If you, like thousands of other nail enthusiasts, get a lot of nail inspiration from social media, then it’s likely you’ve come across a post warning you of the dangers of using MMA, or methyl methacrylate, in your manicures. “They’re no good for your nails long-term,” one TikTok user said. “It’s very illegal,” said another. Still, it is highly likely that you’ll encounter the use of MMA at your local nail salon despite the ingredient’s bad reputation. But what exactly is MMA, and why is it still being used? Experts Featured in This Article Mazz Hanna is the CEO of Nailing Hollywood. Julie Kandalec is a celebrity manicurist who’s worked…