Distillers grains are a cereal byproduct of the distillation process. Brewer's spent grain usually refers to barley produced as a byproduct of brewing, while distillers grains are a mix of corn, rice and other grains.
There are two main sources of these grains. The traditional sources were from brewers. More recently, ethanol biofuel plants are a growing source. It is created in distilleries by drying mash, and is subsequently sold for a variety of purposes, usually as fodder for livestock (especially ruminants). Corn-based distillers grains from the ethanol industry are commonly sold as a high protein livestock feed that increases efficiency and lowers the risk of subacute acidosis in beef cattle.
Recently, studies indicate that dried distillers grains with solubles (DDGS) as a food source for human consumption may have some benefit in reducing heart disease risk. The mash left over from the process contains nutrients, such as protein, fiber, germ, vitamins, and minerals, and research suggests that the flour made from ddg will work well with cookies and flatbread. The texture and taste of food-grade ddg, especially corn, has been compared to breakfast cereal.
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