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Whey protein -all you need to know

Whey is the “gold standard” of all proteins. It accounts for 20% of the protein found in milk, the remaining 80% being comprised of casein. Cow’s milk is approximately 6% protein, and contains a large amount of lactose. The large majority of the lactose is filtered out of the whey via ultrafiltration, causing larger protein molecules to remain, whilst filtering out the lactose and ash. The result– a higher concentration of protein!
Whey is the richest known source of the key branch chain amino acids (BCAA = leucine, valine and isoleucine), needed for tissue repair. It also preserve stores of glycogen within the muscle and prevents protein breakdown during exercise. Studies show that Leucine in particular is important for a great physique. Whey protein has a very large amount of leucine, which could benefit you, in terms of more lean body mass and less body fat! It is rich in all the non essential and essential amino acids, universally recognized as the undisputed king of proteins. It also naturally contains many vitamins and minerals. Whey has a superior biological value (BV) to any other source of protein, yielding a larger amount and more optimal ratio of muscle-building amino acids, than any other protein known to man. Whey protein is a more complete protein than any other source, it does not inhibit the absorption of other nutrients and is very easily digested and rapidly absorbed into the bloodstream. This means that the muscle building amino acids can be utilized more quickly and efficiently. Whey protein has little carbohydrates and fat, thus it is perfect for any low carbohydrate or low glycemic index diet plan. Whey protein intake promotes enhanced immune system function, elevating plasma levels of gluthione (the most powerful water soluble antioxidant in the body). This is possible by virtue of a large quantity of cysteine (the American cancer society did research which showed that women with the highest levels of plasma cysteine had a 56% reduction in breast cancer) . Whey is used to fight many cancers due to it’s ability to raise gluthione levels.Lactoferrin is also a constituent of whey protein, a prebiotic which defends the body against micro-organisms, which can cause gastric infections, damage to the colon and food poisoning. Immunoglobulins (attack toxins which cause infections, diarrhea, dehydration and muscle aches) have a similar function.
Whey protein contains Alpha–lactalbumin, a protein fraction containing the highest concentration of tryptophan (a natural amino acid relaxant) in any protein source, with studie showing that whey is useful in improving mood and levels of serotonin. This can help you cope better with stress, and reduce levels of cortisol (the body’s anti-catabolic hormone). Some studies show that whey improves the condition of hypertension, by normalizing blood pressure. Studies also show that whey protein can be of benefit to those with diabetes, by way of slowing the absorption of glucose into the bloodstream. This is also useful for weight management , as it improves the body’s ability to burn fat and prevents fat storage. Certain bio-active components of this wonder protein can lower HDL cholesterol (bad cholesterol) and increase LDL cholesterol (good cholesterol) . This amazing protein has even been proven to be twice as effective as the soy (which is promoted for it’s health benefits) at battling cancer. The incidence of tumors was reduced by a factor of 2 when soy was replaced by whey in clinical trials. It even depletes cancerous cells of gluthione, making them more susceptible to chemotherapy!
By supplementing with whey protein, you can supply your body with an optimal profile of amino acids, in addition to that from the inferior protein that you glean from your diet. By using whey protein you can up your protein intake, without increasing intake of fat and sugar. It also boosts the immune system to boot! So if you want to be lean, strong, well defined and healthy, you can’t go wrong by supplementing your diet with whey protein!
 
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Not everything I would like to know. I have yet to get any answers on the following.

How is Whey made/processed? Are there different methods for making and processing? What are they? There is apparently a wide range in the cost of "base" whey proteins that supplement companies use, depending on how it was made and processedon made and precessed, so what accounts for this range in costs? What are the pros and cons of the different "types/$$$" of whey proteins?
 
"Whey protein concentrate is derived from
sweet dairy whey (milk). The process is through an ion-exchanged
filtering process in which fat, lactose, carbohydrates and
other materials are removed from the final product. Whey
Protein Concentrate can be sourced at 35% to 80% protein
per final product.

Isolates, Cold-Filtration, Microfiltration and
Ion-Exchange, are protein powders that are the next steps to
further process whey protein concentrate. The
Cold-Filtration process is a procedure of separating the proteins
through the use of micro filtering the mass all while using a cold
or “chilled” process (environment). These filters allow the protein
to be removed from the unwanted fat, lactose and the like.
Cold-Filtration Isolate is virtually fat free and lactose (sugar) free.

So what is the difference between Cold-Filtration and Microfiltration?
They both use the same extraction process of filtering, but the
Cold-Filtration is just that, the liquid mass is chilled and then
filtered. As well the mass is then sprayed dried in a non heat
environment to preserve the undenatured proteins.

Using the Cold-Filtration method, the overall protein is said to only
be 0-3% denatured, in comparison to other proteins that can be denatured
up to 15%. Whey Protein Isolate Cold-Filtration is very high in bioactive
whey protein fractions, including immunoglobulin, lactoferrin and
glycomacropeptides."


A final note on processing, casein is manufactured by taking skim milk and subjecting it to an acidification process to seperate it from the whey. This process is harsh and denatures the protein as well as destroying microfractions; milk isolate is microfiltered.



Whey is over hyped as a general use protein and I only recommend its use around training. From a protein quality standpoint it is no better than any other dairy or egg source, egg and dairy proteins all receive a perfect score on the PCDAAS. Whey may have the highest levels of BCAA's but not by much and is low in glutamine content compared to other sources. My whey isolate has 23.7g of BCAA's and 6.5g of glutamine per 100g of protein. It also provides 20% of the USRDA of calcium from one serving(70cc scoop). Milk isolate has 20.6g of BCAA'S and 10.3g of glutamine per 100g of protein. One 70cc scoop provides 35% of the USRDA of calcium and 50% of vitamin C as well as magnesium. If you consume one hundred grams of whey protein you're getting a whopping 3.1g more BCAA's than if you consumed the same amount of milk isolate but you would be getting 3.8g more glutamine as well as more calcium, vitamin c and magnesium. Since milk isolate is micro filtered it also possesses intact undenatured microfractions. The casomorphins also slow protein digestion creating a more sustained released of amino acids. In a fasted state it appears that whey appears to have much of its amino acids converted to palin glucose due to its rapid absorption. For a general use protein powder I prefer milk isolate and for post workout I prefer whey.
 
Good job guys

SPORT SCIENTIST,

I'm not sure you can get much Alpha–lactalbumin in the whey you buy
I think most of it is destroyed during the process
 
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