The hard outer layer of grain seeds like wheat or oats that is removed during milling to make flour.
From Old French 'bren' and Germanic roots. The word has meant this outer grain layer for over a thousand years in English.
Whole wheat bread contains bran, which is full of fiber that's great for your digestion—refined white flour removes it, which is why whole grain is considered healthier, even though people once thought refined grain was fancier!
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