|
What
are Whole Grains?
All grains start life as whole grains. In their natural state growing in
the fields, whole grains are the entire seed of a plant. This seed (which
industry calls a "kernel") is made up of three key parts: the
bran, the germ, and the endosperm.

The
bran is the multi-layered outer skin of the kernel, and is tough
enough to protect the other two parts of the kernel from assaults by
sunlight, pests, water, and disease. It contains important antioxidants, B
vitamins and fiber.
The
germ is the embryo which, if fertilized by pollen, will sprout into
a new plant. It contains many B vitamins, some protein, minerals, and
healthy fats.
The
endosperm is the germ’s food supply, which provides essential
energy to the young plant so it can send roots down for water and
nutrients, and send sprouts up for sunlight’s photosynthesizing power.
The endosperm is by far the largest portion of the kernel. It contains
starchy carbohydrates, proteins and small amounts of vitamins and
minerals.
Whole
grains contain all three parts of the kernel. Refining normally removes
the bran and the germ, leaving only the endosperm. Without the bran and
germ, about 25% of a grain’s protein is lost, along with at least
seventeen key nutrients. Processors add back some vitamins and minerals to
enrich refined grains, so refined products still contribute valuable
nutrients. But whole grains are healthier, providing more protein, more
fiber and many important vitamins and minerals.
Whole
grains may be eaten whole, cracked, split or ground. They can be milled
into flour or used to make breads, cereals and other processed foods. If a
food label states that the package contains whole grain, the "whole
grain" part of the food inside the package is required to have
virtually the same proportions of bran, germ, and endosperm as the
harvested kernel does before it is processed.
Whole
grains currently make up about 10-15 percent of grains on supermarket
shelves. At a time when health professionals urge consumers to eat at
least half of their grains as whole grains, it’s a challenge for
consumers to find these healthier whole grains in a sea of refined grain
foods.
What are the Benefits of Whole Grains?
Consumers are increasingly aware that fruits and vegetables contain
disease-fighting phytochemicals and antioxidants, but they do not realize
whole grains are often an even better source of these key nutrients.
Moreover, whole grains have some valuable antioxidants not found in fruits
and vegetables, as well as B vitamins, vitamin E, magnesium, iron and
fiber.
The
medical evidence is clear that whole grains reduce risks of heart disease,
stroke, cancer, diabetes and obesity. Few foods can offer such diverse
benefits.
People
who eat whole grains regularly have a lower risk of obesity, as measured
by their body mass index and waist-to-hip ratios. They also have lower
cholesterol levels. Because of the phytochemicals and antioxidants, people
who eat three daily servings of whole grains have been shown to reduce
their risk of heart disease by 25-36%, stroke by 37%, Type II diabetes by
21-27%, digestive system cancers by 21-43%, and hormone-related cancers by
10-40%. See the latest research on whole
grains and health by clicking here.
|
|