Renpure Originals Biotin & Collagen Thickening Conditioner help create and maintain a thicker, fuller head of hair with our Biotin & Collagen Thickening Conditioner. This creamy formula coats the hair fiber in a Biotin, Collagen, and Keratin-rich mixture to plump-up, recharge, and seal in everything your hair needs to achieve a more voluminous look.