Like you I too had severe dandruff problems and I tried all the shampoo which had no effect at all. While using the shampoo the dandruff use to vanish but later it used appear again. While surfing the net i found this website which had given some home remedies to get of dandruff which i followed and now i do not have dandruff. http://www.luvforhair.com/ayurvedic-treatment-for-hair-loss-due-dandruff-not-mask-symptoms/