This is really only an issue for people with celiac disease, as any gluten - contamination of oats processed in factories processing wheat, etc. would be minimal. (epicurious.com)
The corn starch used to make high fructose corn syrup contains mostly glucose originally, but factory processes convert some to fructose to make the syrup sweeter. (supernaturalacnetreatment.com)
Most people have no idea that rendering factories process thousands of dead animals, gallons of kitchen grease, and tons of frying oil into animal feed. (chai-online.org)