If avoiding supplements and animal byproducts, what specific confirmation is necessary when purchasing grain sold for animal consumption for potential direct human use?

Confirming the source is human-grade or at least free of veterinary drug residues

While simple feeds composed only of whole grains and molasses bypass the high risks associated with MBM or animal byproducts, they still fall under lower regulatory standards than human food. Therefore, if an individual decides to purchase grain sold as animal feed for consumption in bulk, the critical step is to confirm its pedigree. It must be verified as either officially human-grade or, at a minimum, guaranteed to be entirely free of veterinary drug residues, as this chemical contamination risk remains present even in simple grain mixes intended for livestock.