Ondée Thermale Vitamin c serum with hyaluronic acid 30ml. In each Vitamin C Serum, you'll find a carefully crafted blend of potent and harmonious ingredients: 77% Ondée Thermale Hypermineralized Sping Water (77%), French-sourced Vitamin C, Vitamin E (alpha-tocopherol), multi-molecular hyaluronic acid, ferulic acid, plant-based lecithin.