PS Photography | Sarah Wasilak Nordstrom PS Photography | Sarah Wasilak Nordstrom

Forget the year on your birth certificate — many factors can dramatically change how your skin looks and feels. Even if you haven't noticed any signs yet — like dark spots or fine lines — and consider yourself too young to pick up something labeled "antiaging," the truth is that if you're in your 20s, it's not too early to start with preemptive measures. "Antiaging in beauty refers to ingredients such as retinol , peptides , vitamin C, and hyaluronic acid, which help fight signs of sun damage, fine lines, wrinkles, and crepey skin," Arizona-based double board-certified dermatologist Karan Lal, DO, FAAD , tells Popsugar. "We start losing collagen in our 20s and start accumulating sun damage

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