Vitamin C helps with recovery after a workout, take it with your evening meal. It also helps with collagen production. Just make sure you take a non-acidic form with bioflavonoids. If you take it daily, your immune function will improve. Also very cheap for what it does for you. I know I will get flack for saying this, but pick up a copy of Franco's "the bodybuilders nutrition book". Very good indepth info about vitamins and minerals.