Whey protein is one of the most popular choices for protein supplementation. Whey protein features a superior biological value, or BV, when compared to other proteins. This means that whey protein is absorbed and utilized by your body better than other sources of protein, such as meat, eggs and soy protein. The most pure and high-quality type of whey protein is called whey protein isolate. Consult your doctor before trying protein supplements.
Biological Value
The biological value of whey protein isolates can be as high as 157, according to Bodybuilding.com. This is nearly twice as high as the protein found in meat, and it is over 50 points higher than whey protein concentrate formulas. Whey protein isolate is processed to remove much of the fat and lactose, so if you are lactose intolerant, you may find whey protein isolates a better choice compared with other types of whey.
Purity
Low-quality protein shakes often contain fillers and additives that result in less protein per serving. Whey protein isolates contain 90 percent or more protein by weight. Compare this to whey protein concentrates, which can contain anywhere from 29 to 89 percent protein, according to McKinley Health Center at the University of Illinois. This makes whey protein isolate a much more pure form of protein compared to other types of whey protein.
Amount
A critical aspect of getting the most out of each of your protein supplement is the amount of whey protein isolate you use per shake. Use too much, and your body will not absorb it all. The optimal amount of whey protein per shake is about 15 g, according to Helen Kollias, Ph.D. Whey protein can be absorbed by your body at a rate of about 8 to 10 g per hour. Whey protein navigates your gastrointestinal tract within about 1.5 hours. So, maximum absorption is achieved by consuming no more than 15 g of whey protein isolate per sitting.
Evaluation
Choosing a specific whey protein isolate powder can be a daunting task as so many options are available. The best approach is to find one that is within your budget, has at least 90 percent protein content and contains little if any fillers or additives. Once you've found one that fits these basic criteria, consult your doctor and discuss whether that particular supplement is a good fit for you.
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