Mayur Deshpande
  Personal trainer in Mumbai
Nutritional Supplements Library Whey Protein

Nutritional Supplements Library

Whey Protein

1. What is whey protein?

2. Whey Protein is composed of Four Main Fractions and Six Minor Fractions:

3. Essential Amino Acid Content of Selected Proteins (mg/g protein)

4. Whey protein content in milks

5. How is whey protein made?

6..What are the benefits of whey protein?

7. How Are Whey Protein Concentrate and Whey Protein Isolate Different?

8. What Is Hydrolyzed Whey Protein?

9. What Are The Side Effects of Taking Whey Protein?

10. Are all whey proteins the same?

11. How does whey protein compare to soy protein?

12. Why the body needs frequent protein replenishment

What is whey protein?


Whey protein is a co-product of the cheese making process; it is the name for a collection of globular proteins that can be isolated from whey, a by-product of cheese manufactured from cow's milk. It is typically a mixture of beta-lactoglobulin (~65%), alpha-lactalbumin (~25%), and serum albumin (~8%), which are soluble in their native forms, independent of pH. Whey has the highest biological value (Isolated Whey =100 and Whey protein concentrate =104)of any known protein. Whey is a component of milk. Simply put, it's the protein that remains after the cheese-making process uses, up casein molecules. There are other specific points: Liquid milk contains about 6.25% protein. Of that protein, 80% is casein and the remaining 20% is whey.
Whey is a complete protein, featuring all essential and non-essential amino acids. Whey also contains the highest concentrations of BCAAs for any protein in nature. (BCAAs comprise 47.5-50.5% of the essential amino acid profile of a good whey protein.) . Whey is comprised of nitrogen-containing compounds. The amounts of these globular protein fractions depend upon breed of cow, time of year, type of feed, country of origin, and lactation cycle of the animal. . These many variables add up to a wide-ranging diversity of protein fraction percent-ages and amino acid profiles among different whey protein powders. The type and quality of processing (filtering, ion exchange, heat temperature, acids or enzymes) explain other variations.

Whey Protein is composed of Four Main Fractions and Six Minor Fractions:

• Major Fractions % in Whey Molecular Weight (MW)
• Beta -lactoglobulin 46- 57% 18,400- 36,800 Daltons
• Alpha-lactalbumin 12 - 25% 69,000 Daltons
• Bovine serum albumin Approx. 10%' 69,000 Daltons
• Immunoglobulins Approx 10% 15,00 - 16,000+ Daltons

Minor fractions (peptones): lactoferrin, Lacto peroxidase, lysozyme, relaxin, lactollin and B-microgIubuIin. Lactoferrin, lactoperoxidase, and lysoyme have antibacterial, antimicrobial properties. It is the precise ratios and amounts of each and every one these components that give a well-made whey protein its muscle building and health- promoting properties.

How is whey protein made?

Whey protein is a co-product of the cheese making process. Listed below is a brief description of the steps involved in making BiPro pure whey protein isolate.
• Fresh milk is tested, approved by Quality Assurance experts and pasteurized.
• The casein, or "curd", and a portion of the milk-fat are separated out to make cheese.
• The remaining liquid whey goes through a series of fine, specialty filters to separate the whey protein from the lactose and other ingredients in the liquid whey.
• Concentrated liquid whey enters an ion exchange tower to further concentrate and purify the whey protein. Ion exchange is a gentle process and does not denature, or "break down", the whey protein.
• Next, the product enters a drying tower to remove water.
• The final step is to package the pure whey protein isolate powder into various size containers for use.

What are the benefits of whey protein?

• Compared to other proteins, on a gram-to-gram basis whey protein isolate delivers more essential amino acids to the body but without the fat or cholesterol.
• Whey protein concentrate also was found to be a potent inhibitor of oxidized low density lipoprotein cholesterol. Current research suggests that the conversion of LDL to oxidized LDL is the trigger that leads to atherogenesis(blocking the blood supply to heart)... the formation of the plaque and lesions associated with atherosclerosis.
• The body requires more energy to digest protein than other foods (thermal effect) and as a result you burn more calories after a protein meal.
• Whey powder is commonly used by bodybuilders and athletes desiring to accelerate muscle development and aid in recovery,to Repair body cells ,Build muscles and to Provide a source of energy.
• Whey protein isolate is pure protein with little to no fat or carbohydrates. It is a perfect complement to any low carbohydrate or low glycemic index diet plan.
• Protein helps to stabilize blood glucose levels by slowing the absorption of glucose into the bloodstream. This in turn reduces hunger by lowering insulin levels and making it easier for the body to burn fat.
• Whey protein contains bioactive components that help stimulate the release of two appetite-suppressing hormones: cholecystokinin (CCK) and glucagon-like peptide-1 (GLP-1).
• Whey protein intake improves nitrogen balance; Nitrogen balance refers to the condition in which the amount of dietary nitrogen intake is equal to the amount of nitrogen excreted. If the nitrogen balance is positive, this indicates that there may be a net growth in body tissues.

How Are Whey Protein Concentrate and Whey Protein Isolate Different?

first generation whey protein powders contain as low as 30-40% protein and high amount, fat and undenatured proteins. They are categorized as a whey concentrate and mostly used by food industry for baking. Modern concentrates of whey protein now contain as high as possible with reduced amount of lactose,this is achieved through ultra filtration processing which removes lactose, thus elevating the concentration of whey protein so they are called whey pretin isolate.

What Is Hydrolyzed Whey Protein?

The process of hydrolysis breaks the protein chains down into smaller segments called peptides. Hydrolyzed whey protein is more easily digested and has a reduced potential for allergic reactions versus non-hydrolyzed whey protein. The quality of the protein, however, remains very high.

What Are The Side Effects of Taking Whey Protein?

There are no documented side effects provided a person does not have an allergy to dairy proteins or is lactose intolerant. If you have a dairy protein allergy please consult your physician before taking whey protein. If you are lactose intolerant choose a whey protein isolate which contains trace amounts of lactose, if any. Whey protein is a complete high quality protein and should be an acceptable protein source also for healthy pregnant women and children provided they are not allergic to dairy proteins. The second most abundant component in whey protein is alpha-lactalbumin, which is one of the main whey proteins in human breast milk. Infant formulas, including those for premature infants, often include whey protein. Whey protein is an easily soluble, very easy to digest protein.

Are all whey proteins the same?

There may be a major difference in the quality of whey protein based upon the following factors:
• Source of Milk
• Production Method
• Type of Cheese Produced
• Individual Manufacturer Specifications
• Added Ingredients

How does whey protein compare to soy protein?

Whey protein is a nutritionally complete protein. It contains bioactive ingredients, like immunoglobulins and lactoferrin that help support the immune system. Athletes prefer whey protein to soy protein due to its rich abundance of branched chain amino acids and its quick absorption rate. These are important to help repair and rebuild muscles after a workout or competitive event. Whey protein has a fresh, neutral taste compared and will not change the taste of foods you add it to. Whey protein does not contain isoflavones or any other components with potential hormonal effects.

Why the body needs frequent protein replenishment

Amino acid pools provide amino acids for the protein synthesis necessary to create/repair/rebuild muscle, skin, hair, nails and other tissues. Amino acids are constantly lost in sweat, urine and feces. Some are also used for fuel during exercise. The pools must be replenished either from the breakdown of body tissues (obviously not desirable) or the consumption of dietary protein. As the bi-directional arrows between body protein and amino acid pools in the diagram indicate, the pools are in constant turnover, necessitating the consumption of protein at regular intervals.