Yeast

What does everyone think about using brewer's yeast in feed?
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A one-sentence summary and a piece of advice: too many mouths and too little porridge, lots of fakes around, better to use other fermented products. For example, fermented soybean meal.
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Lots of fakes, quality is hard to control.
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True active dry yeast can indeed be used as a protein source. But you need a good eye for quality, because aside from being able to use simple sugars, yeast has no ability to digest any other nutrients.
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Learned something, thanks everyone