What is it? A naturally complete protein, meaning that it contains all the essential amino acids required daily to keep your metabolism running high, as well as producing the needed hormones & enzymes, which allow your body to function at peak levels. For those who are lactose intolerant, Whey Protein isolate is a manufacturing process that removes the lactose & dairy fat making it very easy to digest for those who dont do well on traditional dairy. Protein is rated on a Biological Value scale (B.V.) which determines how well it is absorbed, digested and utilized. Whey protein has the highest rating at 104 with nature’s perfect protein the egg white weighing in at 100.
What’s in it? The fiull spectrum of amino acids, as well as being a rich source of Branched Chain Amino Acids (BCAA), isoleucine, leucine, and valine, and contains the highest known levels of any natural food source. The BCAA are important for people who exercise, athletes an elite athletes. Since unlike other amino acids, they are metabolized directly into the muscle tissue and are the first ones used during periods of exercise & resistance training (Intl.J.Food Sciences & Nut.2004). Additionally, the BCAA's are used to offset central fatigue which can be a rate limiting step in the recovery process. Well known sports nutritionist Nancy Clark, ans well as the International Society of Sports Nutrition (ISSN) the National Sports & Conditioning Association(NSCA) all have position stands on the amount (p/kg/bdy/wt) of protein required daily for athletes and individuals who exercise (see links below).
Promotes Lean Tissue Mass: Whey Protein plays a key role in promoting muscle protein synthesis and lean muscle tissue growth. Research has demonstrated that individuals who exercise benefit from a diet high in leucine and have more lean muscle tissue and less body fat compared to individuals whose diet contains lower levels of leucine. Whey has approximately 50% more leucine than soy protein. In addition, it is a rich source of the anti-oxidant Glutathione, which is required for a healthy immune system. Individuals who exercise have consistently demonstrated lower levels of glutathione when they consume proteins that are lower in quality or are less bio-available & difficult to digest (Dr. Donald Layman Univ. Illinois 2004).
Weight Management: Numerous Studies show that achieving and maintaining a healthy weight can add years to your life and can reduce your chances of weight related diseases such as Diabetes Type 2 & High Blood Pressure (American Cancer Society 2005). Whey Protein isolate is a perfect complement to any low carbohydrate, low glycemic index meal plan. Recent studies by Dr. Donald Layman at the University of Illinois have highlighted the role of the amino acid leucine in improving body composition. High quality whey protein is rich in leucine which helps to preserve lean muscle tissue while promoting fat loss. Bio-Available proteins such as whey help to stabilize blood glucose levels by slowing the absorption of glucose (carbohydrates) into the bloodstream. Whey Protein contains bioactive components that help stimulate the release of two appetite suppressing hormones cholecystokinin (CCK) and glucagon-like peptide-1 (GLP-1). The study conducted at the University of Illinois found that whey protein had a greater impact on satiety than casein, the other protein in milk (Dr. Donald Layman University Illinois 2004).
Links: Position Stands on Protein Intake
International Society of Sports Nutrition (ISSN)
National Strength & Conditioning Association (NSCA)https://www.nsca.com/education/articles/whey-protein-vs-casein-protein-and-optimal-recovery/
Leyman, D. "Defining meal requirements for protein to optimize metablic roles of amino acids." http://ajcn.nutrition.org/content/101/6/1330S.full