Carnosine is an amino acid with antioxidant properties that keep healthy cells protected from damage by harmful free radicals.Carnosine is an amino acid that possesses the properties of a strong antioxidant that protects against free radicals. It can reduce the level of lactic acid that collects in muscle tissue, thereby reducing the amount of damage done to muscle tissue over time. Indirectly, this can influence the ability of athletes to perform more effectively.