I am having sever danduff like white poweder from my hair and beard, i tried antidandruff shampoos and apple vinger, i works with everyday use but using it as Dermatologist saying (2-3) times per week is not working, i am afraid of daily use destroys hair follicle, any ideas?

For many years I had a very persistent dandruff and nothing seemed to be able to help - anti-dandruff shampoos were making it even more intense. The only shampoo that actually helped me (though not definitely I still get it from times to times) is the Selsun Blue shampoo. It's a medical shampoo not a cosmetic product - don't expect a pleasant smell (smells like a drug) but so far this is the only product I found that actually releaved my situation.

In the US it's available for sale but they stopped production and import in the EU. There is a similar product containing the same active substance - selenium teluride available for sale in Europe which is called Selmax Blue but it's less effective though still does the job. If you decide to try it I recon you somehow get the US product otherwise try the Selmax Blue it's available in Amazon for example.