Researchers behind the review said many people may be consuming more protein than their bodies require. WASHINGTON: A review of more than 350 scientific studies suggests that consuming less protein may promote healthier aging and longer lifespan in some people, challenging the growing popularity of high-protein diets. However, researchers behind the review said many people may be consuming more protein than their bodies require, while the benefits of excessive intake may be overstated. The analysis found that moderate protein restriction could improve metabolism, reduce inflammation and cellular damage, and activate biological processes linked to healthy aging. Older adults, athletes and people with certain medical conditions often require higher protein intake, making individualized dietary recommendations essential.