Viviscal Hair Thickening Serum, Leave-in Elixir for Thicker, Fuller Looking Hair, Instant Lightweight Hair Product with Keratin & Biotin, 1.69 fl oz

Formulated with hair building blocks Biotin and Keratin, and fortified with Marine Collagen and Seaweed extract • Viviscal Hair Thickening Serum is a lightweigh