MCWtrainer

There have been a lot of questions about what proteins are out there and what they are all used for. Here is a short explaination of the differences and usages...

Protein, which provides four calories of energy per gram, is the builing block fof muscle and amino acids are the building blocks of protein. There are essential amino acids, ones you mustget from the diet because your body cannot produce them (tryptophan, lysine, methionine, phenylalanone, threonine, valine, leucine, and isoleucine), and non-essential amino acids (such as tyrosine, glycine, cysteine, proline, serine, and aspartic acid).

Protein helps support lean muscle tissue, aids in the productoin of hormones and enzymes, and supports immune function. Exercising individuals have higher daily protein requirements than sedentary individuals as exercise increases the body's need for protein. Since protein is necessary to build muscle, it an actually help speed up metabolism, because it takes energy (calories) to maintain lean muscle mass at rest. This may allow you to lose more fat.

Whey Protein: This highly absorbable protein provides the highest concentration of the BCAAs leucine, isoleucine, and valine, which play a key role in the muscle-builing process and also support immune function. Hydrolyzed whey protein has some of the benefits of whey while providing highly absorbable peptides that can have anabolic effects.

Casein Protein: A milk protein that seems to have a timed-release effect and a high glutamine content, which can enhance exercise recovery (not proven yet) and boost immune function. Clinicaly proven to incrase lean uscle mass and strength, casein is a good nighttime protein.

Milk Protein Isolate: This contains both whey and casein and is a good source for these two proteins.

Soy Protein Isolate: This vegetarian protein source has been shown to enhance thyroid hormone output, which can increase metobolic rate to support fat loss. The isolavones in soy have numerous health benefits, including lowering cholesterol and triglyceride levels. It contains an excellent ration of glutamine, arginine, and BCAAs. Soybeans, tofu, soymilk, and other forms of soy contain some soy protein concentrate, which is not the same thing as soy protein isolate. Soy foods can actually be estrogenic in men and cause water retention and bloating.

Egg Albumin: This traditional protein source boasts a great amino acid profile. Cooked egg whites are a good source of egg albumin.

Chicken Breast: A relatively low-fat, high quality protein source, chicken contains high doses of BCAAs and has a good potassium-to-sodium ratio (which can positively influence water balance).

Top Sirloin Steak: A lean protein source with an excellent potassium-to-sodium ratio, it providse heme iron and good amounts of the amino acids alanine and lysine, which can support energy and lean body mass.

Tuna: This is another lean protein source that provides an excellent amount of BCAAs. Canned versions make it easy to use and help with protion control.

Orange Roughy Fish: A very lean protein source with an outstanding potassium-to-sodium ration, orange roughy is a good source of the amino acids leucine and lysine.

Hopefully this clears up some of the questions about proteins.

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