The HA-Boost 4D Hydration Serum is an ultra-low molecular weight hyaluronic acid complex that works immediately, providing hydration that lasts up to 72 hours. With consistent use, this serum offers a powerful cumulative effect, visibly enhancing the skin's moisture levels over time. Active Ingredients: Ultra-low molecular weight Hyaluronic Acid 0.25% Saccharide Isomerate 1% Glycogen 0.1% Glycerin 3% Benefits  Ultra-low molecular weight hyaluronic acid with advanced "shape-shifting" technology for deep, rapid absorption. Boosts hydration levels by up to 130% for visibly plumper skin. 60x more soluble than standard hyaluronic acid Provides lasting 72-hour hydration Application:  Apply 1-2 drops to your face, neck and the back of your hands, then gently massage until absorbed. Apply as required. Avoid contact with eyes.