Another substance found in common plant food with low-level toxicity is oxalate — it is found in bran, beets, soy, blueberries, lime peel, orange peel, nuts, and several other things.
Which is now considered this horrible gluten-filled, carb-filled evil with sugar in it—Bran muffins, which are really just like small cakes, were considered superfoods.
It does contain some whole grains but remember that wheat bran is not a whole grain because the bran is just one part of the grain even though it does offer nutrition.