My hair has grown greyish white and have done all manner of dye, henna etc. to mitigate the effect. I came across this product by way of hairdresserand have received many compliments. I deliberately streak it in so it is not over saturated and too fake lookiing. It takes patience-one of the other reviewers obviouslydidn't know that. My opinion is it has to be layered. Doesn't work first couple of times...needs a build up. Then it tones the grey down to abelievable blonde, grey mix. Downside is as it is not permanent it does come off on collars and bedding but is non permanent there either.Oh yeah, I'm a guy.