Some people believe that shark cartilage can treat cancer - based on the idea that sharks don't get cancer. To that end, they pop cartilage pills and eat shark's fin. Well, time to stop. Professor Gary Ostrander of Johns Hopkins University reminded the American Association for Cancer Research in San Francisco there were 40 reported cases of cancer among sharks, skates and rays, from figures from US National Cancer Institute Registry of Tumours in Lower Animals.
Cartilage does have chemicals that prevent the growth of blood vessels ie.