Refinement of whole grains (e. g., making white flour from whole wheat) strips away the bran and germ, leaving only the endosperm. which of the following is true about grain products? multiple choice refined grains are lower in carbohydrates than whole grains. whole wheat bread is higher in vitamin e than white bread. although many minerals are lost, zinc and iron are added during food processing. all of the b vitamins lost during refinement are added back during food processing.