Collagen & Biotin Strengthening and Restorative Shampoo for sensitive & damaged hair, 250 ml. Collagen & Biotin Series is designed for sensitive, damaged and lacking volume. The strengthening biotin present in the composition causes the hair to be regenerated and nourished, and collagen gives them maximum volume and restores the appropriate hydration, making the hair smoother without weighing it down.. Active ingredients: Protective Biotin: strengthens the hair and gives it elasticity, prevents graying and falling out. Moisturizing Collagen: Restores hair to an appropriate level of moisture, giving maximum volume and making it easier to comb. Nourishing Argan Oil: Regenerates the hair along its entire length, nourishes it and gives it an impressive shine.. Find more hair care products in our store: amazon.co.uk/Cameleo.