The dipeptide l-carnosine is a well-known neuropeptide consisting of alanine and histidine (beta-alanyl-L-histidine). It is normally made in the human body and is found at high levels in brain, innervated tissues, the lens of the eye, and skeletal muscle tissue.
L-carnosine protects cells against oxidative stress and increases their resistance against functional exhaustion and accumulation of senile features.
Age-related conditions for which l-carnosine may be useful include neurological degeneration, cellular senescence, cross-linking of skin collagen and of the eye lens, muscle atrophy, brain circulation deficit, LDL cholesterol oxidation, and DNA damage.
L-carnosine is non-toxic and is normally contained in meats in the diet.