> Cheap, common GRAS additives used for prevention or suppression of fungus of food would be ideal and tests of several are scheduled, but the progress thus far has been excruciatingly slow.

GRAS additives are frequently *not safe* in larger quantities. Examples in the bee industry are thymol, menthol, phenol, etc.

SEE:
"FDA Should Strengthen Its Oversight of Food Ingredients Determined to Be Generally Recognized as Safe (GRAS)"
GAO Report to Congressional Requesters, February 3, 2010

> The Food and Drug Administration (FDA), which is responsible for ensuring the safety of most of the U.S. food supply, does not review many of the substances added to food that manufacturers determine to be generally recognized as safe (GRAS) under the conditions of their intended use. Manufacturers add these substances -- hundreds of spices and artificial flavors, emulsifiers and binders, vitamins and minerals, and preservatives -- to enhance a food’s taste, texture, nutritional content, or shelf life. 

> GRAS substances can be marketed without FDA’s approval or even its knowledge because such substances are generally recognized among qualified experts as having been shown, through scientific procedures or experience based on common use, to be safe. Some consider GRAS substances to warrant less oversight because they generally pose a relatively low level of threat to public health. 

> However, a few substances previously assumed to be GRAS, such as cyclamate salts, have later been banned; and more recently, consumer groups have raised concerns about the safety of certain other GRAS substances, such as salt and trans fats in partially hydrogenated vegetable oils.

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