(CNN) – A new study is linking the use of six muscle-building supplements to symptoms of body dysmorphia in teens. The study author found that substances like whey protein powder, creatine products ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." There are about as many performance supplements on the market as there are protein-packed foods in a WH ...

Want to put on muscle? Who wouldn’t: It keeps you strong enough to do the things you love now, and it’s a great investment for later, since muscle improves bone mineral density and mobility as you age ...