Hyaluronic acid (sodium hyaluronate) is a glycosaminoglycan, which do not form covalent bonds with proteins and does not contain sulfate groups. Creates so called proteoglycans aggregates absorbing water and which are responsible for the resistance of cartilage. It is one of the components responsible for the intra-articular fluid viscosity. It takes part in the regeneration of skin tissue. It is synthesized in the body providing a full daily demand. Supplementation applies to athletes exposed to overload of the locomotor system. It is a component of preparations supporting the regeneration of joints and tendons and cosmetics supporting the condition of hair, skin and nails.