Strengthening hyaluronic acid serum Vichy Minéral 89 Fortifying And Plumping Daily Booster. The serum contains 89% mineralizing thermal water and naturally derived hyaluronic acid. As a result, it deeply hydrates, nourishes, and strengthens the skin barrier. The serum is free from fragrance, colorants, alcohol, and silicones. It is also suitable for sensitive skin. Treat your skin to a generous dose of freshness and a radiant look with the Vichy Minéral 89 Daily Booster facial serum. Apply morning and evening to cleansed skin.