In a nutshell, a Keratin treatment is not a chemical service, it is a smoothing treatment. This means if you have naturally curly hair, it will not chemically straighten your hair. However, it will relax the curl, drastically decrease the level of frizz and leave your hair feeling soft, visibly smoother and shiny. A Keratin Treatment does not cause damage to your hair, in fact it has the opposite effect, it will strengthen already damaged hair.