I have severe dandruff/dry scalp. Every few days after I shampoo, my scalp starts shedding the flakes and I can feel a layer of dead skin peeling off if I run my fingers through my scalp. Flakes are often yellowish tint and greasy, but it even shows up on shampoo days as dry flakes. I have tried using selun for a few months now and while it was working initially, it isn't proving to be very effective anymore. I'm on a healthy, protein rich diet and maintain good hygiene generally.