Skim ingredient lists for peptides.
They're one of dermatologists' favorite anti-aging ingredients because they signal skin cells to produce more collagen—the stuff that makes your skin firmer, smoother, more glow-y, and all-around younger-looking. We like the Olay Regenerist line and NuFace Smoother Powerhouse Peptide Serum, since they contain peptides called matrixyl and argireline that have some of the best science behind them, says Jeannette Graf, a dermatologist in Great Neck, New York. Another benefit of peptides? They can make undereye circles less noticeable by thickening collagen in the area (we like Dr. Brandt Triple Peptide Eye Cream).