What determines the quality and bioavailability of a particular type of protein? The answer is the amino acid structure of the protein itself. Let me explain.
All protein is comprised of amino acids. The more complete the amino acid profile determines how complete, or incomplete a protein source is, and the quality of that protein source. Some proteins are missing complete amino acids therefore they are known as incomplete proteins. Each amino acid within a protein plays a particular role in our overall health. If certain amino acids are not consumed for long periods of time dietary inadequacies can occur leading to health problems.
All vegetable sources of protein are incomplete proteins. They must be grouped with other proteins to make a complete protein. This fact is one of the complicating factors in following a strict vegetarian diet. Smart vegetarians need to pay close attention to assure they are getting their amino acid needs met. Soy, rice, hemp, and other plant based protein powders are structurally the worst proteins you can buy for yourself. If an individual is using them for there main protein source they are missing certain key amino acids in their diets.
Animal based proteins are complete proteins. Egg white and whey protein powders are certainly the best proteins on the market. But I do favor whey over egg white, and here is why. Even though egg white is a complete protein and is not missing any particular amino acid, it is has lower levels of certain amino acids than whey. Therefore whey is a more complete protein than egg white. Egg white is good, but whey is better.
