In Your 40s
Got a dermatologist you like? "Prescription-strength products are definitely recommended at this stage," says Dr. Alster. Your doctor can guide your transition from an over-the-counter retinol to a stronger, prescription-strength retinoid. Dermatologists also suggest using ingredients such as growth factor and peptides in your 40s, if not earlier.
Olay Regenerist Wrinkle Revolution Complex with biopeptides, $25; drugstore.com