Nioxin System #2 is an intense leave-in scalp treatment especially formulated for noticeably thinning - is a daily scalp treatment to improve the appearance of thinning hair. Bio-Amp adds thickness from inside the cuticle and strengthens the hair shaft. Bio-nutrients and Active-Renewal help provide a more youthful-looking scalp complexion. Unique Scalp Access Delivery system helps protect nutrients as they moisturize and energize the scalp and hair. Nioxin Scalp Treatment system #2 contains SPF 15 to protect scalp skin from harmful UVA/UVB rays.