Healh Canada is advising Canadians who purchased Novodalin B17, an unauthorized natural health product claiming to treat cancer to stop using the product and contact their doctor for appropriate follow-up. No health products containing B17 or amygdalin have been authorized by Health Canada to treat cancer or any other condition. Health Canada does not permit cancer treatment claims for natural health products. Decisions on cancer treatment should be made with your doctor. Novodalin B17 being sold online by cdnf.com also poses serious risks to health as it is labelled to contain apricot kernel extract. Apricot kernels may contain amygdalin, a compound derived from bitter apricot kernels that has the potential to release cyanide when ingested by humans. The concentration of amygdalin is unknown at this time, however, ingesting low to moderate amounts of cyanide may lead to serious adverse health consequences and high doses may be lethal.