They sequenced DNA from the heads of people with healthy hair, and from others with dry, dandruffy scalps—none of whom had used anti-dandruff shampoo within the last six months.
" Really, really interestingly, we found there was approximately 100 times more of this bacteria on a dry or a dandruff scalp than there was on a healthy scalp."
Because cider vinegar is so acidic, Dr. McDonald says it can kill some of the microbes that make your hair stink, and it can also limit the population of a type of fungus that can lead to dandruff.
I'm selling hair growers essentially wash your hair more often, apply this ointment, heal your scalp disease, your dandruff, and then your hair will grow.