Creatine is a naturally occurring acid that aids energy production in cells. People commonly take creatine supplements to aid muscular performance in intense exercise, but it can also have several ...

Creatine monohydrate is the most widely used, recommended, and studied form of creatine. Other types include creatine ethyl ester, hydrochloride, and magnesium creatine, but less research supports ...

Large reviews in healthy adults show no clear kidney damage when creatine is used at recommended doses-often 3 to 5 grams a day-for several years. The quiet danger is in people who already have ...