Red Meat’s Role Shifts Over Three Million Years

Why this is here: Humans lost the ability to produce N-glycolylneuraminic acid (Neu5Gc) approximately two million years ago, yet this molecule remains abundant in red meat and can trigger an inflammatory response when consumed.

Researchers at the University of Chicago synthesize three million years of hominin diets with current health data. They argue red meat, once vital for human evolution, now poses threats to health and sustainability. Early hominins valued fatty tissues and organs for calories and essential lipids, especially to support infant brain development.

The review challenges the idea that lean meat drove brain expansion, suggesting a diverse diet was key. Agriculture, beginning 10,000 to 12,000 years ago, reduced dietary variety and increased iron deficiencies. Today, the $1.3 trillion global meat industry links to cardiovascular disease, diabetes, cancer, and mortality.

Humans lack an enzyme to process a sugar in red meat, potentially causing chronic inflammation. Industrial livestock production contributes roughly 15% of global greenhouse gas emissions and drives deforestation. The authors emphasize that modern consumption differs greatly from ancestral patterns, but do not advocate eliminating red meat entirely.