I’d like to first start with how skin gets darker in the first place. Melanin is produced by specialized cells called melanocytes. The amino acid tyrosine is oxidized by these cells and then polymerized.
Melanogenesis happens to protect skin from UVB rays produced by the sun. Melanin is an effective absorber and diffuser of UVB rays (think of it as a natural sunscreen with an SPF value of about 15). Studies have shown that white skin is 70 times more likely to develop cancer than black skin (Halder, 1995). Continue Reading