HAIR BOOSTER SERUM 3.4OZ. Benefits: Protects Hair Follicle: Nioxin Hair Booster Serum creates a barrier for hair cuticles, protecting them against any damage. Protects Hair Thickness: This advanced treatment protects the diameter of hair strands, making the hair look thicker. Targeted Solution: Formulated specifically for progressed thinning hair, Nioxin Intensive Hair Booster provides a targeted solution for areas of concern like receding hairlines or thinning crown.. Easy Application: With its convenient leave-in formula, Nioxin Hair Booster Serum can be seamlessly integrated into your daily hair care routine. Simply apply to the roots and leave in, without the need for rinsing.. Scientifically Proven Results: Backed by years of research and development, Nioxin Hair Booster Serum has been scientifically tested to improve the appearance of thinning hair, delivering visible results and a noticeable difference.. : :