Viviscal Hair Thickening Serum 50mlInstantly coats strands for thicker, fuller-looking hair A lightweight formula that doesn’t weigh hair down At Viviscal, we understand the science of healthy hair growth from inside out. Formulated with hair building blocks Biotin and Keratin, and fortified with Marine Collagen and Seaweed extract, Viviscal Hair Thickening Serum is a lightweight leave-in treatment that coats each hair strand creating multi-dimensional density without friss leading to thicker, fuller-looking hair. Church & Dwight UK Ltd, Wear Bay Road, Folkestone, CT19 6PG, UK. SOFIBEL SAS, 110 to 114 rue Victor Hugo, 92686 Levallois-Perret.