It is chemically related to imidazolidinyl urea and is a formaldehyde releaser used as a preservative. It was International Agency for Research on Cancer to its highest toxic class, IARC 1 (known human carcinogen). Formaldehyde is classified as a probable human carcinogen by the U.S. Environmental Protection Agency, which provides sufficient evidence that formaldehyde causes nasopharyngeal cancer in humans by the International Agency for Research on Cancer. The label on your skin care product may not list "formaldehyde". The following ingredients break down and release formaldehyde: diazolidinyl urea (or 3-diol diazolidinyl urea) 2-bromo-2-nitropropane-1 (or bronopol) DMDM hydantoin. The label on your skin care product may not list "formaldehyde". The following ingredients break down and release formaldehyde: diazolidinyl urea (or 3-diol diazolidinyl urea) 2-bromo-2-nitropropane-1 (or bronopol) DMDM hydantoin.

UREA has been banned in Europe, after studies concluded that effects can result in: carcinogen, causes allergic reactions and contact dermatitis; headaches; irritates mucous membranes; damaging to eyes; linked to joint and chest pain; depression; headaches; fatigue; dizziness and immune dysfunction.