Better Skin at Every Age

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Your 20s

"Fighting acne is usually the number-one priority," Dr. Kleinsmith says. Look for a water-based, oil-free lotion or gel with salicylic acid.

What to pick: Try Philosophy Clear Days Ahead Oil-Free Salicylic Acid Acne Treatment and Moisturizer ($39; philosophy.com).

Next: Your skin in your 20s