The Truth about Protein!
Posted on October 02 2018
Let’s first talk about protein quality. Protein quality determines by the presence of non-essential and essential proteins. Our body is unable to produce essential proteins therefore we must consume them. A complete protein includes both essential and non-essential proteins. Don’t be confused by the term “non-essential”. Our body still needs these proteins to build muscle and for other physiological reasons. Complete proteins are found in animal based proteins (fish, steak, milk, whey, casein) and incomplete proteins are plant based with the exception of soy.
There are four (4) main protein subtypes; concentrate, isolate, hydrolyzed and micellar. In comparison, concentrate is the lowest quality of protein because it yields the lowest percent of protein at 70%-80%. Isolate yields 90%-94% protein, but cost more than concentrate. Hydrolyzed and micellar are the most expensive. Hydrolyzed requires no further breakdown by your body’s enzymes and enters your bloodstream faster than concentrate and isolate. Micellar is readily digested and absorbed and is not altered or damaged by physical and chemical processes that cause damage to the protein’s structure. Some protein makers mix concentrate in with isolate or hydrolyzed, lowering the quality and then label the product isolate or hydrolyzed.
Biological value (BV)
BV is simply the measure of how well the body can absorb and utilize a protein. The measure quantifies how readily the digested protein can be used in protein synthesis in the cells of the organism. As the graph on the left shows, Whey protein isolate has the highest BV when compared to other sources of protein and has the highest concentration of the 9 essential proteins and is fast absorbing.