Why does your body tan?

Tanning begins as soon as you step out into the sun. UV rays hit your skin and start to break down the DNA in your. In order for the body to protect itself to prevent further damage to your body, it starts to produce melanin. The more melanin in your body, the darker the body becomes and the more protected you are from the sun. So someone who has spent a lot of time in the sun can stand out in the sun for longer periods of time without the risk of sunburn. A suntan needs to be gradual, so it is better to tan for only a little bit at a time and with the right sort of protection like using sunscreen.