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: "Eating more liver can improve eyesight, have you heard this saying?"
ded.
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 liver, but it needs to be stir-fried a little tender.”
“The chef at the Big Fat Restaurant at the entrance to my neighborhood is very good at the fried liver tip, which is very tender. I have to eat it every three to five to satisfy my craving.”
“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 tastes very enjoyable, but people with bad gastrointestinal problems may eat it when they go home at night.”
“When I wake up in the old capital in the morning, it’s steamed buns with fried liver, it’s so delicious!”
“Last time when Reba and the others came here, 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 my vision in both eyes is 5.0. I don’t know if it has anything to do with eating pig liver.”
Looking at the barrage floating by, Li Yi said with a smile: "Eating liver can improve eyesight. This is true. In the Tang Dynasty more than a thousand years ago, Sun Simiao had already recorded the method of using 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 large amount 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 vitamin A is lacking, growth will be slowed, vision will decrease, dark adaptation ability will decrease, and night blindness will develop.
If it is lacking for a long time, it may even cause dryness of the eye epithelial cells, hyperkeratosis, reduced lacrimal gland secretion, and dry eye disease, followed by corneal softening, perforation, and in the most serious cases, blindness.
So in our daily diet, we need to eat more foods with relatively high vitamin A content to supplement vitamin A.
The food with the highest vitamin A content is animal liver. "
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: "It's not an IQ tax, but the vitamin A content in the liver of fish is no more than that of the poultry and livestock we usually eat.
Take foie gras as an example! The vitamin A content in foie gras is relatively high, containing about 60 mg per 100 grams.
The content of sheep liver, beef liver, pig liver, and chicken liver is also between 30 mg and 50 mg per 100 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 20 mg per 100 grams.
For example, shark liver contains 21 mg of vitamin A per 100 grams.
If the manufacturer concentrates the vitamin A in it, the content will still be considerable. "
Hearing Li Yi’s explanation, the barrage in the live broadcast room immediately became excited.
“Damn! After doing it 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?”
“Shark liver oil and sturgeon liver oil are just for the sake of sounding classy.”
“This is a barrage, why don’t you hide a 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 not at the same level as the livers I mentioned above.
The highest vitamin A content in pig liver is more than 50, but do you know what the content in dog liver is?
The average is more than 60,000! Up to 70,000!
And it’s per gram! per gram!
To make 30,000 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 dog liver tablets with 100 tablets only requires 50 grams of dog liver.
After large-scale breeding, the cost will only be one yuan.
Even if various sales and packaging expenses are added, the cost will not exceed 1.5 yuan.
Selling a bottle for 3 yuan makes the manufacturer huge profits.
However, the same chemically synthesized medicine costs 7 yuan, which is more than doubled.
Furthermore, chemically synthesized vitamin A acetate will have the side effect of myalgia after exceeding 10,000 units.
The vitamin A in animal livers can be directly stored in the liver after eating.
If it’s dog liver, you won’t have any side effects if you take 30,000 units. "
Hearing Li Yi's explanation, the live broadcast room was in an uproar.
“Huh? Is there such a thing?”
“Is the dog’s liver so strong?”
“Damn it! So 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 it’s all business behind the scenes!”
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.
Adults will be poisoned if they ingest 500,000 units at one time.
The reason why there is a saying that dog liver is poisonous and cannot be eaten is 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.
Since palmitic acid cannot be found in the body, vitamin A acetate will accumulate in the body and it is easy to be overdosed.
So, 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 as if he understood.
At this time, Hao Libao, who had been listening nearby, 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 gained a lot of experience."
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?
1
My relatives at home are coming over, so I have to go and keep them company. I will finish another chapter when I come back.
(End of this chapter)