umm you were misinformed as it does contain formaldehyde. i am a hairstylist. keratin treatments are the new fad and a get rich quick scheme for salons. if you just ironed your hair straight 10 times on a tiny section with a 450 degree flatiron, remembering 350 degrees cooks a chicken, and used the special shampoo and smoothing conditioner you would get the same results and be 200+ dollars richer. dont believe the hype, formaldehyde is proven to dry out nails and preserve human body parts indefinatly. many companies have been taking them out of products like nail polish for yrs. this product is so strong one of the assistants at my work place had pruney fingers for 3 days after applying a dozen in one day, she said she felt nauseated also after applying them too. lets hope she does not have cancer in the future.