A mouthful of fried rice at a sky-high price, Old Tang apprenticed on the spot

Chapter 758 Vitamin A
Seeing that they were willing to listen to him, Li Yi picked up the washed dog liver, let the camera take a close-up, and then asked: "Eat more liver to improve eyesight, have you heard this saying?"

"I heard."

Huang Xiaoming on the side answered for the audience: "When I was a child, my mother often fried pork liver for me, saying it would supplement iron and improve eyesight, but she fried it too much and I didn't like eating it."

In the live broadcast room, the audience also responded with barrages.

"I quite like eating liver, but it needs to be fried a little tender."

"The chef at the Big Fat Restaurant in front of my neighborhood is very good at stir-frying fried liver tips. It's so tender. I have to eat it every now and then to satisfy my cravings."

"After tigers and lions hunt animals, they first dig out the liver and eat it. Carnivores are the best at eating meat."

"My family has a very popular Qiaotou Sannen. It contains liver slices and is stir-fried until they are just raw. It is smooth and tender. It is very enjoyable to eat, but people with bad gastrointestinal problems may eat it when they go home at night."

"When you wake up in the old capital in the morning, it's steamed buns with fried liver. It's so delicious!"

"When Reba and the others came last time, Brother Yi made fried liver. I went to a barbecue restaurant near my house to eat it once and asked him to grill it tenderly. It was really delicious."

"When I was a child, I had a keen sense of taste and felt that the liver was a bit bitter, but as I grew up, I loved eating it. I don't know why."

"I have been forced to eat liver by my parents since I was a child. Now the vision in both eyes is 5.0. I don't know if it has anything to do with eating pork liver."

Looking at the barrage floating by, Li Yi smiled and said: "Eating liver improves eyesight. It's true. In the Tang Dynasty more than 1000 years ago, Sun Simiao had already recorded the use of animal liver to treat night blindness in "A Thousand Gold Prescriptions".

The natives of Brazil also spread the idea of ​​using cod liver oil to treat dry eye disease.

This is because the livers of animals contain a lot of vitamin A.

Vitamin A, also called retinol, has the functions of promoting growth and reproduction, maintaining bones, epithelial tissue, vision, and normal secretion of mucosal epithelium, etc.

If there is a lack of vitamin A, growth will be slowed, vision will decrease, dark adaptation ability will decrease, and night blindness will form.

If it is deficient for a long time, dryness of the eye epithelial cells, hyperkeratosis, and reduced lacrimal gland secretion may even occur, leading to dry eye disease, followed by corneal softening, perforation, and in the most serious cases, blindness.

Therefore, in our daily diet, we must consume more foods with relatively high vitamin A content to supplement vitamin A.

The food with the highest vitamin A content is animal liver. "

After hearing Li Yi's explanation, the audience in the live broadcast room suddenly realized.

"So it's true? I thought it was a lie made up by adults who didn't like liver when we were young!"

"When I was in high school, my mother bought me cod liver oil. I thought it was an IQ tax, but it turns out it really works?"

Seeing these barrages, Li Yi smiled and said: "IQ tax is not an IQ tax, but the content of vitamin A in the liver of fish is not more than that of the poultry and livestock we usually eat.

Take foie gras for example!The vitamin A content in foie gras is relatively high, containing about 100 mg per 60 grams.

The content of sheep liver, beef liver, pork liver, and chicken liver is also between 100 mg and 30 mg per 50 grams.

Pork liver is the highest, with about 56 mg, and beef liver and sheep liver are also low.

The liver of fish also contains a relatively large amount of vitamin A, but it is basically only about 100 mg per 20 grams.

For example, shark liver contains 100 mg of vitamin A per 21 grams.

If the manufacturer concentrates the vitamin A in it, the content will still be considerable. "

After hearing Li Yi's explanation, the barrage in the live broadcast room immediately became excited.

"Damn! After doing this for a long time, the content of pork liver is still not high!"

"Isn't this an IQ tax? Brother Yi, why don't you save face for them!"

"Then I might as well eat pork liver! How much does a pound of pork liver cost? How much does cod liver oil cost?"

"Haha! If the packaging is not more expensive, why is it sold at such a high price?"

"What about shark liver oil and sturgeon liver oil? They're all just to sound classy."

"As practitioners passed by, in fact, many manufacturers of cod liver oil used chemical synthetic materials, which were not shark liver at all. They were hidden."

"This is a barrage, why don't you hide your hammer?" There was a lot of discussion in the barrage, but it was still mixed with doubts from dog lovers.

"Since pig liver has the highest content, isn't it okay to eat pig liver? Why should we eat dog liver?"

Looking at the questioning barrage, Li Yi smiled and said: "This question is on point. In terms of vitamin A content, dog liver is an exception.

The vitamin A content in dog liver is completely different from the livers I mentioned above.

The highest vitamin A content in pig liver is over 50, but do you know what the content in dog liver is?
The average is more than 60000!Up to 70000!

And it’s per gram!per gram!

To make 3 units of vitamin A tablets, only half a gram of dog liver is enough. It doesn’t even need to be processed. It can be dried and compressed into tablets or pills.

A bottle of 100 capsules of dog liver tablets only requires 50 grams of dog liver.

After large-scale breeding, the cost is only one yuan.

Even if various sales and packaging expenses are added, the cost will not exceed one and a half yuan.

If you sell a bottle for 3 yuan, the manufacturer will make a lot of money.

However, the same chemically synthesized medicine costs 7 yuan, which is more than doubled.

Moreover, if the chemically synthesized vitamin A acetate exceeds 1 units, it will have the side effect of myalgia.

The vitamin A in animal livers can be stored directly in the liver after eating.

If it's dog liver, you won't have any side effects if you take 3 units. "

After hearing Li Yi's explanation, there was an uproar in the live broadcast room.

"Huh? Is there such a thing?"

"Is the dog's liver so strong?"

"Damn it! That's it! No wonder some dog lovers are so desperate to ban the eating of dogs! There must be sponsors from manufacturers selling cod liver oil!"

“It’s all doctrine in words, but behind the scenes it’s all business!”

Looking at the barrage floating by, Huang Xiaoming was thoughtful, and then asked: "I heard that dog liver cannot be eaten? It seems that eating too much will cause poisoning."

"Yes, vitamin A poisoning."

Li Yi nodded and explained: "Excessive intake of vitamin A can also cause acute poisoning.

If an adult ingests 50 units at one time, poisoning will occur.

That's why there is a saying that dog liver is poisonous and should not be eaten, because it is easy to overdose.

However, chemically synthesized vitamin A acetate can also be toxic. After it enters the human body, it needs to be synthesized with palmitic acid before it can be metabolized.

Palmitic acid is a saturated fat and is rarely consumed by the human body.

If palmitic acid cannot be found in the body, vitamin A acetate will accumulate in the body and it is easy to be overdosed.

Therefore, comparing the two, dog liver is safer. As long as the intake is not excessive, there will be no side effects. "

"sharp."

Huang Xiaoming nodded in understanding.

At this time, Hao Libao, who had been listening by the side, also started to praise: "I know that dog liver is a traditional Chinese medicine, but I didn't expect that there are so many ways here, and I have learned a lot."

Behind him, the busy disciples raised their heads from time to time and looked at Li Yi with surprise in their eyes.

Isn't this guy a chef?How did you start teaching chemistry?
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　　My relatives at home are coming over and I have to go and keep them company. I will finish another chapter when I come back.

　　
　
(End of this chapter)