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Grains > Grain Shopping Guide > Composition of Grain
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The many types of grains that are used for food have much in common in spite of the differences in size, color, texture, and flavor. All grains are the seeds of the plants and the composition of the seeds or grains is basically the same. The following components are common to all types of grain: bran, germ, and endosperm.
Bran
The bran is the nutrient packed layers covering the inner kernel that may or may not be used, depending on the type of product that is processed from the grain. Bran is basically indigestible, but it is loaded with fiber, which is important for digestive health.
Germ
The germ is the oily part of the seed or kernel from which a new plant sprouts and like the bran, is full of nutrients. The germ also contains fat, which decreases the shelf life of the grain and any grain product containing the germ.
Endosperm
The endosperm (or inner kernel) is the largest portion of the grain containing most of the protein and carbohydrates, but only small quantities of vitamins and minerals. For many types of grain products, such as refined flours, it is the only part of the grain that is used. |
| Note: Many, but not all grains have an outer covering called a hull or husk, which may resemble a thick, papery layer, as is the case with rice, barley, and oats. The hull is removed before the grain is processed, however some grains lose their hulls during harvesting. |
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Composition of Grain article - Related Content |
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