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Rachel Jacoby Zoldan is a beauty, health and lifestyle writer based in New York City. Her work has also appeared Refinery29, Men's Journal, Redbook, SELF, InStyle, HGTV Magazine and the Huffington Post. When she's not writing or editing, she's probably running, taking a yoga class or on a Spin bike somewhere. Thinking about really great leggings. (Also, maybe, the couch, too.)

12 Everyday Habits That Are Wrecking Your Hair and Nails

While seemingly harmless, these habits actually can hurt the health of your nails and hair—but we've got expert solutions to nix 'em.