Nutrition & Diet

Cutting One Amino Acid Extended Male Mouse Lifespan by 23%

Researchers at the University of Wisconsin-Madison found that restricting a single amino acid — valine — produced striking longevity and health benefits in mice. Valine is one of three branched-chain amino acids (BCAAs) found abundantly in meat, dairy, and eggs. Mice fed a valine-restricted diet showed improved body composition, better blood sugar control, reduced frailty, lower cancer rates, and fewer senescent ('zombie') cells. Male mice lived 23% longer on average. Benefits extended to both sexes for most health measures, though the lifespan extension was seen only in males. The researchers traced part of the effect to enhanced mitochondrial function in the liver. These findings suggest that dietary interventions targeting valine specifically — or drugs that mimic its restriction — could be a viable strategy for combating aging and age-related diseases in humans.