evidence: Vitamin B17 destroys cancer cells but it has been banned by the FDA. [...] A misleading post that was widely shared in 2015 is recirculating on X (formerly Twitter). The post claims that cannabis oil and "vitamin B17" destroy cancer cells. It goes on to say that both substances have been banned by the US Food and Drug Administration (FDA) and that this needs to be explained. [...] It is also true that ‘vitamin’ B17 has been banned for several decades by the FDA.