Dr. Dennis Gross SpectraLite FaceWare Pro

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The Tone Corrector: LED Light

Here's a bright new concept: Not all helpful ingredients come in a cream. "We've been taught that light negatively affects skin, but LED functions very differently from the UV rays generated by the sun," says Dennis Gross, MD, a dermatologist in New York City. In fact, it's been used for decades to treat chronic skin conditions like psoriasis and eczema—and scientists from major universities are now conducting research on its anti-aging powers. "It's believed that red and blue light penetrate deep into the dermis, stimulating the skin's natural renewal process to improve uneven skin tone and combat dullness, fine lines, wrinkles, and inflammation," Romanowski says. Studies also show it stimulates the natural production of collagen and elastin while increasing circulation and oxygenation. The result: a more fresh-faced you.

Find it in: Dr. Dennis Gross SpectraLite FaceWare Pro ($435; DrDennisGross.com)