed pathway and then convert it into cause and effect even though the pathway is not tested in humans.
• Epidemiology and cohort work are retrospective associations for one group under one context, not personal risk calculations for everyone else.
• Conflict of interest matters because science is expensive, funders matter, and researchers rarely bite the hand that feeds them.
• The European LDL and heart-disease consensus panel is an example of researchers aligning with their funding source.
• Consensus is sociology, not science; empirical indication matters more than the most popular expert opinion.
• Climate narratives attached to meat and nutrition are often virtue signaling or grant-friendly storytelling, not nutrition science.

Protein, fat, carbohydrate, and energy:

• After the methods critique, the nutrition rules come from twenty-plus years of research, publishing, clients, clinical practice, and mistakes.
• For the average person, protein intake belongs around 2 to 2.5 g per kg of lean body mass.
• Athletes, including hypertrophy athletes, do not need much more protein because daily or weekly muscle gain is small.
• The best protein source is animal muscle meat because the literature points to higher bioavailability than plant protein.
• The best fats are animal fats because evolution and adaptation point toward animal fat as the normal human energy source.
• Once carbohydrates are removed for a while, appetite can guide fat intake.
• Dietary carbohydrate requirement is zero grams because gluconeogenesis supplies glucose and ketosis works as an energetic signal.
• Homeostasis keeps the internal environment stable across changing conditions.

Common nutrition mistakes:

• Seed oils are not heart healthy; they are high in deuterium, feed inflammatory LOX and COX pathways, and oxidize into damaging compounds such as aldehydes.
• Grains are unnecessary because there is no grain deficiency, and grains contain plant irritants, toxins, and antinutrients.
• Fiber is unnecessary and may be a gut-function problem, not a gut-health requirement.
• The Paul Mason fiber example points to an N = 62 or 63 study where fiber was associated with worse gut function.
• Short-chain fatty acids do not require fiber because ketones and butter can supply that role.
• Phytonutrients are a marketing term, not a human physiological requirement, because there is no phytonutrient deficiency.
• Fruit is unnecessary because there is no fruit deficiency, fiber remains a problem, and fructose can impair liver energy status and promote fatty liver.
• Processed food should be avoided, especially products with long ingredient panels in the middle aisles of supermarkets.

Final diet rule:

• The solution is a species-appropriate, species-specific diet built from genetics, anthropology, and human adaptation.
• The diet is almost entirely muscle meat and associated fat, mainly from ruminant animals, not organs.

References

• [03:36] Low-density lipoproteins cause atherosclerotic cardiovascular disease. 1. Evidence from genetic, epidemiologic, and clinical studies. A consensus statement from the European Atherosclerosis Society Consensus Panel — https://doi.org/10.1093/eurheartj/ehx144
• [10:12] Stopping or reducing dietary fiber intake reduces constipation and its associated symptoms — https://doi.org/10.3748/wjg.v18.i33.4593