1. Why is jujube so red?
Jujube turns red because the skin of jujube contains Julia and anthocyanin. After sun exposure, the sugar in jujube increases, which promotes the transformation of Julia and anthocyanin into lycopene, which makes jujube red. Chlorophyll has been learned in middle school. What the hell is lycopene? When you mention another name, everyone will be familiar with it. He is the famous carotene. Because he first found it in carrots, he got such a stingy name, which limited his broad space for development. 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 insist on 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? Let's take out the second edition of China Food Composition Table (edited by Yang Yuexin, Peking University Publishing House) from the Tibetan Scripture Pavilion, and turn to page 69. Fresh dates contain iron 1.2 mg per 100 grams, and dried dates contain iron 2.3 mg per 100 grams. 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 not just a name!
Yeah! Beauty faction pulled back a game!
However, 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 take out the eighth edition of Internal Medicine Textbook published by People's Health for Medical Monks, and turn to page 704, Reuse and excretion of iron: normal people need 20-250 mg of iron to synthesize hemoglobin every day, most of which comes from the iron released after the destruction of aging red blood cells, and only 1.0- 1.5 mg comes from the iron absorbed externally. However, dried dates contain 2.3 mg of iron per 100 grams, so we only need about 50 grams 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, and the normal diet contains iron10-15mg, of which 5%- 10% can be absorbed.
We use the normal upper limit, that is, the daily total iron requirement 15 mg, to calculate how much iron we need to eat if we only eat dried dates to supplement iron.
The required mass of dried dates =15mg (total iron content in food) ÷ (2.3mg/100g) (i.e. iron content per 100mg of dried dates) = 652g.
The mass of fresh dates to be eaten =15mg (total iron content in food) ÷ (1.2mg/100g) (i.e. iron content per 100g of dried dates) =1250g.
Converted into a familiar market catty, dried dates are three taels a catty and fresh dates are two and a half catties. This is to supplement the normal amount of iron needed every day. If it is physiological period, it needs more.
Oh, my God! In order to make up for the iron, maybe our beauty school should be renamed the food gang. Let me eat a catty of jujube first to calm my nerves.
Fourth, we need solutions.
Fortunately, we have the China Food Composition List. Let me look it up.
Lean pork contains 2.99 mg of iron per 100 grams, and pork liver 18 1.3 mg!
Look again, and!
It turns out that the iron content of the staple foods we eat, such as wheat, rice, corn and millet, is higher than that of jujube, and the soy products, kelp and fungus that our sisters love best are higher.
Hey! A false alarm, I thought that our beauty school lost blood every month and could not be remedied.
V. Conclusion
Under the condition of iron deficiency, the iron absorption rate of human body will increase, and maintaining food diversity and eating more animal foods such as red meat are 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, nor can it replace staple food. However, as our elegant beauty school, we can't always hold a steamed bun in our hand every day. Eating a few jujubes after work can not only help beauty, but also lose grace.
Authors: Hematology Hospital of China Academy of Medical Sciences.
Attending physician in Wang Hailong