Dr. Groot Scalp Revitalizing Solution Hair Thickening Shampoo Biotin 13oz 385ml Dr. Groot Scalp Revitalizing Solution Hair Thickening Shampoo offers a dermatologist-tested formula designed for all scalp types. This innovative microbiome technology combines biotin and capsulated prebiotics to visibly volumize hair from the root while improving scalp moisture by up to 169% in just two weeks. Formulated without added silicone or sulfates, it features green capsules that help create the appearance of fuller, healthier-looking hair. This 13 fl oz bottle provides a deep cleanse that supports hair density and scalp health through a blend of premium ingredients including rosemary, ginger root, and salicylic acid. #Minimalist