Creatine is a naturally occurring compound in the body made from amino acids that supplies energy to muscles. Creatine is also found in meat and fish. The use of creatine supplements by athletes became popular in the 1990s as a way to reportedly enhance athletic performance and build lean muscle mass. Today, creatine remains one of the more widely used supplements by athletes, particularly among adolescents.
Recently, there have been reports of contaminated creatine supplements. Side effects of creatine and interactions with other medications also have been reported. People who are using or are considering using dietary supplements, including creatine, should discuss this decision with their health care provider.
Source: http://nccam.nih.gov/news/2010/082510.htm?nav=rss
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