evidence: Corn and soybeans are commonly grown using Roundup, but is also used on hundreds of other crops. Glyphosate is sometimes used to dry out oats just prior to harvest. [...] The best way to avoid glyphosate is by knowing which foods contain it. Since oats can be prepared for harvest using the pesticide Roundup, oat cereals were the likely culprit. [...] Signature Kitchens Honey Nut Toasted Oats 762 ppb *These results are consistent with a U.S. Food and Drug Administration study of oatmeal (300 – 1670 ppb of glyphosate).