One of the most controversial topics in the professional beauty industry involves a monomer liquid called MMA or methyl methacrylate. Unfortunately, there are many myths and misunderstandings surrounding the use of this ingredient. Most nail technicians know they should not use products containing this ingredient, but they don’t know why! This lack of proper information opens the door for speculation and rumors. Then why should MMA not be used? Hooked on Nails shares the four main reasons why.