NIOXIN LOT OF 4 SCALP OPTIMIZING CLEANSER ADVANCED THINNING 6.7 OZ / 200 ML EACH NEW NO BOX FEATURES & BENEFITS Pyrithione Zinc Shampoo.Clears scalp to help support healthy growing hair.Healthy growing hair starts with a healthy scalp.FDA approved active ingredient.Helps prevent recurrence of flaking and itching associated with dandruff.Reduces irritation and redeness associated with dandruff.Dermatologically & Clinically tested.Nioxin is the N°1 Salon Brand for thicker and fuller hair with more than 30 years expertise in thinning hair.