1. Why are red dates so red?
Jujube turns red because the peel of jujube contains Julia and anthocyanin. After sun exposure, the sugar in jujube increased, which promoted Julia and anthocyanin to be converted into lycopene, making jujube red. Chlorophyll has been learned in middle school. What the hell is lycopene? Mention another name and everyone will be familiar with it. He is the famous carotene. Because he was first found in carrots, he got such a stingy name, which limited his broad development space. Carotene is the raw material for synthesizing vitamin A, and has nothing to do with the synthesis of hemoglobin. Are you sighing for the beauty school? It is wrong to stick to the beauty cheats for so many years! Don't worry, look down.
Second, jujube is not just a name.
As we all know, the important raw material for synthesizing hemoglobin is iron. So what is the iron content in jujube? We took out the second edition of China Food Composition Table (edited by Yang Yuexin, Peking University Publishing House) from the sutra depository and turned to page 69. Fresh jujube contains iron per100g, and dried jujube contains iron per10.2g.. Let's compare some familiar fruits:
Apple 0.6 mg
Pear 0.5 mg
Peach 0.8 mg
Grape 0.4 mg
Strawberry 0.14mg
You see, jujube is more than just a name!
Yeah! Beauty pie pulled back a game!
But Bo Gu Dakang has always adhered to the spirit of understanding things and will never stop there.
Third, beauty pie is not a group of foodies.
Since the iron content in jujube is so rich, how much is appropriate to eat a day?
We took out the eighth edition of Internal Medicine published by People's Health, which is necessary for doctors and monks. Turn to page 704, iron reuse and excretion: normal people need 20-250 mg of iron to synthesize hemoglobin every day, most of which comes from iron released after the destruction of aging red blood cells, and only 1.0- 1.5 mg comes from iron absorbed by foreign sources. However, dried dates contain 2.3 mg of iron per kloc-0/00 g, so we only need about 50 g of dried dates every day.
Wrong, the human body has an absorption and utilization rate of nutrients in food, otherwise we will become brave. Let's turn back to page 703, the source and absorption of iron: iron supplement mainly comes from food. The normal diet contains iron10-15mg, of which 5%- 10% can be absorbed.
We use the normal upper limit, that is, the total iron required for food every day is 15 mg, to calculate how much iron is needed if we only eat dried dates.
The required mass of dried jujube =15mg (total iron content in food) ÷ (2.3mg/100g) (iron content per100g of dried jujube) = 652g.
Quality of fresh dates to be eaten = 15 mg (total iron content in food) ÷ (1.2mg 100 g) (iron content per100g dried dates) = 1250 g.
Converted into familiar market Jin, dried dates are three or two Jin, and fresh dates are two and a half Jin. This is to supplement the normal amount of iron needed every day. If it's a physiological period, you need more.
Oh, my God! In order to make up for the iron, maybe our beauty school should be renamed the gourmet gang. Let me eat a catty of dates first to calm my nerves.
Fourth, we need solutions.
Fortunately, we have a list of food ingredients in China. let me check.
Lean pork contains 2.99 mg of iron per 100 grams, and pig liver contains 18 1.3 mg!
Look again, and!
It turns out that the iron content of staple foods we eat, such as wheat, rice, corn and millet, is higher than that of jujube, and the favorite soy products, kelp and fungus of sisters are higher.
Hey! What a false alarm! I thought our beauty school lost blood every month, and there was no remedy.
Verb (abbreviation of verb) conclusion
In the case of iron deficiency, the iron absorption rate of human body will increase, maintain food diversity, eat more animal foods such as red meat, which is conducive to iron supplementation; But once diagnosed as iron deficiency anemia, don't expect to return to normal through food supplement and receive standardized treatment as soon as possible.
As for jujube, although it is beneficial to supplement iron, it cannot replace medicine or staple food. However, as our elegant beauty school, it is impossible to always hold a steamed bun in your hand every day. Eating a few dates after work can not only beautify the face, but also fall out of favor.
Authors: Hematology Hospital of China Academy of Medical Sciences.
Attending physician in Wang Hailong