Precautions for heating packaged milk:
1 Boxed pure milk can be heated, but only if the milk is poured out and heated. Otherwise, if the boxed or bagged milk is heated together with the packaging, the chemicals in the packaging box or bag will penetrate into the milk, thus causing unhealthy chemical toxicity. However, if the milk is poured out, it can be heated, because the pure milk is sterilized at an instant high temperature, but it can be heated to boil and turn off the flame.
2, it is good to heat the milk moderately, it is best not to add too much heat. The longer the milk is heated and the higher the temperature, the more serious the loss of nutrients, mainly vitamins, of which vitamin C is the most severely lost, followed by lactose. Drinking heated milk can make the stomach more active than cold milk, so that it can be absorbed to the end. If cooked for a long time, it will inevitably lead to the loss of nutrients in milk, so you can warm the box in hot water for a few minutes.
3. When milk is heated to 60 ~ 62℃, dehydration will occur, and protein particles in it will change from sol state to gel state, and then precipitation will occur; When the temperature reaches 100℃, the lactose in milk begins to coke, which turns the milk brown and gradually decomposes into lactic acid, and at the same time produces a small amount of formic acid, which makes the milk sour.
Extended data:
Precautions for milk heating:
1, water-proof heating
The best way to heat milk is to heat it from water, that is, pour the milk into a container such as a cup, and then put it in hot water to warm it. When it is warm, it is not necessary to heat the water, and the temperature can be adjusted according to personal taste. Although this method is troublesome, it can avoid the loss of nutrition when heating in microwave oven and boiling in pot.
2, strong fire heating
Milk is suitable for boiling with strong fire, and it takes a long time to cook milk with slow fire. Vitamins and other nutrients in milk are easily oxidized by air and destroyed, thus reducing the nutritional value of milk.
References:
People's Network-Can boxed pure milk be heated? How can milk be heated best?