Please do not have the Kerastraight treatment done. I had this in September 2011 and am still suffering the consequences now. It did smooth my hair for about four weeks however it caused my scalp to go very itchy and sore and made me lose quite a lot of hair. The ingredients in this product are not good for you even though the product is marketed as being completely safe. Don't make the same mistake as me - I wish someone could have warned me as it is the worst thing I have ever done.