Almost daily, in the news there is an article debating the benefits of soy protein or the unhealthy risk associated with consuming it. Well, I have decided to provide you with some information from the Bariatric Guide to the Take Shape for Life/Medifast program.
Not All Soy Protein Is Created Equal (excerpt from The Medifast Bariatric Plan) For more information click on Soy Overview
Medifast's soy-based meal replacements are made from isolated soy protein (Solae brand), with its naturally-occurring isoflavones (genistein, daidzein and glycitein) working together to yield health benefits. An innovative water-based technique is used to separate carbohydrate and fat from the soy protein, while maintaining healthy isoflavones. Other processing methods, like alcohol-extraction, remove a substantial amount of isoflavones and their anti-atherogenic properties.
Soy is a complete protein whose quality is similar to that of meat, milk, and eggs. Using the FDA recommended method of qualifying a protein, Protein Digestibility Corrected Amino Acid Score (PDCAAS), Medifast's soy protein has the highest achievable score (1.0). In addition to high digestibility, it contains all essential amino acids, including methionine and arginine.
Bottom Line: Medifast meal replacements are made from the highest quality soy protein with the highest levels of naturally occurring isoflavones.
Quality of Protein (excerpt from The Bottom Line... Soy and Health. For more information click on: Bariatrics Guide)
The quality of protein ingested is important for people who are on a reduced calorie intake and have undergone any bariatric surgery. There are several different proteins available.
The quality of protein is measured by its "protein digestibility corrected amino acid score" (PDCAA). The scoring system was established in 1991 as a superior method of evaluating protein quality. The PDCAA score indicates the body's ability to use protein for the building blocks that help the body maintain lean muscle mass, among other things.
A PSCAA score of 100 is the highest level possible, indicating the highest quality of protein. The PDCAA score for both soy and whey protein is 100. Medifast meals are made with soy and whey, this providing the highest quality of protein while you lose weight.
Soy is More Than Just Good Source of Protein
(For more information click on: Soy is More Than Just Good Source of Protein - Nutrition - Health and Fitness Tips - American Council On Exercise(ACE))
by Ellie Zografakis, R.D., & Dale Huff, R.D., CSCS
There's no getting away from it - protein supplementation is today’s hot nutritional topic. And everyone has a different take on where that extra protein should be derived from.
In the bodybuilding community, the protein source of choice has long been whey protein, with soy protein coming in a distant second. If you count yourself among the whey devotees, here's some information that may encourage you to take another look at soy.
The two most researched forms of protein supplements are soy protein isolate and whey concentrate.
Soy protein isolate is 90 percent protein on a dry-weight basis, is highly digestible (97 percent) and allows the essential amino acids (valine, isoleucine and leucine, which the body does not produce) to be absorbed across the GI tract.
A water-washed process is used to allow isoflavones to remain intact. All of the gas-producing carbohydrates and fat have been removed.
Whey concentrate is extracted by two processes: micro filtration (proteins are physically separated by a filter) and ion exchange (extracted by specific electronic charges).
Both of these processes are very expensive, which is why whey protein is the most costly protein source on the market. Both soy protein isolate and whey concentrate are high-quality proteins and have a Protein Digestibility Corrected Amino Acid Score (PDCAAS) of 1.0.
Amino acid content:
Glutamine, a nonessential amino acid, is the body's primary carrier of nitrogen to skeletal muscle and other tissues. It helps buffer lactic acid buildup in the blood and muscles, boosts muscle protein activity, increases growth hormone levels and strengthens immune capacity. Soy protein isolate typically contains 10.5 grams glutamine/100 grams protein, while whey concentrate contains 4.9 grams glutamine/100 grams protein.
Arginine plays a key role in stimulating the release of anabolic hormones that promote muscle formation, reducing physiological stress, and maintaining a strong and healthy immune system.
- Soy protein isolate contains 7.6 grams arginine/100 grams protein.
- Whey concentrate contains 2.9 grams arginine/100 grams protein.
For a comlete overview click here to download the entire guide:
Yours in health,
*Grant Hughes is available for speaking engagements and interviews related to health, fitness and nutrition topics.