Biologique Recherche Lotion P50V
I'd consider Biologique Recherche a holy grail beauty brand. The name can be daunting to pronounce and spell, but the product are anything but. Created by a biologist, a physiotherapist, and a doctor, these products are found in the most luxurious spas in the world (like Ciel Spa at the SLS Hotel in Los Angeles) and are often found at plastic surgery recovery facilities to speed up the healing process.
The product creating the most frenzy is Lotion P50. There are several iterations of this magical lotion, which is really active if applied like a toner. It exfoliates, hydrates the skin, and balances your pH level so your skin isn't over or under-producing oil. It's one of the most potent exfoliating products on the market, and my skin has become smoother and tighter from consistent use. I'm personally a big fan of Lotion P50V ($98). Unfortunately, it's difficult to purchase these products in the U.S. — be prepared to order it directly from spas or studios that carry the line. I'd also be hesitant about ordering the product off Amazon.
Other products to try: Lotion P50 ($98) and Crème Grand Millésime ($675).