What exactly is a suntan?
A suntan is caused by an increase in melanin, the pigment in your skin. Melanin gives skin its natural color. The more melanin, the darker the skin’s color. When UV rays contact the skin, a special type of skin cell makes and releases more melanin. This is a defensive response, as melanin can partially protect the skin from some of the harmful effects of the sun. But remember: there’s no such thing as a safe tan! A tan is a sign that some cells in your skin have already been injured by the sun. It’s your skin’s attempt to prevent further damage.
