"Melanin pigment" refers to a substance produced by our bodies that gives color to our hair, skin, and eyes. It is responsible for determining our skin tone, hair color, and eye color. Full definition
The skin colour or complexion is directly proportional to the amount of melanin pigment produced by the melanocytes. (drhomeo.com)
This gene, which controls the amount of melanin pigment produced, accounts for about 74 percent of the total variation in people's eye color. (discovermagazine.com)
They then measured levels of glutathione (a key antioxidant), oxidative stress and DNA damage in the blood samples, and levels of melanin pigments in the feathers. (sciencedaily.com)