Human evolution wasn’t fueled by kale smoothies. According to anthropological research, early humans’ brains expanded dramatically after incorporating meat into their diets —dense in calories, iron, B12, and omega-3s—all critical for brain development and function. Fast forward to today… Some modern studies suggest higher rates of depression and anxiety among people on strict vegan or vegetarian diets, often linked to deficiencies in key nutrients like: * Vitamin B12 (supports neurotransmitter f