Self tanner products contain dihydroxyacetone (DHA) and erythrulose, which are both safe dyeing ingredients that can help you achieve a healthy glow even in the dead of an Iowa winter.  How does it work?  These agents interact with the proteins in the outermost layer of skin and produce a darker skin color. Within three to seven days after the product has been applied, the cells from the epidermis fall off and your tan will fade.

Read Related: 20 Lies About Sunscreen to Dispel Right Now