[header] How to choose anti dandruff shampoo [title] Choose shampoos containing zinc pyrithione. [step] Zinc pyrithione is an antibacterial and antifungal agent. Dandruff shampoos containing this ingredient are especially effective at treating dandruff and seborrheic dermatitis caused by malassezia fungi. 
[substeps] Popular brands include head & shoulders and jason dandruff relief 2 in 1. [title] Consider tar-based shampoos.