Canola Canola oil is from the rapeseed, a type of mustard plant. It was first altered by traditional plant hybridization and some of that seed is still available, organic and non-organic. Otherwise, Canola has a reputation as a healthful oil. Corn Corn, if not organic, is now frequently contaminated with GMOs. It is increasingly debatable whether certified organic corn can be kept free from contamination, especially from cross-pollination.
Corn also is the source of ascorbic acid in vitamin C supplements.
Cotton Cotton seed oil from genetically altered plants most likely would be in products containing hydrogenated fats, such as commercial French fries and chips, in common vegetable oil shortenings and some brands of margarines. Cheese companies, however, frequently claim not to know the source of their enzme. Greenpeace USA is the best source of information on GMO ingredients in supermarket land. The list is a work in progress and we're urged by Greenpeace to download its information to contact companies and give feedback. A search of biotech industry websites and of the USDA's website reveals many more GMO foods will be here within six years.