There are lots of at-home light therapy gadgets that claim to benefit your skin, but they also raise questions: If red LED light boosts hair growth, what happens when you use it on your face? And if blue light may be problematic when it comes from screens, why are blue LED lights used to treat acne? We’re getting to the bottom of things, with help from dermatologist Blair Murphy-Rose, MD. Plus, Jenn tested the Solawave skincare wand with red light therapy and shares her review. Before that, we’ve got lots of beauty news and our favorite skin, hair, and makeup bargains from all the holiday sales.

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