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3. Play Defense
Radiant skin is well-moisturized skin. In the morning after you've applied a serum and in the evening after exfoliation, layer on a moisturizer that contains glycerin (another humectant that attracts water to the skin), dimethicone (a silicone that forms a barrier to prevent moisture from escaping), and hyaluronic acid. "The thicker the moisturizer, the more hydrating it's likely to be," says Gohara. So if your skin still feels dry after you use a lotion, graduate to a heavier cream; if you need even more hydration, try a layer of facial oil first. And remember to apply an SPF 30 sunscreen every day.

Maintain your results by sticking to this routine. "People underestimate the power of consistency," says Gohara. "But you'll see. Discipline pays off!"