Firm Sagging Skin
You need the one-two punch of retinoids to help build new collagen, and antioxidants to stop the deterioration of the collagen you've still got. "Apply a prescription-strength retinoid [like Retin-A or Renova] at least twice a week, or use a less potent OTC formula more frequently," suggests Shamban. Also, use a moisturizer with antioxidants both morning and night. (Put it on top of your retinoid.) "Antioxidants like green tea, vitamin C, and resveratrol quell free radicals that would otherwise destroy skin's collagen. They also help new collagen form in a protected environment." But have patience. "It takes three to eight weeks for these topical ingredients to have an effect," says Marmur. "It's like maneuvering a cruise ship—after you make a methodical shift in your habits, it takes a while to change course." For instant (if temporary) gratification, topical ingredients like caffeine, polymers, and acrylates tighten the surface of the skin.
AmorePacific Time Response Intensive Skin Renewal Ampoule Set, $550.