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1. Frequent trims make your hair grow faster.
Cutting the ends of your hair doesn't affect the follicles in your scalp, which determine how fast and how much your hair grows, says Paradi Mirmirani, MD, assistant professor of dermatology at the University of California, San Francisco. Hair grows an average of a quarter-inch every month—whether or not you cut it. Regular trims might make your hair look a little longer, though. Getting rid of split ends reduces hair breakage, and breakage is what makes hair look thinner at the ends (and shorter), says Matt Fugate, a hairstylist at Sally Hershberger Downtown in New York City. Every eight to 12 weeks, ask your stylist to take off the minimum necessary to eliminate split ends.