With the arrival of awn seeds, the weather is getting hotter and hotter. Although eating cold drinks is a pleasant thing, eating is becoming more and more inconvenient - on the one hand, it is too hot to cook, on the other hand, it is more and more difficult to bring food.

      In order to save money and eat more smoothly, many friends like to take "bento" (a Japanese word introduced through Taiwan), that is, boxed lunch, to work for lunch. However, when the weather is hot, food tends to rot. There is no refrigeration condition on the road, and the unit may not have a refrigerator. Many other friends worry that the temperature is high, bacteria grow fast, and vegetables

Question: You can see the salt added with iodine and selenium in the supermarket, which is said to be good for children. Which one should you choose?

A: Since 1996, the national legislation stipulates that iodine must be added to salt. Therefore, even the salt added with other nutrients is iodized salt. At present, there are salts added with iron, zinc, selenium, high potassium and low sodium salts in the market, Zinc salt is suitable for most children, while iron salt is suitable for children with mild anemia or who do not eat meat 。 Whether selenium salt is applicable varies from region to region, If it is not a selenium deficient area, and there is enough food such as fish, meat, eggs and milk every day, it is not necessary to buy selenium salt 。 High potassium and low sodium salts are suitable for middle-aged and elderly people, hypertension patients and cardiovascular patients.

      Many people have heard the saying that out of season vegetables and fruits are harmful to health, and fruits with ripening agents will make children mature ahead of time. Many people also ask: Which vegetables are seasonal? Which fruits are out of season? Can we be healthier without them? Is it true that children will not develop ahead of time?      

      According to a traditional Chinese saying, "don't eat from time to time", that is to say, food has the air of heaven and earth, and its nature is closely related to the change of climate and environment. If it is not seasonal food, it will not have the characteristics of that season, and its health value will change accordingly. Therefore, the ancients advocated eating seasonal food. In our eastern neighbor Japan, there is a similar saying that people are keen on eating "primary food", that is, fresh food in the season

Q: I like to buy yogurt for my son It is said that drinking too much is not good. How should we control this amount?

A: Yogurt is a kind of nutritious food highly praised internationally. Its health care value is higher than that of milk. Children can drink 1-3 small cups (125g/cup) every day. Replacing part of milk with yogurt has no adverse effect on the supply of protein, calcium and B vitamins, and yogurt also has the advantages of promoting nutrition absorption and improving resistance. If there is anything bad, it is to drink more than 2 cups of yogurt after a full meal, which may cause weight gain.

Q: Excuse me, my daughter is 6 years old and will go to school soon. What extra nutrition should be given to her?

A: At this time, the baby's appetite and digestion gradually grow up, and she does not need to be given any "extra" nutrients. The important thing is to give her a healthy and balanced diet.

Children all want to be consistent with children of the same age, so children who go to school will be strongly influenced by their classmates. Bad eating habits of other families, and hobbies for some sweet drinks, snacks, biscuits, etc. with low nutritional value may "infect" your baby. Therefore, you must do a good job in prevention, clarify the value of food and the key points of choice, and let the baby proudly tell the children the knowledge that his mother gave him.

Many people ask, is the fruit that has used the ripening agent one of the reasons why many children grow up ahead of time?

The answer is: There is no evidence that there is any relationship between fruit ripening agents and children's precocity 。 Ethylene is a harmless gas, which will be naturally generated during the combustion of gas, and will also be naturally released when fruits such as apples are mature.

Indeed, the time of physical maturity of children is getting earlier and earlier, although their psychological maturity is getting later and later. The problem of physiological precocity can be analyzed from two aspects: food nutrition and environmental pollution.

first, The increase of animal food will promote sexual maturity 。 With the increase of protein and fat intake, the physiological maturity time of adolescents is constantly advanced. For example, in the United States today, more than a quarter of black girls At the age of 9, there were signs of puberty starting. A hundred years ago, there was no such thing. In China, young girls who consume more animal food

      One day, I worked in the school until 6:30. Seeing that the students were still doing experiments, I decided to buy something delicious from the canteen to comfort them. What ice sugar gourd, sauce donkey meat, tea eggs, fried mushrooms... It's packed in a big bag. When I walked out of the canteen, I suddenly saw a popcorn stand near the door. I was attracted by the aroma, so I went to buy a bag. I thought the students must like it.

      However, when I looked at the popcorn stand in the dusk light, I could not help but have a cold war.

      Do you eat fast or slow? Can you finish it in a few minutes? Which of the three meals is the fastest? Why do you eat so fast? When do you eat fast? When can I eat slowly ？

      These problems may not have been seriously considered by many people. But they are really important for health 。

      Yesterday, the reporter interviewed by phone, saying that the online survey found that half of the people ate breakfast less than five minutes, and even some people ate dinner so fast.

During the summer vacation, I once gave a class to exchange students at Tokyo Agricultural University in Japan to introduce China's diet and nutrition. A girl majoring in nutrition raised her hand and asked: Why don't you Chinese lack vitamin C? Don't you cook all the vegetables? Isn't vitamin C very afraid of heat? Don't vitamin C decompose completely after cooking?

      The girls' question is not surprising, because many Chinese people also have the same idea that vitamin C is very afraid of heat. Vitamin C will completely decompose after tomatoes are fried and eaten, and lemon slices cannot be soaked in hot water. Some people want to eat everything raw and drink all fruits and vegetables with juice, thinking that this is the best way to get vitamin C.

      How afraid is vitamin C of heat? I'm afraid the truth of this problem is not exactly the same as people expected.

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