Polyglycan is an injectable solution that helps maintain healthy joints and mobility in horses. It is indicated for the replacement of lost or damaged synovial fluid, which is the fluid found in the cavities of joints. Polyglycan also assists in the normalization of synovial fluid viscosity. Polyglycan requires a prescription from your veterinarian and requires refrigeration. Polyglycan must be kept at refrigerator temperatures at all times. To ensure proper temperature, Polyglycan requires overnight shipping at an additional cost.