What it is: Caudalie Polyphenol C15 Anti-Wrinkle Defense Serum, $62What it does: Blocks 100 percent of skin-damaging free radicals to correct and prevent wrinkles.How it works: Polyphenols are amazing molecules extracted from plants that are the gold standard for protecting skin from oxidative stress, which is responsible for four out of five wrinkles. Caudalie’s exclusive grapeseed polyphenols (extracted from fresh grapes grown by French vineyards) were shown in a clinical trial to be 10,000 times more effective than the industry benchmark vitamin E. Sounds great on its own, but Caudalie discovered that when their polyphenols are paired with vitamin C, the youth-preserving capabilities of both ingredients are intensified and work even better.Anti-Wrinkle Defense Serum has the highest concentration of this mega-potent, wrinkle-reducing cocktail, in addition to hyaluronic acid and olive squalane to plump and smooth the skin. When used every day, skin benefits from round-the-clock antioxidant protection and your complexion will be smoother, brighter and younger-looking.Why you care: Oxidative stress can start to show up in the form of forehead lines and crow’s feet by age 30, and it becomes harder for the skin to bounce back from long nights, junk food, and just life. But there’s no reason you can’t fight the good fight and come out ahead.