Effectiveness of Therapeutic Shampoo?

by Sarah L.
(Delaware, OH, USA)

Is the Therapeutic Shampoo effective on resistant scalp flaking? I've had what I think is dandruff for over ten years, and it gets worse in winter.

It makes my scalp itch and develop scabs. I haven’t had any luck with the usual brands of dandruff shampoo. (My hair stylist said it is like an adult form of cradle cap, but I'm not sure what the technical term is.)

Thank you!