Nioxin Scalp Treatment System 1 (formerly Bionutrient Actives Treatment) is a natural leave-in scalp treatment formulated to protect scalp and hair from build up of damaging environmental pollutants and toxins like DHT (Dihydrotestosterone). Supplies maximum vitamin enriched nourishment to the hair and scalp for fuller, thicker, healthier-looking hair. Vitamin enhanced microcirculation energizes scalp cellular turnover through exfoliation, enhancing nutrient uptake on the scalp. Creates an optimum scalp environment for fuller, thicker, healthier-looking hair.