This will cure your dandruff in about a week or two weeks with consistency and it's all about blood flow.
What you do is get a boar bristle brush and vigorously brush/rub it on your scalp until the skin turns pink/red from the irritation. Takes about 5 minutes twice a day. This irritation brings blood closer to the surface of the skin and your dandruff will be gone in a couple weeks. It may also act in an exfoliating way as well but I believe it works mostly because of improved blood flow to the scalp
If you have buzzed short hair you can easily brush all over your scalp with good pressure for 5 minutes a day until it looks pink/red from the irritation. If you have longer hair you may need to use small, quick back and fourth strokes in sections covering your entire scalp. But what you want is the scalp to be red from the irritation caused by the boar bristles.
Haven't had dandruff in months since starting this.