Cutting 3 amino acids from diet may extend lifespan, slow aging

A new review suggests that restricting dietary protein and specific amino acids may promote healthy aging and extend lifespan by improving metabolism and reducing cellular damage. The findings challenge current trends recommending higher protein intake. The review, published in Cell Press Blue, analyzed over 350 studies and found that reducing protein helped the body burn more calories, reduced body fat, and improved insulin management. It also activated cellular repair pathways and reduced "zombie" cells, with specific benefits linked to restricting amino acids like isoleucine and methionine. Experts caution that protein needs should be personalized based on age and activity level, as higher intake remains important for muscle maintenance, especially in older adults. The review notes that protein restriction could be contraindicated for those over 65.