A whitish watery liquid kills over the yogurt - what is it and what is it due to?
The presence of this fluid is called a "whey secretion defect" in the food industry. It occurs when the structure of yogurt becomes unstable, often due to exposure to heat. The instability leads to shrinkage of the gel structure of the yogurt, which leads to the separation of the water content in a separate phase and pushing it to the surface as a lighter component.
Some manufacturers use food stabilizers to prevent this phase separation and achieve product homogeneity. But if the liquid is present, it is not a cause for concern, it is even a good sign - no unnecessary stabilizers are added. Most of the liquid is composed of water and whey, rich in proteins and minerals .
Whey , also called zwick , is a natural milk serum containing milk proteins (lactoalbumins, lactoglobulins), milk sugar (lactose composed of galactose and glucose) and some mineral salts. It does not contain casein , salt and has microscopic amounts of milk fat.
Zwick is one of the two main proteins in milk. During yogurt production, most of the available nail is removed. The small amounts left in the milk may not inspire confidence, but there is no reason to throw them away.
They are absolutely harmless and are an excellent source of protein for the body. In supplement to scientists from Lund University in Sweden discovered in 2005 that consumption of whey in limited quantities may be useful in the regulation of blood sugar and reduces the likelihood of sudden it jumps. It is advised to simply mix it with the condensed yoghurt under the whey and to consume it with pleasure.
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