Lifespan

Low-protein diets appear to have incredible benefits for the health and lifespans of rodents, fruit flies, and yeast.A new study in mice has now identified a single hormone that is essential for these curious anti-aging effects.  The hormone is called fibroblast growth factor 21 (FGF21), and it is secreted by the liver.In recent years, studies have shown that FGF21 responds to protein restriction in male mice, improving energy expenditure and glucose tolerance while reducing body weight.Now, the same team of researchers…