L Oreal Paris Revitalift Pure Hyaluronic Acid Serum A dermatologist validated highly-concentrated anti-aging plumping hyaluronic acid serum that immediately hydrates and fills wrinkles in 2 weeks. Our Pure Hyaluronic Acid formula is infused with Vitamin C a vital antioxidant known to boost skin s radiance. What Does Hyaluronic Acid Do? Hyaluronic Acid is a potent hydration-attracting molecule naturally found in the skin but we lose it as we age which leads to lack of firmness and dryness. Hyaluronic Acid is a safe ingredient used by dermatologists for it s intensely hydrating and replumping properties.