Nioxin Scalp Treatment System 4 is a daily leave-in scalp treatment with SPF 15 sunscreen that protects scalp skin from harmful UVA and UVB rays - delivering essential botanicals, nutrients, antioxidants, vitamins and cytokines onto the scalp skin and hair to help safeguard against environmental residue and DHT buildup on the scalp. May cause temporary redness after application.

BioAmp: Adds thickness and strength.
Activ-Renewal: Gives a more youthful-looking scalp and fuller, healthier looking hair.
Transactive Delivery System: Delivers essential nutrients onto the scalp which improves the appearance of thinning hair and creates an environment for fuller, healthier looking hair.

Directions for use:
- Apply Nioxin Scalp Treatment System 4 directly to entire scalp.
- Gently massage into scalp. Do not rinse.