Hyaluronic acid serum with ultra-moisturising action. Hyaluronic acid provides volume and elasticity to the skin, promotes cell moisturisation and helps prevent the appearance of wrinkles and expression lines. Obtained by biotechnological origin and fermentation, in which it has been chosen a fraction of molecular weights that penetrate more easily into the epidermis. With a fresh effect it does not leave the skin heavy, has a second skin texture and fast absorption. It provides volume, filling and cohesion to the skin, helping the hydration of its deepest layers.