Protein restriction may promote healthy aging

A comprehensive scientific review published in the journal Cell Press Blue on July 31, 2026, examined over 350 studies on protein restriction and aging. Led by Dudley Lamming of the United States — University of Wisconsin System Board of Regents, the review suggests that consuming less protein, or fewer specific amino acids such as methionine, isoleucine, and valine, may slow aging by improving metabolism, reducing cellular damage, and preserving healthy cell function. The review highlights the hormone FGF21, which rises when protein intake is low and may increase energy expenditure and improve blood sugar control. While acknowledging that active individuals and certain populations like older adults, pregnant women, and those recovering from illness may need more protein, the authors argue that many sedentary adults consume more protein than necessary, potentially leading to negative health consequences. The findings challenge the prevailing 'more is better' protein messaging and the recent increase in recommended daily protein intake by US authorities. Industry experts quoted in the articles caution against overinterpreting the results, emphasizing the importance of exercise and individualized protein needs, and noting that much of the evidence comes from animal studies.