A powerhouse for thinning hair, the Nioxin System 1 Scalp + Hair Thickening Treatment visibly strengthens strands to help reduce the look of damage and breakage. Enrich with a potent blend of niacinamide and biotin, the formula can be easily spritzed onto the scalp and worked through the lengths and ends, encouraging a fuller-looking, thicker finish. Complement with the full System 1 set to enhance your routine.