Maintaining muscle mass into your later years is a key factor in longevity and quality of life, and it seems that everyone’s favorite supplement can help this process. Muscle-promoting creatine, long thought to be the most effective bodybuilding supplement in history, might actually help you live longer. German researchers gave one group of mice creatine with their meals and another group was given food without creatine. The critters who ate creatine lived almost 10 percent longer than the others. The creatine mice were also more active into their late age and seemed to have better mental capacity. Since creatine has an impressive and lengthy track record of safety, scientists are excited about its potential to extend healthy human aging.