Choosing Protein Supplements: The Four Important Protein Sources

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 protein. 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 the protein comes from that matters. While most of us get all the protein we need from our diets, athletes often need protein 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 4 common types of protein supplements are whey, soy, egg and casein. Protein supplements can be strictly one type of protein or it can be a mix of, usually, two different types of protein.

Whey protein is derived from milk and is the protein source used in the majority of protein supplements. Whey protein contains both essential and nonessential amino acids. The essential amino acids are those which must be obtained through the diet since our bodies cannot produce them ” and as you may have guessed, nonessential amino acids are those which we can produce, but may want more of through dietary sources. Whey protein is easily digested and used by the human body, the exception being those who have allergies to milk, who should avoid concentrated whey protein. As it happens, the concentrated form is preferred for protein supplements, being inexpensive to produce and containing between 30% and 85% protein by weight. There are also whey protein isolates, with a protein content of around 90%, which are more expensive. Whey protein is not only an excellent protein source, but also boosts immune function, contains amino acids and is helpful in speeding along muscle recovery after a workout.

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 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 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.