A portion is the amount of food you choose to eat. There is no standard portion and no single right or wrong portion size.
A serving is a standard amount set by the U. S. government to provide advice about how much to eat or to identify how many calories and nutrients are needed. The U.S. Food and Drug Administration’s nutrition labels and MyPyramid from the U.S. Department of Agriculture (www.mypyramid.gov) are good sources for serving sizes.
For example, a portion for you might be a sandwich made with two slices of bread and some meat. According to MyPyramid, that portion would equal two servings from the grain group and two servings from the meat group.
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