New oils have shed their heavy, greasy image and have emerged onto store shelves as new ways to clean the face, protect hair and nails and make skin healthier. "We've been trained to think of oil as heavy or thick or bad," says Terry Darland, president of Christian Dior Perfumes North America. "But actually, they are very, very light." Companies ranging from L'Oréal Paris to Seventh Generation are marketing quick-absorbing oils that are designed not to clog pores.

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