SOY PROTEIN

SOY PROTEIN Healthy or NOT?

Few people understand soy protein and sucralose. Mr. Reynolds owns a nutrition manufacturing company. His thoughts on SOY PROTEIN:

Soy is the protein source found in the MXI protein bar. Soy is an excellent source of protein. There is not Soy Protein added to any other MXI product. The allergen statement shows "May Contain" or "Contains" Soy because SOY is one of the 6 major allergens determined by the FDA and USDA in the 2006 Allergen Label Law that took effect January 1, 2006.

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Soy is a common ingredient used in the manufacturing process of lecithin and there may be very small amounts used even in a flavoring system. The allergen statement is required for protection of children and adults suffering from severe allergies and should not be considered part of the ingredient declaration. There is not SOY added necessarily. This holds true for "Milk" as well. There is not "Milk" added to our product there is simply a disclosure needed because some of our ingredients may contain trace amounts of cream extracts or other milk derivatives.

As for Sucralose, research this link: www.sucralose.org learn firsthand the true facts. The myths that Dr. Mercola and others purport on the internet are bogus and unfounded. The attack on sucralose is because it creates interest in their newsletters. In fact, the idea that chlorine from sucralose can cause problems is a bit of a stretch. The fact is, you will absorb more Chlorine in your body in one hot shower than you will eating our protein bar every day for a year with the amount of sucralose found in the MXI protein bar.

STATEMENT CONCERNING SOY PROTEIN AND CHOLESTEROL
A recent report of the Nutrition Committee of the American Heart Association on Soy, Isoflavones and Cardiovascular Health has caused some confusion about the heart health benefits of soy protein.
We agree with the American Heart Association (AHA) that soy protein plays an important role in a heart healthy diet. Rich in polyunsaturated fats and low in saturated fats, soyfoods also contain dietary fiber, deliver high-quality lean protein and contribute key vitamins and minerals, such as calcium and potassium. Soyfoods are a delicious and nutritious part of a healthy, balanced diet.
-          Soy foods can replace less healthy foods that are high in saturated fat and cholesterol. Overall, they should be considered beneficial because of their high content of polyunsaturated fats, fiber, vitamins, minerals and low content of saturated fat.
-          A strong body of research into soy protein and heart disease prevention has prompted many health experts to endorse the value of soy protein within a low fat, low cholesterol diet. In 1999, The Food and Drug Administration (FDA) approved an unqualified health claim in support of soy's heart health benefits, which came in response to a body of scientific evidence compiled, reviewed and presented by The Solae Company. The approved health claim is based on scientific evidence from more than 50 independent studies.
-          Since that time, other six health authorities around the world including, Korea, Japan, Brazil, Philippines, Indonesia, and UK have approved claims in support of FDA's conclusion that soy protein consumption benefits heart health.
-          The Solae Company will continue to invest in nutrition research that helps consumers make more informed decisions about what they eat. As a leader in the research and application of soy protein, we have a responsibility to ensure sound scientific evidence is readily available to consumers.

MYTHS about SOY PROTEIN

The MYTH and the TRUTH based on SCIENCE

Myths and Misconceptions about Soy Protein
For the Performance Nutrition Audience

Myth 1:
Soy protein is not a complete protein.
Fact 1:
Soy protein is, in fact, a complete protein. Soy protein meets or exceeds the essential amino acid requirements for ages 2 years and older including children, adolescents, and adults.1-5 For individuals exercising, training and building muscle, soy protein can be used as a source of high quality protein to help satisfy the higher need for protein during muscle-building, and provide the necessary essential amino acids for physical and muscular development.6-12 People may be confused because many vegetable proteins are considered to be incomplete proteins - meaning that some key essential amino acids are missing or occur in levels too low to meet the body's needs. Without adequate amounts of all of the essential amino acids, the quality of a protein is limited.

This, however, is not the case for soy protein. Soy protein, has the essential amino acid profile which meets or exceeds that required for human growth, development and maintenance as recognized by the Food and Agriculture Organization of the United Nations (FAO)/World Health Organization (WHO) - the scientific agencies on human nutrition and health worldwide.1

Myth 2:
Soy protein is an inferior protein because its Protein Efficiency Ratio (PER) or Biological Value (BV) values are not as high as in whey.
Fact 2:
Soy protein is a high-quality protein equal to whey, egg or beef protein.1-3, 6-11

PER, BV and even NPU (Net Protein Utilization) are old measures of determining protein quality for humans. Alternatively, PDCAAS (Protein Digestibility Corrected Amino Acid Score) is the method recognized and implemented by many agencies, including the U.S. Food and Drug Administration (FDA) and the FAO/WHO, to determine protein quality of foods for human consumption.1, 13

PDCAAS is based on human essential amino acids requirements. Measures such as PER are based on rodent requirements for essential amino acids, which differ from human amino acid requirements. PER measures the ability of a protein to support the growth of young growing rats, not humans. In the past the results of PER protein quality testing have been extrapolated to humans.

CONTINUED MYTH FACTS

PER measures the ability of a protein to support the growth of young growing rats, not humans. In the past the results of PER protein quality testing have been extrapolated to humans.

Alternatively, PDCAAS is based on the content of essential (or indispensable amino acids), protein digestibility, and the ability of the protein to meet human essential amino acid requirements. The standard, essential amino acid profile used in PDCAAS is for young growing children, two- to five-years of age, as determined by FAO/WHO/UNU (United Nations University). Why? Next to infancy, it is the most demanding period of human growth and development.

The highest possible PDCAAS a protein can receive is 1.0, which means the protein provides all of the essential or indispensable amino acids in the correct amounts and proportions for a two- to five-year old. Isolated soy protein, casein, whey, and egg white all achieve the PDCAAS of 1.0 (beef receives a 0.92 because it is limited in tryptophan).2

Why do people continue to cite old methods and measurements? Perhaps it's due to lack of knowledge in the protein metabolism field. As it relates to performance nutrition, progressive exercise physiologists, nutritionists and coaches are aware of the PDCAAS method to determine protein quality of a food. This has helped create a better understanding of soy protein quality and the benefits of soy protein.

Myth 3:
Soy protein does not have the key amino acids needed for muscle building.
Fact 3:
Soy protein contains all of the key or essential amino acids for muscle building, plus two amino acids known to enhance immune function - arginine and glutamine.2, 14-16 Both arginine and glutamine, although produced in the body, at times during stress may be produced in lower quantities. It is known that these amino acids help in muscle building17 and help to support immune system health. A value of soy protein (when compared to animal-based proteins) is that it contains higher amounts of glutamine and arginine. In fact, soy protein isolate contains almost three times as much arginine and almost twice as much glutamine as whey.2, 15

Soy protein isolate has comparable amounts of the branched chain amino acids (leucine, isoleucine and valine) as animal-based proteins.2 These amino acids may play a key role in muscle building, may help to prevent central nervous system fatigue.

FACTS in RESPONSE TO SOY MYTHS

Myth 4:
Soy protein is a soft protein; whey protein is a strong protein.
Fact 4:
Amino acids from proteins, regardless of source, will be used by the body for building muscle and delivering energy in exactly the same way. Therefore, there are no "soft" or "hard" proteins. Soy protein is a high quality protein, equal to meat, milk, and eggs. As a plant-based high quality protein, soy protein provides all of the essential amino acids to support muscle building, performance and recovery.

This myth implies that soy protein does not have the "muscle" to provide the necessary amino acids needed by body builders and athletes to deliver energy and develop muscle. Such beliefs were likely predicated on the old PER and BV values for protein quality measures. Soy protein's quality PDCAAS score of 1.0 (equal to casein, whey and egg) and the presence of key amino acids - glutamine, arginine, and branched amino acids - dispel this myth.2, 15

In addition, the body cannot tell the difference between the sources of the protein - vegetable or animal. If there is something significantly limiting in a protein source, such as essential amino acids, the body will not respond as efficiently to exercise. A protein's source does not affect the method by which the body uses amino acids to build muscle and deliver energy. Therefore, classifying a complete protein as "hard" or "soft" is incorrect.

Myth 5:
Soy protein does not build muscle like whey.
Fact 5:
Soy protein is a muscle-building protein.
Whether from soy, casein, whey or egg, a complete protein provides the body with the elements from which to build muscle or deliver energy. Soy protein contains the required levels of essential amino acids in addition to glutamine and arginine.2, 15 In fact, soy protein isolate contains almost three times as much arginine and almost twice as much glutamine as whey.23

Suggestions that soy protein builds lean muscle while whey protein builds muscle mass, again, do not make sense. A protein that has all the essential amino acids and is digestible is used to develop a lean muscle structure or a structure with higher proportions of muscle mass when combined with muscle building exercise. Type of exercise, such as endurance and strength training, will impact the body's dietary protein needs. In addition to type of exercise, dietary protein requirements for exercise also depend on exercise intensity, as well as the age and gender of the exercising person.