The Robb Report explains how a few simple tweaks can help take years off your face.

“Skin regeneration is at its height between 10 p.m. and 2 a.m., so this is the best time to help the skin repair,” says Dr. Dendy Engelman, a board-certified and nationally acclaimed dermatologic surgeon at Medical Dermatology & Cosmetic Surgery in New York City. “During deep sleep, the rise in growth hormones allows damaged cells to become repaired.”