Creatine is an amino acid that delivers energy to muscles and is used for enhancing athletic performance in horses. The science behind creatine is quite easy simple: Creatine is stored in muscle tissue, and when the original energy reserves have been used, creatine delivers a new source and level of energy to ensure and promote continued muscle activity. Equine creatine paste also reduces lactic acid production, which improves athletic performance, and helps recovery post-activity.