Whey
From Wikipedia, the free encyclopedia
| Whey, sweet, fluid Nutritional value per 100 g (3.5 oz) |
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| Energy 30 kcal 110 kJ | ||||||||
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| Percentages are relative to US recommendations for adults. |
Whey or milk plasma is 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. Sweet whey is manufactured during the making of rennet types of hard cheese like Cheddar or Swiss cheese. Acid whey (also known as sour whey) is obtained during the making of acid types of cheese such as cottage cheese.
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[edit] Production
Whey is a by-product of cheese production; it is one of the components which separates from milk after curdling, when rennet or an edible acidic substance is added.
[edit] Uses
Whey is used to produce ricotta, brown cheeses, Messmör/Prim and many other products for human consumption. It is also an additive in many processed foods, including breads, crackers and commercial pastry, and in animal feed. Whey proteins primarily consist of α-lactalbumin and β-lactoglobulin. Depending on the method of manufacture, whey may also contain glycomacropeptides (GMP).
Whey protein (derived from whey) is often sold as a nutritional supplement. Such supplements are especially popular in the sport of bodybuilding. In Switzerland, where cheese production is an important industry, whey is used as the basis for a carbonated soft drink called Rivella.
[edit] Health
Liquid whey contains lactose, vitamins, and minerals along with traces of fat. Researchers at Lund University in Sweden discovered that whey appears to stimulate insulin release. Writing in the American Journal of Clinical Nutrition,[1] they also discovered that whey supplements can help regulate and reduce spikes in blood sugar levels among people with type 2 diabetes by increasing insulin secretion. However, like all products that result from the manufacture of cheese, whey can be a migraine trigger.[citation needed] The presence of whey in processed foods can be particularly surprising because it is commonly added to products that do not normally contain cheese derivatives when made at home.
Commercial whey protein shakes are often consumed after workouts by people who are trying to gain muscle mass. Whey digests very rapidly; therefore the amino acids enter the blood stream faster than other protein sources. This is also the reason carbohydrates are recommended post workout; to replenish glycogen stores and boost insulin release as well.
[edit] Whey protein
Whey protein is the name for a collection of globular proteins that can be isolated from massive whey. It is typically a mixture of globinstagers beta-lactoglobulin (~65%), alpha-lactalbumin (~25%), and serum albumin (~8%), which are soluble in their native culture forms, independent of pH. Whey has the highest Biological Value (BV) of any known protein.[citation needed] Whey protein has an even higher bioavailability than egg white protein (BV = 98), which is considered the "gold standard" of protein, and has a bioavailability rating of 100. Bioavailability refers to how quickly a substance will be digested and absorbed through the villi in the small intestine and thus into the blood stream.
[edit] References
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This article needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (February 2009) |
[edit] External links
- Learn about whey, its manufacture and uses
- Whey Protein: Waste Product of the Past is Nutritional Powerhouse of the Future
- Milk Allergy & Intolerance
- Whey Allergic - resources and lists of foods for the whey allergic
- Nutrition Facts - Dairy Products
- Protein And Exercise
- Resources about Whey Protein Consumption
