Spermidine Promotes Melanin Production

Melanin is a pigment that occurs in the hair, skin and iris of the eye. Its biological function is to protect the hair and eyes from sunlight, and to allow hair and skin to obtain its color. Melanocytes is a specialised skin cell responsible for the production of melanin, which decreases as an individual ages. The decrease in melanocytes leads to gray hair and uneven pigmentation.  

A 2021 study has shown that spermidine positively improves the function of melanocytes, which leads to an increase in melanin production. This leads to the preservation of the hairs pigment during maturity, decreasing the occurrence of gray hairs.