 [ Symptoms ] at what age is it appropriate to use whey protein in weight training  my grandson is almost 14 and has started weight training at school for football he believes that whey protein will improve his muscular strength more rapidly is it safe at his age to use these products or should he just continue with a balanced diet with added foods containing protein will he be at greater risk of trying something stronger if the whey protein does not have some positive effect for him [ Disease ] there is no whey that this added protein alone will build muscle extra protein    above and beyond his nutritional needs    has the potential of overloading his kidneys especially if he is sweating and exercising and not getting in sufficient water all he needs to do is eat a good balanced diet three meals and some healthy snacks work out regularly no power lifting weights  and he will get stronger and leaner he does not need something stronger like those bulk builders at the health food stores