Conventional grains usually contain GMOs, arsenic, antibiotics, and a medley of pesticides, most likely including glyphosate. Monsanto’s glyphosate is systemic within the plant (not just a surface residue). It is said to be “the most chronically toxic herbicide” that is both an antibiotic, which disturbs friendly gut flora, and a toxin that prevents mineral absorption into the plant, the animal eating it, its products (milk, eggs, meat, cheese, etc.) and humans. (Huber and Seneff)
For more see: diseaseglyphosategmos.info.