The primary structural protein of hair, keratin, gives your hair shaft its strength and form. A fungus known as Malassezia is the cause of dandruff, which manifests as visible flakes, an itchy scalp, and hair loss. Zinc Pyrithione and Keratin work together to purify the scalp from dandruff and shield your hair in Hair Clinic eKeratin Anti-Dandruff Moisturizing Shampoo. Hair will be left feeling hydrated, silky, free of visible flakes and itchy scalp, and there will be less hair loss.