Experts warn against cutting protein to boost lifespan, especially for seniors

A recent Cell Press Blue review proposed that reducing protein consumption could promote longevity, drawing on over 350 prior studies, many of which involve animal models. Nutrition authorities contend the human relevance is unclear and warn that older adults on low-protein diets face greater risk of frailty, falls and death. They note current U.S. guidelines recommend 1.2-1.6 g/kg body weight, with the RDA set at 0.8 g/kg, and that seniors may require even more protein to counteract age-related muscle loss.

Critics also point out that sedentary people, especially those using GLP-1 medications, could lose lean tissue if protein is cut without reducing calories. The consensus is that protein needs should be individualized, emphasizing functional health over mere lifespan extension.