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The whole grains are cereal grains which retain the bran and germ and the endosperm, in contrast to refined grains which retain only the endosperm.
To refine the grains must shredding, this is achieved by obtaining a finer texture, making them more palatable, less perishable, however, for this reason that favors their glycemic index is greater, so that the carbohydrate from them are absorbed more easily and quickly and can increase blood glucose levels more quickly than would a whole grain, not to mention losing valuable nutrition to go through this process |