This vegan cruelty free product lightens hair up to 7 shades. It is really gentle on the hair and when a friend is helping you lighten it at home and it is taking hours because you are getting foils, it is OK. It won't go too scary blonde, and it will obtain even colouring, and it won't wreck your hair..but you will definitely see a much lighter result whether you use it all over your hair or just in foils. I always use this product now, since I have decided to stay blonde, because I find it really doesn't seem to damage my hair.