Extreme hair fall. E supplement help?

I have oily dandruff from many years and due to my extremely brittle hair I cannot use harsh dandruff shampoos.i tried homeopathy for 1-2 months but it did not help.there is a constant hair fall but from last 3 months situation is such that mere touching of hair leads to a lot of hair fall.shampooing,oiling or combing are obviously extremely heartbreaking exercises as I lose bunches of hair.i don't know how to get rid of it as applying anything, touching or combing leads to same issue.my hair have become thin and scalp is also visible.i am also seeing a lot of white hair suddenly.this is leading a lot of depression and lack of self esteem.i also had a routine medical examination in Feb but there was nothing detected.can any biotin or vitamin e supplement help?please help.