We wouldn't call the Tan Luxe Super Glow Hyaluronic Self-Tan Serum ($49) a self-tanner, necessarily. Rather, it's a brilliant formula that combines all the good stuff you'd want from a hydrating face serum — hyaluronic acid, antioxidants, vitamin E — with a small percentage of DHA, a combination of which had never been done before, until formulators tinkered with the chemical makeup so they wouldn't cancel out the other's effectiveness. It makes it easy to build a believable tan that'll last long after Summer ends.