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|Grains require careful preparation because they contain a number of antinutrients that can cause serious health problems. Phytic acid, for example, is an organic acid in which phosphorus is bound. It is mostly found in the bran or outer hull of seeds. Untreated phytic acid can combine with calcium, magnesium, copper, iron and especially zinc in the intestinal tract and block their absorption. This is why a diet high in improperly prepared whole grains may lead to serious mineral deficiencies and bone loss. The modern misguided practice of consuming large amounts of unprocessed bran often improves colon transit time at first but may lead to irritable bowel syndrome and, in the long term, many other adverse effects.
Other antinutrients in whole grains include enzyme inhibitors which can inhibit digestion and put stress on the pancreas; irritating tannins; complex sugars which the body cannot break down; and gluten and related hard-to-digest proteins which may cause allergies, digestive disorders and even mental illness.
Most of these antinutrients are part of the seed's system of preservation—they prevent sprouting until the conditions are right. Plants need moisture, warmth, time and slight acidity in order to sprout. Proper preparation of grains is a kind and gentle process that imitates the process that occurs in nature. It involves soaking for a period in warm, acidulated water in the preparation of porridge, or long, slow sour dough fermentation in the making of bread. Such processes neutralize phytic acid and enzyme inhibitors. Vitamin content increases, particularly B vitamins. Tannins, complex sugars, gluten and other difficult-to-digest substances are partially broken down into simpler components that are more readily available for absorption.
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