An effective & innovative leave-in treatment, the NIOXIN System 4 Scalp Treatment for noticeably thinning, fine, chemically-treated hair is the last step in your NIOXIN three step system. Specifically designed to help densify normal to fine, coloured hair types, it contains antioxidants & botanicals that work in synergy to maintain a refreshed scalp environment. Formulated with Bio AMP® & Scalp Access Delivery System® technologies, the treatment increases the appearance of density whilst strengthening every strand & reducing hair loss; its combination of Peppermint Oil & White Tea extract give the scalp a super fresh feel. Also contains added SPF 15 for protection against damaging sun rays. Expect glossy, denser-looking hair with a rejuvenated & stimulated scalp.