
L-Carnosine, or β-alanyl-L-histidine, is a crystalline solid dipeptide composed of two amino acids, β-alanine and L-histidine. Muscle and brain tissues contain high concentrations of carnosine. Carnosine was discovered along with carnitine by the Russian chemist Gulevich.
L-carnosine
CAS number 305-84-0
Molecular weight 226.232
Density 1.4±0.1 g/cm3
Boiling point 656.2±55.0 °C at 760 mmHg
Molecular formula C9H14N4O3
Melting point 253 °C (dec.)(lit.)
Flash point 350.7±31.5 °C

Carnosine has a variety of functions and effects, specifically as follows:
1. Antioxidant:
Carnosine has a strong antioxidant ability, which can remove reactive oxygen species formed by excessive oxidation of fatty acids in cell membrane during oxidative stress, and protect cells from free radical damage.
2. Anti-saccharification:
L-carnosine can react with sugar instead of protein, thereby restoring skin elasticity and brightening skin tone.
3. Anti-blue light:
L-carnosine has an inhibitory effect on pigmentation caused by visible light and helps to resist the damage of blue light to the skin .
4.Balanced configuration of nutrients:
In skin care products, carnosine can promote the normal basic metabolism of facial skin, enrich facial skin, and affect the luster and appearance of facial skin.
5. Immune regulation:
Carnosine also has the role of immune regulation, can regulate the hyperimmune or immunocompromised diseases.

