Helan's Hyaluronic Acid is an active ingredient of biotechnological origin that favours long-lasting moisturizing action both on the skin surface and deep down. The molecules with higt molecular weight tend to form a cross-linked film, creating aprotective layer against external agents. The molecules with medium and low molecular weight determine hydration of the skin also in depth filling the spaces between the fibers of the skin tissue promoting hydration and improving the elasticity and turgor of the skin, real bastions against the formation of wrinkles.