The proteins appear to inhibit the development of new blood capillaries needed to feed a fast-growing tumor. Without a feeding network, a tumor can't grow.
Shark cartilage is worthless against cancer.
Both statements appear on the World Wide Web, amid dozens of sites turned up in an Internet search for references to shark cartilage, a diet supplement trumpeted as a remedy for breast and prostate cancer. Medicinal Gold Mine on Web These Web sites on health rely on peer-reviewed information and reports published in reputable medical journals. A Government-sponsored site with links to more than 1,400 health sites. A medical search engine that allows users to type in key words to find appropriate sites. A gateway to the extensive resources of Federal agencies, including a list of diseases being studied by the various institutes.