Do suntan lotions that dye the skin to simulate a tan give the same sunburn protection as a real tan?
The amount of melanin in our skin is what controls the darkness of it. The darkest Africans have a great deal of melanin in their skin and the lightest Scandinavians have very little. Melanin is a natural protector against damage to the skin from sunburn. When we slowly develop a tan in the summer, we allow the sun’s UV-D rays to stimulate an increase melanin production in our skin, giving it a darker shade and protection against sunburn. The protection comes from the fact that melanin is and electro-conductive molecule that is extremely efficient at absorbing the damaging UV rays from the sun and converting them to harmless heat. It absorbs 99.9% of such rays.
There are tanning lotions that contain iodine and other dyes to artificially produce a tan without exposure to the sun. Does that artificial tan also protect against sunburn, or is it just for looks and is the natural melanin protection the only way to develop sunburn resistance.