"In 1991, at the request of an anonymous complainant, the United States Food and Drug Administration labelled stevia as an 'unsafe food additive', and restricted its import. The FDA's stated reason was 'toxicological information on stevia is inadequate to demonstrate its safety' . This ruling was controversial, as stevia proponents pointed out this designation goes against the FDA's guidelines, under which any natural substance used prior to 1958 with no reported adverse effects should be recognized as safe. After stevia was banned, several of members of the FDA board left their jobs. They were all hired at the Nutrasweet Company (a Monsanto subsidiary) in higher pay jobs, according to National (government) records. This has been criticized as a legal bribe by Nutrasweet to the FDA, to ban Stevia (then Nutrasweet's main competitor) in the U.S."
Its true about the FDA and stevia. While stevia is now available, as the FDA failed in its efforts to get it off the market, it is not sold as a sweetner but as a supplement. So according to the FDA, stevia is not a sweetner and they will not allow it to be sold as such. Never mind that they have ignored all of the data on detrimental health effects associated with aspartame (nutrasweet), but as we know, the FDA and Monsanto are in bed together.