Keratin is a protein that works just like a conditioner, so a keratin hair treatment is a more sophisticated treatment that supplies your hair with keratin. When using iron straighteners, you have probably noticed already that you only straighten the middle and end parts, without the roots. It only takes a few weeks or even days to get your hair curly or frizzy again, since keratin fades away. On the other hand, such a treatment is applied on the entire hair. The results will be longer lasting, but you will also adopt a natural appearance. Furthermore, there are no risks to burn your hair.