Reproduced from pluscompare.com:
I’ve been battling sebborehic dermatitis for at least three years now, and after seeing a dermatologist he explained that the condition was merely an overgrowth of yeast on the scalp and by treating it with a shampoo that contained 2% pyrithion zinc, I had a good chance of clearing it up, as yeast can’t survive in a zinc filled environment. He also told me that you have to leave any dandruff shampoo in your hair for five full minutes in order to give the medicine in them a chance to work. This is a terrific product that has greatly helped subdue the condition.
Some other helpful information the dr. gave me was the necessity of washing your hair every single day, he also informed me that yeast can gain a tolerance to the various medicated shampoos and for the best results you should swap them around periodically.
