Michelin has published its annual guide for 22: some traditional old Beijing snacks, such as bean sauce, tripe, and pot-stewed restaurants, are on Michelin's list of cheap food in Beijing. Therefore, if you don't eat braised pork and fried liver in Beijing, you will come for nothing.

a person can only meet his body's output needs by eating and taking in nutrients every day. There are thousands of kinds of human foods, but in the final analysis, they will be transformed into seven kinds of nutrients: carbohydrates, protein, lipids, vitamins, minerals, dietary fiber and water.

from infancy, health care doctors will say that it is time to supplement vitamin D. There are also many parents who are worried that if they keep eating, they will overeat and have a bad influence. For infants, yes. There are two kinds of vitamins needed by human body:

One is called fat-soluble vitamins, including vitamins A, D, E and K. These vitamins must be dissolved in oil to be absorbed.

One kind is called water-soluble vitamins, including vitamin B and vitamin C. Water-soluble vitamins can be dissolved in water and easily lost.

Because fat-soluble vitamins are insoluble in water, it is difficult to excrete from the kidneys, and it is easy to accumulate too much in the body to produce toxic effects. Therefore, we should pay attention to the dosage when supplementing fat-soluble vitamin preparations such as vitamins A, D and E, and don't overdo it. It is recommended to eat cod liver oil strictly according to the instructions when giving it to children.

what about adults? Is it necessary to promote multivitamins in the market? Do we adults really need vitamin supplements? The answer is yes. Xia Meng's evaluation of vitamin balance in "You are what you eat" is: it is extremely easy to lack, and it is difficult to measure.

The content of vitamins in human body is very small, less than 1%, but without vitamins, many important life activities in human body can't be completed, so they are called life-sustaining elements, or "vitamins" for short.

It is known that vitamin D has effects on cell growth in more than 3 organs. In other words, whether about 1% of gene expression is normal or not is related to whether vitamin D is enough. If one of dozens of vitamins is the most important, vitamin D should be the first.

and vitamin d is a kind of vitamin that is strongly dependent on the skin, which means that we need to get more sunshine. Adults need to stay outdoors in sunny places for 1 hour to 2.5 hours in winter to avoid vitamin D deficiency.

as we said at the beginning, we meet our body's output needs by eating and taking in nutrients. What is the daily dietary supplement of vitamin D?

Plants are excluded first, because vitamin D is fat-soluble and must be dissolved in oil to be absorbed, so there is almost no vitamin D in plants; Vitamin d in pigs, cattle and mutton is also very small, and the proportion is not as high as that of eggs; But to meet the daily needs of vitamin D, you need 1 to 25 eggs.

Vitamin D is usually temporarily stored in the liver, and it will be transferred out by the body when necessary, so the vitamin D content in the liver of most animals is quite high. Eating two ounces of pig liver and sheep liver is enough for one day.

However, for animals that live for a long time, their livers and kidneys are often places where harmful substances gather in large quantities. It seems that it is not worth the loss to eat a large amount of livers just to supplement vitamin D.. Like the waist and liver of a barbecue restaurant, you can eat as little as possible. If you have to eat, it is recommended to eat heart.

The most recommended intake of vitamin D is that the content of deep-sea fish, such as salmon and tuna, is 1 times that of eggs under the same quality. But for inland people in the north, buying deep-sea fish is not only troublesome, but also costly. Then take a direct vitamin D supplement, which is the most economical and efficient.