The skin’s ability to slough off dead cells slows down considerably once you hit the big 3-0. After that, you need to help it along. “Regular exfoliation eliminates the layer of dead skin cells that accumulate over time, revealing fresher, more supple-looking skin,” says Dr. Chasin. “Exfoliating also allows topical products such as retinoids and moisturizers to be better absorbed by the skin.” Choose between chemical exfoliants, like salicylic or glycolic acid, or a mechanical one, like a granular scrub. Apply it to clean, damp skin using gentle circular motions with your fingertips.