Look at any pure creatine monohydrate (not the ethyl ester or hydrochloride forms) from a reputable supplier. It can cause stomach upsets in some people, but 5

Look at any pure creatine monohydrate (not the ethyl ester or hydrochloride forms) from a reputable supplier. It can cause stomach upsets in some people, but 5 grams once/day is generally well-tolerated and a sufficient dose for almost everyone. Don't expect miracles, but there is good-quality evidence for a marginal increase in sports performance in many situations, for many participants.