Vichy Dercos Collagen 17 Filler Shampoo is part of a three-step hair and scalp care routine to combat breakage. The formula is enriched with citric acid and procollagen peptides, which help strengthen the hair fiber. How does Vichy Dercos Collagen 17 Filler shampoo work?Combats caused by brittleness.Thanks to advanced active ingredients, it intensively regenerates hair along its entire length, from roots to ends.Perfectly cleanses and revitalizes hair from roots to ends and gives it visible volume. Vichy Dercos Collagen 17 Filler Ultra-Regenerating Shampoo is suitable for all hair types. For best results, use with Vichy Dercos Collagen 17 Filler Shampoo and Conditioner.