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WHEY Protein FACTS!

Whey proteins are not something new, that have been available for hundreds of years. It has only been during the last 15-20 years however that the true potential of whey proteins has become known. This awareness has led to an increase in research activity to identify all the benefits whey proteins provide to the human body.


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Whey proteins are not something new, that have been available for hundreds of years. It has only been during the last 15-20 years however that the true potential of whey proteins has become known. This awareness has led to an increase in research activity to identify all the benefits whey proteins provide to the human body.

Q: Why does the body need protein?
A: protein is a nutrient made up of amino acids. There are 2 types of amino acids. Non essential amino acids can usually be synthesized by a healthy body from the foods we eat each day. The Essential amino acids however must be obtained through the daily diet.

protein has a number of important roles in the body, including:

Repair of body cells
Build and repair muscles and bones (cellular level)
Provide a source of energy
Regulate many important metabolic processes in the body

Q: What is whey protein?
A: whey proteins are high quality and nutritious dairy proteins. Milk contains 2 primary proteins, Casein and whey protein. When cheese is produced, the liquid whey separates from the "Curd" or Casein. The whey proteins are then separated from the liquid whey and purified to various concentrations of whey protein.

Explained below is the composition of milk:

COMPOSITION: WHOLE MILK
water 87%
SOLIDS 13%

COMPOSITION: MILK SOLIDS:
fat 30%
ASH/MINERALS 6%
LACTOSE 37%
protein 27%

COMPOSITION : MILK PROTEIN
whey protein 20%
CASEIN 80%


Q: Are all whey proteins alike?
A:  The composition of whey protein products will vary based upon several factors including:
  • Source of milk
  • Method of Production
  • Type of cheese being Produced
  • Individual Manufacturer Specifications


Q: What Individual protein Components are found in Whey?
A: whey proteins are not a single protein but consist of a number of individual protein components. In recent years new technology has enabled manufacturers to isolate and further purify some of these individual components. Many are now available in an isolated form. The following is a list of the individual components in whey protein.
  • BETA-LACTOGLOBULIN
  • ALPHA-LACTALBUMIN
  • BOVINE SERUM (Albumin (BSA)
  • GLYCOMACROPEPTIDE (GMP)
  • LACTOFERRIN
  • LACTOPEROXIDASE
  • LYSOZYME


Q: How does whey protein compare to other protein sources?
A: whey protein is a high quality Complete protein containing all of the essential amino acids required by the body each and every day.

This is  based upon several different methods that are used today to evaluate protein quality. No matter which method is used, whey proteins have been proven to be an excellent, pure source of protein!

whey proteins have a protein Digestibility Corrected Amino Acid Score (PDCAAS) of 1.14.  The reported score of 1.0, which is the maximum value allowed by the United States Department of Agriculture (USDA)  The PDCAAS is the USDAs officially approved method of scoring protein quality.

Another method used to measure protein is the protein Efficiency Ratio (PER) . whey proteins have a PER of 3.2, making is one of the highest single sources proteins. the PER rating is based upon the evaluation of the growth of animals consuming a fixed amount of dietary protein from a single source. As the PER increases, so does the quality of the Protein.

Biological Value (BV) Another measure of protein quality, measures the amount that is retained from the absorbed protein for the maintenance and growth. It measures the fraction of the nitrogen in the diet that remains after the nitrogen losses in the waste products have been subtracted. whey proteins have a biological value of 100, which is higher than the value of Casein (milk Protein), soy protein, beef or gluten wheat.

Q: Should individuals with a lactose intolerance and or milk allergies avoid whey protein?
A: whey protein, at a concentration of 80%, contains between 5 -6% lactose, whey protein isolate contains les than 1% lactose **. The low levels of lactose in both of these products can usually be well tolerated by individuals with lactose intolerance. In many cases other dairy products (up to 2 cups per day) can also be well tolerated, provided they are consumed at meal time with other foods.

If a person is allergic to milk protein (less than 1% of the population) it is important to know if the allergic reaction is caused by the Casein, whey, or both.

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This Article appears in:
Vitamins and Supplements
  
Keywords:
protein, Nutrition, whey,
           
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