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The Foundation Of Protein Supplements: Protein Sources

By Henrick Scofers on July 8, 2009

Protein is a nutrient which is essential to the human body, particularly for the muscle tissues. Nutritionists recommend a daily intake of about .3 grams of protein 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 of protein for each pound of body weight.

Not only is the amount of protein important, but the source of the protein also matters. For the average person, diet alone is sufficient to get the needed amount of protein, but for those who need more than the average amount of protein, there are protein supplements that are necessary. There are 4 different types of protein that can be used. Each reacts differently and so the type of protein used should be chosen carefully.

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. It is the most common choice in protein supplements. Whey protein is made up of nonessential and essential amino acids. Essential amino acids are not made by the body naturally and must come through diet. The body takes well to whey protein and will use it easily and safely. The only concern about whey protein is that it is not safe for those with a milk allergy or who are lactose intolerant. Concentrated whey protein is most often preferred as it more available and less expensive. Concentrated forms contain anywhere from 30 to 85% protein. The isolate forms will have about 90%, but are more expensive and harder to find. Whey protein helps to boost the immune system, provides amino acids and helps for quick muscle recovery and prevents muscle breakdown.

Soy protein is made from soy flour and is the most complete plant-based protein available. Just as with whey powder, there are soy protein concentrates and isolates, with the isolate being a richer source of protein but also more costly. Soy protein is also easily digestible and is suitable for persons with milk allergies or lactose intolerance. There are however some people who are allergic to soy and obviously, these people should not use soy-based protein supplements. Soy protein can be mixed into foods to increase the protein content and has the added benefit of helping to regulate cholesterol levels.

Egg protein is an excellent protein source. Derived from egg whites, egg protein contains all of the essential amino acids and is easily digestible. It’s generally considered to be the best source of protein for supplements, but as with other proteins, there are some people who are allergic and should not use it.

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.

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