Vichy Minéral 89 Booster 75 ml combines 89% Vichy volcanic water with highly concentrated hyaluronic acid. This unique serum with hyaluronic acid strengthens the skin's defense functions against internal and external factors such as stress, pollution, and fatigue. It is your daily dose of power for healthy, radiant skin. Its formula is hypoallergenic, fragrance-free, and has been tested on sensitive skin.