Viviscal Thin to Thick Elixir encourages thicker, fuller-looking hair. The lightweight, leave-in treatment nourishes and promotes a healthy scalp with its proprietary Ana-Tel complex. Formulated with biotin, collagen, and keratin, the elixir works to balance and nourish all hair types. Designed as a non-greasy formula, the Thin to Thick Elixir absorbs quickly to leave hair looking more voluminous. Use this elixir with other Viviscal professional products for best results.