eCosmetics is an authorized retailer of MD Formula. MD Formula Hydrating Serum: Intense Hydration & Brightening Power This lightweight, professional-grade serum delivers deep hydration and a radiant complexion. It features a potent blend of: Polyglutamic Acid (1%): Provides superior hydration compared to Hyaluronic Acid, aiming to create the look of deeply moisturized, healthy skin. Vitamin C (3%): Aims to temporarily brighten the complexion, support collagen production, and may reduce the temporary appearance of hyperpigmentation.