The nioxin scalp treatment 5 for medium thick natural coloured hair is formulated to give you thicker naturally voluminous hair this product is designed to be protective and caring and gently cleanses your hair and scalp leaving both revitalised formulated with hard working antioxidants and botanicals to refresh the scalp environment this nioxin scalp treatment 5 for medium thick natural coloured hair is the third step in this advanced system to restore thickness to hair directions of us