[ Q ] What are the various types of protein powders available?
[ Q ] What is the best source of protein?
For instance, whey is quickly digested, improves immune function, and has the highest amount of BCAA's. Soy, on the other hand, improves cholesterol and lipid profiles, improves kidney function, and has a very high amount of the important amino acid glutamine.
[ Q ] Isn't soy protein an inferior protein source?
Need more proof? Here are two conclusions from peer reviewed published papers: "Soy and whey protein bar products both promoted exercise training-induced lean body mass gain (in humans), but the soy had the added benefit of preserving two aspects of antioxidant function, "... and..." The degree of the decrease of the muscle weights, especially soleus muscles, of rats fed the SPI diet was smaller than that of rats fed the casein diet.
Therefore it is suggested that SPI caused a reduction of the proteolysis of myofibrillar protein in skeletal muscles through a reduction of calpain and proteasome activities, in consequence to ameliorate the muscle atrophy."
|What Is Calpain?
A proteolytic enzyme that is regulated by the concentration of calcium ions.
Here we see two studies which show that soy protein isolate is superior in some aspects to both casein and whey proteins. Even whey-only promoters such as Will Brink have come to realize that soy protein isolate is a beneficial protein source.
[ Q ] Won't soy protein create estrogenic problems, especially for men?
Need more evidence? In one study, male monkeys were fed soy containing significant amounts of isoflavones and another group was fed soy with the isoflavones removed. No differences were noted between the two groups on testosterone, DHEAS, sex hormone binding globulin (SHBG), testicular weight, etc.
[ Q ] What are the different types of casein proteins on the market?
[ Q ] What are the differences between micellar casein and the caseinates?
Micellar casein will either be called "micellar casein" or "milk protein isolate/concentrate." They are exactly the same thing as both are mostly micellar casein with a small amount of whey.
[ Q ] Should I buy protein concentrates or isolates?
With casein and whey proteins, both can be very valuable protein sources depending on your goals. In general though, the isolated proteins are your best bet unless economics is your only consideration. Isolates taste better and have nearly no fat or carbohydrates.
[ Q ] Is hydrolyzed whey superior to regular whey protein?
However, for the average person, it is a worse source of protein than the non-hydrolyzed version. Remember that whey is already an extremely fast-digesting protein source.
There is no need to increase rate of protein digestion beyond what nature already intended.
Even worse, hydrolyzing the protein denatures the protein and all of its beneficial growth factors and immunoglobulins which could severely affect the overall health and growth benefits of the whey.
[ Q ] What about added enzymes?
[ Q ] Should I consume a protein powder consisting of only one type of protein powder or should I consume mixtures.