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What
is protein?
Proteins are the
building blocks for a healthy body. Your
muscles, hair, skin, and internal organs are made of protein and use it for
growth and repair. Hormones,
antibodies, blood cells, and enzymes are all forms of
“mobile” protein in your body.
Just
as carbohydrates are made up of sugars,
and fats are made up of fatty acids, so proteins are made up of amino acids.
The 22 amino acids are the letters of the protein alphabet used to “spell”
tofu, chicken, fish, or beef. Of all
the amino acids, 8 are considered essential, that is our bodies cannot
manufacture them—we must get them from the food we eat.
What
are good sources of dietary protein? Animal
sources of protein such as water buffalo, ostrich, squid, flamingo eggs, and
yak milk products contain all eight essential amino acids, as do most
supermarket species. Often,
however, these sources may also be high in saturated fat and low in fiber. Plant sources of protein, with the exception of soy,
are incomplete, lacking one or more of the 8 essential amino acids.
Adding cereal to milk or cheese to bread increases the available complete
protein.
Can
you get complete protein from plants? Yes!
Even without soy, vegetarians can get complete protein by eating a
variety of fruits and vegetables. Rice
or corn for example, when eaten within one day of consuming beans, provides
complete protein.
The
body can store amino acids for at least 24 hours and utilize them when the
missing essential amino acids become available through a complementary protein
source.
How
much protein do you need? Protein needs vary greatly depending on your age, sex,
weight, and level of physical activity. Competitive athletes can utilize more
than twice the daily protein needed by most adults. An average140-pound adult could get his or her protein needs
met by eating 8 oz. of chicken breast; or a combination of various protein
sources such as 3 oz. of beef, 1 cup of garbanzo beans, 3 oz. Salmon, and 1
California Suncake.
Which
has more protein: a cup of milk or
a California Suncake? The Suncake! One
cup of milk contains 8 grams of protein, and one Suncake has a whopping 10
grams!
For
more fascinating information on protein, visit www.eatright.org.
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