Nioxin System 2 Scalp Treatment 100mlFor Fine, Natural, Noticeably Thinning Hair – a three step program to treat hair loss. The third step in the 3 step program. A daily leave-in scalp treatment with SPF 15 sunscreen that protectsscalp skin from harmful UVA and UVB rays; while delivering essentialbotanicals, nutrients, antioxidants and cytokines (proteins) onto thescalp skin and hair to help safeguard against environmental residue andDHT buildup on the scalp. May cause temporary redness after application.Features:BioAmp™adds thickness and strength.Activ-Renewal™gives a more youthful-looking scalp and fuller, healthierlooking hair.Scalp Access™ Delivery System helps protect nutrients as they moisturize and energize the scalp and hair combined with SPF scalp protection against UV rays.