This therapeutic shampoo loosens the dry, crusty buildup that is on the scalp. With continued use, the buildup on the scalp is eliminated and a fresh scalp is revealed; no more itchy, flaky scalp. Additional Product Information: We are not associated or affiliated with Nairobi and are not a licensed retailer of Nairobi. Nairobi guarantees this product only when sold through authorized retailers, and cannot guarantee the authenticity of any product sold by an unauthorized retailer. We cannot guarantee that this product is covered by any manufacturer s warranties or eligible for any manufacturer s rebate. If the UPC codes or other tracing codes are missing from any product container of a Nairobi product, please retain your purchase receipt to assist in the tracing of that product in the unlikely event it is.