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Whey protein is considered a complete protein and contains all 9 essential amino acids and is low in lactose content (isolates and hydrolysates especially as concentrate contains lactose). Its supplementation is done to improve muscle protein synthesis and promote the growth of lean tissue mass by people doing resistance trainings and also by athletes to recover muscles after a workout / training sessions.
There are three primary types of whey protein : whey protein concentrate (WPC), whey protein isolate (WPI), and whey protein hydrolysate (WPH).
Whey protein concentrate - WPC contains low levels of fat and low levels of carbohydrates (lactose). The percentage of protein in WPC depends on how concentrated it is. Lower end concentrates tend to have 30% protein and higher end up to 90%
Whey protein isolate - WPIs are further processed to remove all the fat and lactose. WPI is usually at least 90% protein
Whey protein hydrolysate - WPH is considered to be the "predigested" form of whey protein as it has already undergone partial hydrolysis - a process necessary for the body to absorb protein. WPH doesn't require as much digestion as the other two forms of whey protein.
Whey protein concentrate is considered as the best option as it is the cheapest and retains most of the beneficial nutrients found naturally in whey. Many people also prefer the taste, which is probably because of the small amounts of lactose and fat.
If you have problems tolerating concentrate, or you're trying to emphasize protein while keeping carbs and fat low, then whey protein isolate (or even hydrolysate) may be a better option.
According to a study done in Minnesota a group of people were kept on iso caloric mix beverage and the other half on whey cutting their calorie intake to 500 calories equally. The conclusion came was that those consuming whey lost a greater amount of body fat as compared to the other group and another difference was that their muscles were also preserved. Hence, to shred that extra fat rely or whey protein intake in addition to calorie cut and just sweating in the gym.
Just hitting hard at gym doesn't make the muscles grow big. Protein and more important good protein with high biological value is needed for the after workout recovery and Whey protein stands on top of the table in that terms. There are number of researches done all around the world to prove again and again that bodybuilders who rely on whey protein along with other diet as well gain much more effectively and fast as compared to those who don't. That is why it the most relied and trusted source of protein all over the world amongst top bodybuilders and sportsperson.
According to different research done it is found that supplementing with whey protein by subjects involved in different aerobic, strenuous activities experienced lesser reduction of glutathione level which otherwise tends to deplete when the supplementation was not done, hence improving their immune, nervous and gastrointestinal system.
In a study conducted in Netherlands Researchers put 58 subjects through experimental stress and found that those who consumed whey protein experienced fewer symptoms of depression and seemed in a better mood than those who did not. The conclusion was that there were likely changes in the brain serotonin. Hence a whey protein shake is a better option to keep that stress away.
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Disclaimer: These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat , cure or prevent any disease. Results in testimonials may not be typical and your results may vary. Not all people will obtain the same results and are intended to be used in conjunction with a healthy diet and regular exercise. If you are pregnant, nursing, taking medication, or have a medical condition, consult your health care professional before using products based on this content to avoid any health issues.