What Are The Sources Of Protein Supplements?

By Henrick Scofers

Protein is an essential nutrient for the body, especially
for the muscles. The general recommendation is an intake of
around .3 grams of protein for each pound a person weighs.
For athletes and bodybuilders, though, the requirement is
higher because the body is working harder and demands more.
The recommendation jumps from .3 to 1.25 grams for this
group of people.

It's not only how much protein you get though; it's also
where it comes from that matters. While most of us get all
the protein we need from our diets, athletes often need
supplements to provide them with enough of this important
nutrient. The protein used in protein supplements is nearly
always from the same four sources. Each is used differently
by the body and are more or less suitable for different
individuals.

These four sources used in most protein supplements are egg,
whey, soy and casein. There are protein supplements which
use only one type, but it is more common to have two of
these proteins in a single supplement.

Whey protein comes from milk and is the most common of these
four sources used to produce protein supplements. This
protein contains essential amino acids (those which we
cannot produce ourselves and must take in through dietary
sources) and nonessential amino acids. Except for people who
are allergic to milk or have lactose intolerance (who should
avoid whey protein), this is a great source of protein which
is readily digested. Concentrated whey contains 30%-85%
protein and is inexpensive, making it a common ingredient in
protein supplements. Whey protein isolates contain around
90% protein by weight, but are far more costly. Whey protein
helps improve immune function and speeds muscle recovery in
addition to being a good source.

Soy protein is derived from soy flour. This is the most
complete vegetable protein known and like whey protein,
there are isolates and concentrated forms available;
isolates are higher in protein but more expensive. Easily
digestible, soy protein is suitable for everyone except for
the small number of people who are allergic to soy. Soy
protein can be added to foods easily and is beneficial in
lowering blood cholesterol.

Egg protein comes from egg whites. It is fat free and very
high in protein. It contains all the essential amino acids
and is completely absorbed by the body. It is considered the
best protein source. It should not be used by people who
have egg allergies.

Casein is another protein derived from milk. Casein protein
is digested more slowly than whey, which makes it a protein
often combined with other, more quickly digested proteins.
Casein protein is ideal for adding to pre-workout meals or
before bed. As with whey protein, those with milk allergies
should avoid casein protein.

Choosing the right protein is about choosing what your body
will tolerate the best and what protein will work for your
exercise habits the best. You should consider all pros and
cons of each type before you make your final decision about
protein supplements.

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