"MMA is methyl methacrylate, a chemical compound that was banned by the FDA in the 1970s for use in nail enhancements due to its potential health hazards," Hanna says.

Many manicure enthusiasts with pseudo-psoriatic nails test positive for allergy to methyl methacrylate. In some cases the allergy can be so severe that it causes the permanent loss of fingernails.

Methyl methacrylate 1 (MMA) is an unsaturated ester that is used to make polymers that range from water-based latexes to clear plastics. On March 24, 2023, MMA and two other latex monomers, butyl ...

BBC Inside Out has discovered that many budget nail salons are using methyl methacrylate (MMA) which can cause permanent nail damage and severe allergic reactions.