Which of the following is a prohibited product for cosmetologists?

Methyl Methacrylate (MMA) liquid monomers are considered a prohibited product for cosmetologists due to the health risks and safety concerns associated with their use. MMA can cause severe allergic reactions, skin irritation, and can potentially harm both the cosmetologist and their clients. In Texas, the Texas Department of Licensing and Regulation (TDLR) strictly regulates the types of products that can be used in cosmetology practices to ensure the safety and well-being of both practitioners and clients. The prohibition of MMA is in place to prevent any adverse effects that could arise from its application in nail services.

In contrast, the other products listed, such as water-based nail polish, regular soap, and conditioners, are generally recognized as safe for use in cosmetology. There are no significant health hazards associated with these items, and they can be used effectively and safely in cosmetic procedures.