Creatine is a molecule that can rapidly produce energy (ATP) to support cellular function. It also exhibits performance-enhancing and neuroprotective properties. Creatine is well-researched and remarkably safe for most people.

Creatine is a molecule produced in the body. It stores high-energy phosphate groups in the form of phosphocreatine. Phosphocreatine releases energy to aid cellular function during stress. This effect causes strength increases after creatine supplementation, and can also benefit the brain, bones, muscles, and liver. Most of the benefits of creatine are a result of this mechanism.

Creatine can be found in some foods, mostly meat, eggs, and fish. Creatine supplementation confers a variety of health benefits and has neuroprotective and cardioprotective properties. It is often used by athletes to increase both power output and lean mass.

Stomach cramping can occur when creatine is supplemented without sufficient water. Diarrhea and nausea can occur when too much creatine is supplemented at once, in which case doses should be spread out throughout the day and taken with meals.