BLACK or brown pigments are widespread among animals. Although they have been widely assumed to be melanin, they have not always proved to be so 1. Their ubiquity is manifest in another way ...
Yale biophysicist Douglas Brash and his colleagues were doing time course experiments after irradiating murine melanocytes—the cells in the skin that produce melanin pigments and in which most ...
This darkening is due to excess production of melanin — the pigment that controls skin color. Hyperpigmentation is common, especially if you have darker skin. Acne, hormonal changes, aging ...