Why Do People Tan in the First Place? Tanning is the process where the light hits the skin and creates a darkening reaction. The most common response to UV exposure is tanning. Tanning occurs when the skin produces melanin, which is a brown or black pigment that helps protect the skin from the sun. The more melanin in your skin, the darker your skin will be. Some people tan because they think it makes them look healthier or more attractive. Others tan because they think it will help protect them from the sun's harmful UV rays. Tanning does provide some...