Creatine is a naturally occurring compound that is found in small amounts in certain foods and is also produced by the body. It is stored in the muscles and used as a source of energy during high-intensity, short-duration exercise. Creatine supplements are widely used by athletes and bodybuilders to increase muscle strength and power.

When taken as a supplement, creatine is converted to phosphocreatine in the body, which then helps to regenerate the body's main energy source, ATP (adenosine triphosphate). This can lead to an increase in muscle strength and power during short-duration, high-intensity exercise such as weightlifting and sprinting.

Additionally, creatine supplementation may also improve muscle mass, endurance, and recovery time after exercise. It may also be beneficial for certain neurological conditions such as Parkinson's disease, Huntington's disease and for older people to boost their muscle mass and strength. However, more research is needed to confirm these potential benefits. Creatine supplementation is considered safe for most people when taken at recommended doses. It is important to note that excessive creatine intake may lead to kidney problems and other side effects.