Unlike a self-tanning lotion, which essentially just stains your skin to give the illusion of a tan, this drug actually goes to work from the inside out, causing the body to boost its production of melanin, which is associated with the darkening of the skin pigment. In other words, it gives you an authentic, beach-earned suntan without requiring a moment under the sun or inside a tanning bed.
Besides providing a cosmetic alternative to subjecting one's skin to cancer-causing UV radiation, the researchers are hopeful the drug can be used to reduce the overall threat of skin cancer in fair-skinned individuals. That's because darker skin pigmentation is also associated with a lower risk of skin cancer. So, if fair-skinned people regularly dose up on the drug to safely darken their skin before heading outside (and also lather themselves in sunscreen, as recommended), their risk of all types of skin cancer could be significantly reduced. Redheads: rejoice!