Hyaluronic acid, which is used to soften and hydrate skin while preventing breakouts, is a super absorbent sponge-like molecule naturally found in the body, says Dr. Sonia Batra, a dermatologist and co-host of The Doctors.This gem keeps your skin moist and, like a good anti-aging cream or face serum, it can help turn back the clock. “As we age, our skin loses moisture and becomes less firm and supple. "Hyaluronic acid is an oil-free ingredient that works to replenish the skin’s moisture as well as plumps and smooths the appearance of fine lines,” Batra explains.