One reason attributing to their successful survival rate is credited to their immune systems and skeletal structures composed of cartilage which protect them against bacteria, viruses and toxins.
Cartilage is a tough, elastic connective tissue found in sharks, humans and most other animals.
Researchers believe that the shark s cartilage along with its strong resistance to disease is what enabled it to survive this long. Scientific studies have found shark cartilage to be effective in the relief and treatment of many medical conditions including arthritis and psoriasis. Natural Promise offers 200 mesh shark cartilage for easier absorption. Natural Promise Shark Cartilage is harvested from the clean waters of Australia and made entirely of shark backbone. It is an excellent source of absorbable calcium and phosphorous.