What are HEMA and HPMA? Why do you avoid using these ingredients?Updated 2 months ago

HEMA (Hydroxyethyl Methacrylate) and HPMA (Hydroxypropyl Methacrylate) are monomer acrylates commonly used in LED gel nail polishes. They are highly reactive compounds that are activated and linked together by LED light to form a long, plastic-like polymer chain on the nail plate. The prefix “mono” stands for one unit, and “poly” means many—so a polymer consists of an infinite number of monomers. HEMA and HPMA are responsible for creating a durable, flexible, and resilient film with a glossy finish.

However, due to their high reactivity and small molecular size, they can penetrate the skin and cause allergic reactions such as contact dermatitis and irritation. Their high vapor pressure also means they can easily evaporate into the air, increasing the risk of inhalation and potential health issues (such as respiratory irritation, asthma, or central nervous system effects).

For these reasons, it was important to us to develop a formula free from these ingredients and replace them with less reactive, more natural alternatives that offer comparable durability and shine.