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 ...

“Dark spots occur when the skin produces excess melanin, the natural brown pigment that gives our skin color,” says board-certified dermatologist Dr. Michele Green. “The exact reason why ...

Sitting for an extended amount of time can cause poor blood circulation and ... People tan in the sun because melanin, a ...