4D Low Molecular Weight Hydrating Serum - 50ml Replenish is an ultra-low molecular weight Hyaluronic Acid complex that will work immediately, providing 72-hour hydration and an improved cumulative effect with long term use. Directions: Apply 1-2 pipettes to the face, neck, decolletage and back of the hands and massage until absorbed. Apply as required. Avoid contact with the eyes. Active Ingredients: Ultra-low molecular weight Hyaluronic Acid 0.25% Saccharide Isomerate 1% Glycogen 0.1% Glycerin 3%