Cue the Star Wars-style sound effects, because this week's episode is all about lasers. The ones we're talking about can't defeat the dark side, but they can conquer dark spots. And unwanted hair and broken blood vessels and scars. With the help of dermatologist Tina Alster, Michelle and Jenny demystify some of the lasers you may have heard about (like Fraxel), nerd out about how they work, and share the surprising things that happen to your skin following some laser treatments (they speak from experience).

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This episode of Allure: The Science of Beauty is presented by Pantene.