I have even had some people think that its dying their skin which is not true at all.
Sunless tanning products emerged in 1960. The first one, QT or Quick Tanning Lotion, produced a quite non realistic orange color. Since then sunless tanning products (also called self tanners) has evolved tremendously, mainly thanks to the introduction of spray and airbrush tanning. All of the ingredients are dermatologically tested and approved since 1960. The substances are proven harmless. Sunless tanning is not dangerous in any way.
The Ingredients~ The most effective sunless tanning ingredient is DHA (dihydroxyacetone). DHA is a colorless sugar that interacts with dead cells located in the upper layer of the skin (epidermis). As the sugar binds with the dead skin cells, a color change occurs. Erythrulose, also a sugar, is another important substance in the sunless tanning solution. When used in combination with DHA it provides a longer lasting and more natural looking tan than DHA alone. The tan usually lasts five to seven days depending on your skin.
Does The Tan Fade? Just like an ordinary tan achieved thru sunbathing, the sunless tan will fade. The reason is simple: Every day, millions of dead skin cells are sloughed off or worn away from the surface of your skin. In fact, every 35 to 45 days, you have an entirely new outer skin layer (epidermis). This is why the tan will gradually fade. As the dead cells are worn away, so is the tan. Fading of this kind applies to all tans, both sunless and real. To maintain your tan, simply get sprayed 2-3 times a month.