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. Whey is used to produce ricotta and gjetost cheeses and many other products for human consumption. It is used as an additive in many processed foods, including breads, crackers and commercial pastry. In addition, whey is used as an animal feed. Whey proteins mainly consist of a-lactalbumin and ÃŸ-lactoglobulin. Depending on the method of manufacture, it may also contain glycomacropeptides (GMP). The whey protein separated from this mixture is often sold as a nutritional supplement. Such supplements are especially popular in the sport of bodybuilding. 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 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. Butter is a dairy product made by churning fresh or fermented cream or milk. Butter is used as a spread and a condiment, as well as in cooking applications such as baking, sauce making, and frying. As a result, butter is consumed daily in many parts of the world. Butter consists of butterfat surrounding minuscule droplets consisting mostly of water and milk proteins. The most common form of butter is made from cows' milk, but can also be made from the milk of other mammals, including sheep, goats, buffalo, and yaks. Salt, flavorings, or preservatives are sometimes added to butter. Rendering butter produces clarified butter or ghee, which is almost entirely butterfat.Butter is the most complex food with 150 chemical comounds of fats, protien, sugars,etc. When refrigerated, butter remains a solid, but softens to a spreadable consistency at room temperature, and melts to a thin liquid consistency at 32â€“35 Â°C (90â€“95 Â°F). Butter generally has a pale yellow color, but varies from deep yellow to nearly white. The color of the butter depends on the animal's feed and is sometimes manipulated with food colorings, most commonly annatto or carotene. The term "butter" is used in the names of products made from purÃ©ed nuts or peanuts, such as peanut butter. It is also used in the names of fruit products, such as apple butter. Other fats solid at room temperature are also known as "butters"; examples include cocoa butter and shea butter. In general use, the term "butter", unqualified, almost always refers to the dairy product. The word butter, in the English language, derives (via Germanic languages) from the Latin butyrum, borrowed from the Greek boutyron. This may have been a construction meaning "cow-cheese" (bous "ox, cow" + tyros "cheese"), or the word may have been borrowed from another language, possibly Scythian. The root word persists in the name butyric acid, a compound found in rancid butter and dairy products.