How does laser works? Lasers work by generating a single wavelength of light that’s absorbed only by a single pigment. Some wavelengths target the red color of acne scars, broken capillaries and blood vessels. Others hone in on melanin, the brown-ish pigment in hair and skin, so they can both zap dark marks and remove unwanted hair. To minimize wrinkles, some lasers are absorbed by water, which precisely wounds the skin, generates new collagen, and leaves fine lines much less visible. (This process is known generally as skin resurfacing.)
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