A leave-in hair serum from the Italian brand Collistar's Pure Actives range, formulated with collagen to help weakened or thinning hair look stronger, fuller and more resilient. The formula adds body, hydration and shine without weighing the hair down and needs no rinsing. Apply to clean, towel-dried hair, distribute evenly through the mid-lengths and ends, then style as usual. Use daily as part of a strengthening routine alongside other Pure Actives hair care. Supplied in a 250ml bottle.