Is animal based and a derivative of milk production. It is obtained by coagulating and removing the curd (casein) during cheese production. After it is separated from milk, whey contains almost all of the vitamins and minerals, 50% of the milk solids, and 20-24% of the milk proteins.
Whey proteins are unique in that they contain high levels of essential amino acids, which include lycine, methionine, cystine, and branched-chain amino acids (leucine, isoleucine and valine).
Whey is considered an excellent source of protein because of its high biologic value and amino acid composition. The final products are high quality and have received tremendous attention from not only the scientific community, but athletes and health/fitness enthusiasts as well.
Important note for bodybuilders & athletes: Despite the large number of body builders & athletes using whey protein for ergogenic (growth) purposes, there is little scientific evidence demonstrating a growth effect. The primary advantage of whey protein is the rapid availability of amino acids after ingestion. This is not what advertisers lead you to believe.
Is plant based. Using soy is a good way to get less animal food products, which we get too much of. Soy proteins are high in quality and are free from cholesterol and are very low in saturated fat. In addition, there is fiber in soy products along with phytonutrients not present in whey protein.
Soy is a quality equivalent to both casein and various animal proteins and contains high amounts of glutamine and arginine. Recent studies regarding the cardioprotective (heart protection) benefits of soy isoflavones has stimulated an increase in the numbers of people using soy powders. In addition, studies on nitrogen balance indicate that isolated soy is comparable to that of animal proteins.
Soy lacks sulfer-containing amino acids but research shows that well processed soy isolates and soy protein concentrates are essentially equal to those of animal proteins. Soy proteins are also beneficial because of their antioxidant and immune enhancing properties.
Soy is well tolerated and there are no adverse side effects associated with its use.
Measuring Protein Quality:
The FDA (Food & Drug Administration) considers a product to be an "excellent" source of protein if it contains more than 20% Daily Value per cup and "good" if it contains between 10-19% Daily Value per cup; this is based upon a 2,000 calorie per day diet. This "Daily Value" score is determined by taking into account how digestible a protein is, in addition to comparing its essential amino acid profile to the essential amino acid profile needed for growth by a child age 2-5 years.
How does your protein score?
We recommend you consider trying "Juice Plus Complete". It scores in the "EXCELLENT" Category; one serving has a 25% Daily Value, excellent by anyones standards.
Juice Plus Complete is soy-based while whey protein is a component of milk. Both provide protein. Check the labels for comparison and consider your personal choice for taste. The choice is yours!
Author/speaker and an expert in ”Sports Performance Enhancement”. Jack Medina is available for speaking engagements, consultation and personal training of athletes in various sports, professional and amateur. Jack has written a new book, “The Winning Edge: Fueling & Training The Body For Peak Performance” with Dr. Roy Vartabedian, an internationally known New York Times Best Selling Author of the “Nutripoints” program for optimal nutrition. Both books are available online at www.jackmedina.com. Jack also has a monthly ezine (newsletter) available free which can be subscribed to on his website. All subscriber’s addresses will be confidential and not sold or given to any other organization or group.
This article contains copyrighted material. Copies of this article may be reprinted without permission of the author only when this bi-line is included with each copy. Jack can be reached at firstname.lastname@example.org