evidence: These claims are based on anecdotal evidence and unsupported opinions and there is no scientific evidence B17 can effectively treat cancer or any other illness. B17 can also have serious side effects and it is banned by the U.S. Food and Drug Agency (FDA). It is also banned in the UK and Europe. [...] - There have been no controlled clinical trials on people of B17 (laetrile, amygdalin) reported. Some anecdotal reports and case reports have not shown B17 to be an effective treatment for cancer.