This is one of the few straightening systems that’s a great alternative to the highly toxic Brazilian Blowout (AKA Keratin Treatments,) out there. It contains a tiny amount of formaldehyde, although it’s less than 30 times less that of average indoor air! http://www.organiccolorsystems.com/keragreen-formaldehyde-results/.
You need to have the treatment done in a salon and the downside is that you will not be able to wash your hair for 3 or 4 days – small price to pay for those who want to eliminate their frizz for good. The Keragreen shampoos and conditioners are also really great.