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I still haven't found a shampoo that works for greasy hair but I think that the best one available is daddy-o purple shampoo from Lush. my hair is soft and shiny afterwards whereas with other shampoo my hair looks and feels pretty much the same after washing. it's designed for people with grey, platinum or light blonde hair to prevent brassiness and to make it look brighter but it can be used on dark hair too. my grandad uses this shampoo so I thought I'd get my own. warning: I wouldn't use it on damaged or frequently bleached hair because if your hair is damaged it will act like a sponge and will absorb the colour and it might leave you with light pink hair. (this has only happened with a few cases though, if your hair is healthy this won't be a problem). My only issue is that it's very expensive, I ordered two 8.4 oz bottles which were around £25 each! but you only need a small amount, it lathers up rather nicely and is a beautiful colour.