Nioxin Scalp Recovery Serum is an anti-dandruff leave-on treatment proven to help prevent and relieve the symptoms of seborrheic dermatitis, dandruff, and other scalp-related issues such as flaking, dryness and itching, leaving the scalp 100% flake-free. Nioxin Scalp Recovery™ 3-Part System contains ZPT-NIODerma™ Technology (with Pyrithione Zinc, an FDA-approved active ingredient) and green tea extract. The dermatologist-tested ingredients gently cleanses your scalp, helps to restore its natural balance and control hair moisture.