Seeing as you need to leave time for cells to activate and regenerate after use, using a derma roller every day would be counterintuitive. Ultimately, the regularity depends on the size of needles. There’s no harm in using a non-intrusive derma roller daily, while one with needles of up to 0.5mm could be used every other day. Anything upwards of 1mm should be restricted to around fortnightly, when skin feels completely recovered. How should I keep my derma roller clean? For more fashion, grooming and technology releases delivered straight to your inbox, sign up for our GQ Recommends newsletter. Shop GQ's edit of the best derma rollers to buy… On paper, rolling tiny needles over your face hardly seems conducive to flawless skin. But there are plenty of reasons why derma rollers live up to the hype bestowed by those most militant about their grooming ritual. From the reduced appearance of scars and fine lines to the better absorption of those products already in your skincare line-up, and, yes, even hair growth, here’s what you ought to know… How does a derma roller work?

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The varying size of the needles on your derma roller will be better suited for different skin goals. Smaller needles of 0.25 to 0.5mm tend to be the standard, used to treat enlarged pores, hyperpigmentation, uneven skin tone and wrinkles. If you’re looking to reduce the appearance of scars from acne or otherwise, or to encourage hair or beard growth, needles upwards of 1mm are better suited to the task. How often should I use a derma roller?