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The primary usage of whey protein supplements is for muscle growth and development. Eating whey protein supplements before exercise will not assist athletic performance, but it will enhance the body's protein recovery and synthesis after exercise because it increases the free amino acids in the body's free amino acid pool. [20]
For bodybuilders, whey protein provides amino acids used to aid in muscle recovery. [15] Whey protein is derived from the process of making cheese from milk. There are three types of whey protein: whey concentrate, whey isolate, and whey hydrolysate. Whey concentrate is 29–89% protein by weight whereas whey isolate is 90%+ protein by weight.
Containers of whey protein being sold at a health food store. Whey protein is commonly marketed as a dietary supplement, and various health claims have been attributed to it in the alternative medicine community. [18] Although whey proteins are responsible for some milk allergies, the major allergens in milk are the caseins. [19] [20]
This includes casein, caseinates, whey products (including whey butter and whey cream), cultured milk products (including yogurt, sour cream and cultured buttermilk), ultrafiltered milk, milk protein concentrate, milk serum proteins and fats.
Whey: The liquid remaining after milk has been curdled and strained. It is a by-product of the manufacture of cheese or casein and has several commercial uses. Whey protein: A mixture of globular proteins isolated from whey, the liquid material created as a by-product of cheese production. Whipped cream
A meta-study concluded that intake of protein supplements higher than around 1.6 g/kg/day do not further improve the gains in FFM (fat free mass) [3] “at least for younger individuals”, [3] with a confidence interval from 1.03 to 2.20 [3] so “it may be prudent to recommend ~2.2 g protein/kg/d for those seeking to maximize resistance ...
Beta-lactoglobulin is a small whey protein with a molecular mass of around 18400 Da . [50] It is resistant to heating and enzymatic degradation; structurally, it has a beta-barrel associated with binding to small hydrophobic molecules such as fatty acids , forming stable polymers .
The major protein in whey is β-lactoglobulin, followed by α-lactalbumin (β-lactoglobulin ≈ 65%, α-lactalbumin ≈ 25%, serum albumin ≈ 8%, other ≈ 2%). β-lactoglobulin is a lipocalin protein, and can bind many hydrophobic molecules, suggesting a role in their transport. β-lactoglobulin has also been shown to be able to bind iron via siderophores [7 ...