evidence: One Facebook post claims "Vitamin B17 was banned by the FDA because it cures cancer!", while others refer to B17 fighting cancer as well as killing cancer or cancer cells. [...] Adrian Harris, Emeritus Professor of Medical Oncology at Oxford University, previously told AAP FactCheck "vitamin B17" can cause poisoning, especially if taken in tablet form, while Ian Olver AM, a cancer researcher at the University of Adelaide and a former Cancer Council chief executive, said the cyanide produced by amygdalin kills cells regardless of whether they’re cancerous. [...] False claims about "vitamin B17" curing cancer have also been debunked by fact-checkers at Health Feedback and Full Fact.