Glucosamine is a natural substance found in the joints, playing a role in the smooth working of cartilage, tendons and ligaments.Each ZipVit tablet contains a huge 1000mg of Glucosamine Sulphate to supplement the natural occurring Glucosamine found in your cartilage. The quality of this product over our competitors’ product is reflected in our huge sales figures... this is now our number one selling line. We believe it is one of the most effective supplements available today! 1000mg. - 360 (size S)