This product damaged my hair, I have colored my hair so I am not sure if that was the problem. The box said it was safe to use on color-treated hair, so I thought it would be ok. After I put the treatment in; the way my hair looked and felt was horrible. I have had the treatment in the salon. So I still figured to at least try to flat iron the product into the hair and maybe it would look and feel better....WRONG!!!! OMG sizzle and fry with yellow discolor in the area I tried to test, so I stopped and washed the product out. Had to cut my hair because of the damage from the product, finally after a month and a half it is looking a little better but will never try an @ home Brazilian treatment again.