Research on protein intake and aging

Scientific research has explored the relationship between protein consumption and longevity. A review of over 350 studies published in Cell Press Blue suggests that reducing protein intake may improve metabolism, reduce cellular damage, and increase life expectancy. Researchers noted that while protein is necessary for active individuals, sedentary populations may consume excess amounts. Biological mechanisms, such as the hormone FGF21, may play a role in boosting energy expenditure and reducing inflammation during protein restriction.

Further research published in Frontiers in Nutrition, involving over 15,000 adults across China, the United Kingdom, and the United States, specifically examined vegetable protein. The study found that higher vegetable protein intake is associated with slower biological aging and a 14% lower risk of sarcopenic obesity. Replacing 5% of daily calories from animal protein with vegetable protein was linked to a 34% reduction in the risk of sarcopenic obesity, though researchers noted that the observational nature of the study prevents definitive claims of causality.