It is better to boil milk over a high fire, but not over a slow fire.

It is better to boil milk over a high fire. It takes a longer time to boil milk over a slow fire. The vitamins and other nutrients in the milk are It is easily oxidized and destroyed by air, thereby reducing the nutritional value of milk.

But it should be noted that milk should not be boiled at high temperature for a long time. Some people boil milk at high temperature for a long time in order to thoroughly sterilize it. This is wrong. Milk is rich in protein. When heated, the colloidal protein particles in the milk will undergo great changes. When milk is heated to 60-62°C, dehydration will occur, and the protein particles in it will change from a sol state to a gel state, and then precipitation will occur; when the temperature reaches 100°C, the lactose in the milk will begin to coke. , causing the milk to turn brown, and gradually decompose to produce lactic acid, and at the same time produce a small amount of formic acid, making the milk sour. In this way, not only the color, aroma and taste of milk become worse, but the nutritional value is also greatly reduced. In addition, milk also contains some extremely unstable phosphate components. At high temperatures, this acidic phosphate will be converted into insoluble neutral! The phosphate precipitates, affecting the quality of the milk.

Soy milk and milk cannot be cooked together

Soy milk and milk are both foods with high nutritional value. Some people believe that mixing soy milk and milk, cooking it and drinking it can achieve the complementary effect of the two, improve the nutritional value, and absorb the nutrients of soy milk and milk at the same time. This idea is actually wrong.

This is because although soy milk and milk both need to be heated and boiled for drinking, their compositions are different, and the cooking requirements are also different. Soy milk contains trypsin inhibitors, which can stimulate the gastrointestinal tract and inhibit trypsin activity. This ingredient needs to be destroyed in an environment heated to 100°C for several minutes. Otherwise, soy milk that has not been completely boiled may easily cause poisoning after eating. Milk only needs to be boiled at a low temperature. If it is boiled at a sustained high temperature, the protein and vitamins in the milk will be destroyed, thus reducing the nutritional value of the milk. Since milk and nutrients require different temperatures to reach an edible level, the former requires a longer time to fully boil, while the latter should not be overcooked. Therefore, it is not advisable to cook soy milk and milk together, otherwise it will reduce the nutritional value and cause harm to the human body.

It is not advisable to use milk to cook poached eggs

Using milk to cook poached eggs is indeed labor-saving in operation, but it is unscientific from a nutritional perspective. This is because the boiling point of milk is relatively low, and it often does not take long to heat before it boils. At this time, the eggs are still in the half-cooked stage, and the bacteria in them have not been completely killed. And if you want to cook the eggs completely, part of the protein in the milk will be lost due to long-term heating, and the milk will easily overflow the pot.

It is not advisable to add sugar when boiling milk

If you add sugar when boiling milk, the lysine and fructose in milk will produce a toxic substance - fructose lysine under the action of high temperature. Not only can this substance not be digested and absorbed by the human body, but it can also cause harm to human health. People who drink this milk will experience gastrointestinal discomfort, vomiting, diarrhea and other symptoms. Children often drink milk boiled with sugar, which is very detrimental to intellectual development.

Heat over water, boil the milk over high heat, turn off the heat after boiling, wait for about 10 seconds, then turn on the heat and cook again. Repeat this process three or four times, which can not only maintain the nutrients of the milk, but also effectively Kills harmful bacteria in milk. If you must add sugar to the boiled milk, the correct method is to boil the milk separately first, and then add the sugar after it cools slightly. If you use a microwave to heat milk, be careful not to take too long, because if the temperature is high, the nutrients in the milk will be destroyed. Also note that heating in a microwave will cause uneven temperatures, so shake it before drinking to prevent it from being heated. Burned. In addition, many people often choose milk powder. The nutritional content of milk powder is similar to that of fresh milk. However, when brewing milk powder, pay attention to the temperature of the water not exceeding 60°C.