Rapid Fat Loss Diets

Tuesday, May 19, 2009

The Foundation Of Protein Supplements: Protein Sources

By Henrick Scofers

Protein is a nutrient which is essential to the body, particularly for the muscle tissues. Nutritionists recommend a daily intake of about .3 grams for every pound of body weight. Bodybuilders and other athletes, however, require more protein in their diets to encourage muscle growth and to nourish their bodies to handle the demands of their workouts. These people should get about 1.25 grams/day for each pound of body weight.

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.

The four protein sources common in protein supplements are whey, soy, casein and egg. While some protein supplements are made from just one source, most often there will be protein from two of these sources in a given protein 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 comes from soy flour. It is the most complete vegetable protein. It comes in concentrate, isolate and like whey. The isolate form is higher in protein content and more expensive. Soy protein is easy to digest and the perfect option for people who have milk allergies or are lactose intolerant. However, people with soy allergies can not tolerate this type of protein. Soy protein can be added easily to food to increase the nutritional value and can help to lower cholesterol.

Egg protein is often mentioned as being the best protein supplements. This protein comes from egg whites and is quickly and completely digestible. Containing all of the essential amino acids, it's also a popular ingredient in protein supplements. However, there are those who are allergic to eggs and should not use protein supplements containing egg protein.

Casein protein comes from milk, but unlike whey it is slow to digest. It is slow acting and therefore often used in combination with faster acting proteins. It works well meals prior to workouts. It also is a great choice to take just before bed.

Read the labels of those protein supplements to make sure you're purchasing one that you'll tolerate and will give you the protein you need for your exercise regimen. Keep the qualities of each protein source in mind as you choose protein supplements. - 17273

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