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As with other artificial sweeteners, there is concern over the safety of acesulfame potassium. Although studies of these sweeteners show varying and controversial degrees of dietary safety, the United States Food and Drug Administration (US FDA) has approved their general use. Critics[who?] say acesulfame potassium has not been studied adequately and may be carcinogenic, although these claims have been dismissed by the US FDA and by equivalent authorities in the European Union
Activists in UK plan to trash crop experiment
They claim the test of genetically modified wheat must be stopped.
In mid-April, a group calling itself 'Take the Flour Back' issued a blunt threat: "Pull up the GM wheat, or we will." Now, their deadline for action is fast approaching, and efforts to defuse the situation have gone nowhere, leaving researchers facing a potential confrontation this Sunday.