India, Jan. 12 -- As global conversations around food shift from weight loss to longevity, the US has unveiled a radical rethink of what 'healthy eating' looks like. On January 7, the US Departments of Health and Human Services (HHS) and the US Department of Agriculture (USDA) released the 2025-2030 Dietary Guidelines for Americans, introducing an inverted food pyramid that prioritises protein and dairy while urging people to avoid ultra-processed foods. Reacting on Instagram, tech entrepreneur and longevity enthusiast Bryan Johnson called it "a significant upgrade," especially praising the move away from processed starches and added sugars, while proposing a few 'longevity-focused tweaks' to the new model. Bryan argued that dairy should be lower on the inverted pyramid, especially for adults. He said milk proteins are high in Branched-Chain Amino Acids (BCAAs), linked to metabolic disease, cancer growth, and mTOR overactivation. He also warned that high intake may contribute to inflammation, poor glucose control, and weight gain. Bryan also stressed the American Heart Association's recommendation to limit them to 5-6% of daily energy, particularly for adults, post-menopausal women, and groups at high risk of cardiovascular disease. "Plant-based protein has been associated with better health and longevity outcomes in several large population studies across various societies, including the US," he stated, adding, "Legume fibre has health-promoting qualities, including the reduction of colon cancer risk." Meat belongs on the inverted pyramid but not at the top and may even be optional for adult men. Citing population studies, he noted that red meat is linked to higher chronic disease and mortality risk. Healthy fats such as cold-pressed oils, nuts, fatty fish, along with legumes and vegetables should top the inverted food pyramid. He highlighted MUFA-rich foods such as olive oil, avocados and macadamia nuts for lowering heart disease risk, and omega-3-rich fatty fish and walnuts for reducing inflammation, cholesterol and biological ageing....