This Nioxin Scalp and Hair Thickening System 4 Kit is designed for damaged, thinning hair types, promoting a thicker appearance. The colour-safe collection is enriched with niacinamide and biotin to encourage stronger, full-looking results. The set includes System 4 Shampoo (150ml), System 4 Conditioner (150ml), and System 4 Leave-on Treatment (50ml). The shampoo cleanses the scalp, minimizing clogged hair follicles, while the conditioner nourishes and supports natural hair strength. The leave-in treatment plumps strands for a volumised illusion and reduces hair fall. Clinically and dermatologically tested, this system thickens and strengthens hair against breakage, offering colour protection.