Biotin & Collagen Renpure Originals Thickening Shampoo

Renpur Originals' Biotin and Collagen thickening shampoo is a volumizing shampoo that is safe for color-treated hair. It is made with biotin, a Vitamin B complex that helps to strengthen hair, and collagen, a protein that helps add volume. This is a very gentle shampoo that adds body to the hair and increases strength. It is also plant-based and sulfate free.