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Lactalbumin, also known as "whey protein", is the albumin contained in milk and obtained from whey. Lactalbumin is found in the milk of many mammals. Lactalbumin is found in the milk of many mammals. There are alpha and beta lactalbumins; both are contained in milk.
The protein in human milk is approximately 60% whey and 40% casein. [11] The protein fraction in whey constitutes approximately 10% of the total dry solids in whey. This protein is typically a mixture of beta-lactoglobulin (~65%), alpha-lactalbumin (~25%), bovine serum albumin (~8%) (see also serum albumin), and immunoglobulins. [12]
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]
Whey is the type of protein contained in many popular brands of protein supplements and is preferred by many bodybuilders because of its high biological value (BV) and quick absorption rates. Whey protein also has a bigger effect than casein on insulin levels, triggering about double the amount of insulin release. [69]
Whey protein is a popular ingredient, [21] [24] [25] but products may also incorporate casein, soy, pea, hemp or rice protein. A meta-analysis found a moderate degree of evidence in favor of whey protein supplements use as a safe and effective adjunct to an athlete's training and recovery, including benefits for endurance , average power ...
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