i had thought about using henna, but didn't want to commit myself to the color change. i'd been fighting seborrhoeic eczema/dermatitis/dandruff for about 10-12 years, and i had it pretty bad, as in a whole patch behind my ear from where i could peel off whole eraser sized (or bigger!) flakes. ever since i've started using apple cider vinegar as a rinse, and i haven't had flakes of any kind at all. i don't want to jinx myself by saying that it's cured, but it's definitely under control to the point that i have nothing going on with my scalp, and it's been that way for almost a year.