Vichy Dercos Collagen 17 Filler Ultra-Regenerating Conditioner 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 conditioner work?Combats caused by brittleness.Thanks to advanced active ingredients, it intensively regenerates hair along its entire length, from roots to ends.It gives hair softness and shine, smoothes it and makes combing easier. Vichy Dercos Collagen 17 Filler Ultra-Regenerating Pre-Shampoo Treatment is suitable for all hair types. For best results, use in conjunction with Vichy Dercos Collagen 17 Filler Pre-Shampoo Treatment and Shampoo.