This article was originally posted in September, 1999.
Creatine is an amino acid that occurs naturally in the human body.
The estimated daily need for creatine in humans is about two grams. The body produces 1-2 grams of creatine each day in the liver, kidneys, and pancreas. Additional dietary sources of creatine, primarily meats and fish, supplement the body's production of creatine. A half-pound steak contains about one gram of creatine. Synthetic creatine is considered a dietary supplement.