When you buy through links on this page, HuffPost may earn a commission that helps support our journalism. Every product is handpicked by the HuffPost Shopping team, and prices and availability are subject to change. If you’re a person of a certain age, you likely have a stash of your favorite anti-aging products in your beauty arsenal. Hydrating eye cream, retinol serums, collagen night creams — you’re familiar. But one area you may be overlooking is your lips. Lips become thinner as we get