Tresemme Biotin + Repair 7 Shampoo 400 ml The biotin and Pro-Bond complex contained in Tresemme Biotin + Repair 7 Shampoo 400 ml penetrate deep into the hair fiber and repair broken connections caused by hair damage. Regardless of the styling method used - blow-drying, bleaching, blow-drying, straightening, coloring, braiding or curling - Biotin+ Repair 7 strengthens each hair strand from the inside out to repair and protect it so you can continue styling without damage it. Application: Apply to wet hair, gently massage the scalp and hair roots with your fingertips and lather from roots to ends, then rinse thoroughly.