The night before the 1999 UEFA Cup Final, a video tape was released which showed Cannavaro being injected with a substance. The substance was found to be neoton (phosphocreatine), which is used in cardiac surgery to protect the heart during periods of anoxia and stress. It is not on the banned substance list. This chemical is, in partnership with adenosine triphosphate (ATP), fundamental to the ability of the body to produce muscular energy. Phosphocreatine is formed naturally within the body, with over 95% of the compound stored within the muscle cells. The body also receives dietary creatine primarily through the consumption of meat. No action was ever taken regarding this incident.