Glyphosate has been found in a variety of oat products, including oat meals and cereals, as well as some lentils and barleys. Some experts believe late season glyphosate spraying — which hastens the drying out process for crops in the field — is the culprit. “I used to eat oat products frequently, but when I learned about pre-harvest desiccation I stopped eating any oats that weren’t grown organically,” Myers told Mamavation. Heavy metals can get into food from soil, past pesticide use, manufacturing or storage.