Nioxin Hair Thickening System Kit 4 - For coloured hair with progressed thinning

System Kit 4 is a professional 3-step treatment system designed specifically for colour-treated hair experiencing progressive thinning. This comprehensive kit includes a nourishing shampoo, conditioning treatment, and leave-on scalp + hair thickening treatment, all formulated to work together for visible results. Each product is enriched with clinically proven ingredients including niacinamide, wild mint oil, peppermint oil, and caffeine to stimulate the scalp and strengthen hair from root to tip. The UV-protecting formula safeguards both scalp and strands against environmental damage and colour fading. Clinically and dermatologically tested, System Kit 4 delivers noticeably thicker, fuller hair within 30 days. The advanced nutrient and antioxidant blend nourishes the scalp while repairing dry, damaged hair, restoring vitality and body to colour-treated locks. Ideal for those seeking professional-grade results at home.