“Spent grains” is the general term for the remnants of corn, rye, barley and other grains used to make alcoholic beverages. While they are a byproduct of human-food production, spent grains have a long history of being used as a valuable source of nutrients to feed many animal species. They also have been the subject of ongoing concerns among beverage distillers and brewers over the past few years as the FDA drafted rules that will implement the FDA Food Safety Modernization Act (FSMA).
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