If you’ve seen Chelsea Handler’s viral Instagram post of her “before and after” laser treatment, you’re probably already sold on the benefits. With age, collagen production wanes, leading to fine lines and wrinkles, according to the Cleveland Clinic. The result? Revved production of collagen, says Rachel Nazarian, MD, a dermatologist with Schweiger Dermatology Group in New York City, which is confirmed by research. Lasers work in a similar way: They use light and heat energy to cause controlled damage to the surface of the skin, so that your body reacts to heal the tissue by creating new skin. When you work out, you intentionally cause small tears to your muscles, which grow back stronger, research notes. “It does that by creating a controlled injury in the tissue that stimulates the body to have a healing response that makes it look better.” As used in dermatology, a laser is “a skin-resurfacing modality that harnesses the power of light and heat to improve skin tone, texture, and coloration,” says Lara Devgan, MD, a plastic surgeon based in New York City. So what exactly is a laser? The word stands for light amplification by stimulated emission of radiation, according to NASA.
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