Paleo Diet

topic

The Paleolithic dietary approach models eating patterns on presumed ancestral diets before agricultural food production — emphasizing lean meats, fish, eggs, vegetables, fruits, nuts, and seeds while excluding grains, legumes, dairy, processed foods, and refined sugars, based on the evolutionary mismatch hypothesis that modern foods for which humans did not evolve drive chronic disease. It reliably improves metabolic markers in short-term clinical trials primarily through its elimination of ultra-processed foods and refined carbohydrates.

Role

The Paleo diet's primary evidence-based contribution — the elimination of ultra-processed foods, refined sugars, and refined grains — is its most nutritionally defensible feature, and the improvements observed in short-term trials are attributable largely to this elimination rather than to specific inclusion of ancestral foods. Its exclusion of legumes and whole grains — among the most consistently longevity-associated food groups in nutritional epidemiology — based on anti-nutrient concerns that phytate and lectins are addressed by normal cooking represents its primary theoretical weakness. The diet is most productively evaluated not as an archaeologically accurate reconstruction of ancestral eating but as a pragmatic framework for eliminating industrial foods.

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