I had a post on October 13 about Keratin, and the dangers it carries since it contains formaldehyde, and is a known carcinogen!
Seven countries have banned it. Blogger Nikki Curly also has a great article on it which can be found online!
I strongly suggest you really do some research before applying to your hair. In fact, if you have a good family practitioner, or dermatologist, I would definitely ask some questions. A couple of months back, I saw a great storyline on the effects to those that have use it. Pretty scary. Just a FYI!!
Knowledge is power!