For those looking to improve the look of scars, boost collagen, or encourage hair growth, microneedling can offer a minimally invasive solution. The practice dates back to 1995, but has gained significant traction in recent years thanks to new technology—and YouTube and Instagram, where the mesmerizing (albeit bloody) process stars in tens of thousands of videos. Here, dermatologist Macrene Alexiades , MD, PhD, who has published extensive research on microneedling, along with fellow Yale clinical professor and dermatologist Mona Gohara , MD demystify the multi-purpose treatment. Microneedling creates microscopic punctures in the skin. Simply put, microneedling is the insertion of very fine short needles into the skin for the purposes of rejuvenation, explains Macrene. The most popular (and cost effective) microneedling device, known as a dermaroller , is made up of micro-fine needles that range in diameter from 0.5 and 2.5 millimeters. But, if the prospect of multiple needle wounds s...
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