Whether related to its tendency to release formaldehyde or not, urea has a tendency to cause allergic reactions. Those with sensitive and infected skin are advised to steer clear of this ingredient. In fact, the American Academy of Dermatology has established diazolidinyl urea as a primary cause of contact dermatitis.
In the U.S. approximately 20% of cosmetics and personal care products contain a formaldehyde-releaser and the frequency of contact allergy to these ingredients is much higher among Americans compared to studies in Europe, where these ingredients are banned.
Often found in: Facial moisturizers, facial cleansers, anti-aging creams, body lotions, eye creams, foundations, shampoos & conditioners, bubble bath, baby wipes, styling mousses and foams, acne treatments, lip balm/treatments, mascara, sunless tanning products, antiperspirants/deodorants, nail polishes
Also under the names: Diazolidinyl urea, Imidazolidinyl urea, DMDM hydantoin, Sodium hyroxymethylglycinate