L-carnosine is a compound made of two amino acids, beta-alanine and histidine. L-carnosine is highly concentrated in muscle and brain tissues and is found only in meat sources. L-carnosine may have activity as a free-radical scavenger. N-acetyl L-carnosine is a naturally occurring form of L-carnosine that is resistant to degradation (being broken apart into its constituent amino acids). This form of L-carnosine may be particularly active in the eyes. L-Carnosine Benefits L-carnosine supports the eyes, provides energy, promotes heart health, supports the kidneys, and contributes to healthy skin. ? PROMOTES HEART HEALTH – N-Acetyl L-Carnosine may help support heart health by protecting the heart from free radicals and supporting healthy cholesterol levels.