Eat toon in addition to blanching water, do more step is safer

It's time to eat toon again.

When I was a child, there was a big toon tree in our yard, and my favorite thing to eat every spring was to use toon as a topping and pour it on the noodles.

However, toon is seasonal, "before the rain Tsubaki buds are tender as silk, after the rain Tsubaki buds are like wood" is said to eat before the rain in the Toon Valley (this year is April 20).

In order to let me eat the tender toon after the season, my mother would freeze the fresh toon for us to keep, thinking that it was sweet.

Do people love toon like me? This article talks about the nutrition of toon, precautions when eating, and the main points of storage.

First, the biggest nutritional advantage of toon is to supplement Vc

According to the 6th edition of the Chinese Food Composition Table, the biggest nutritional advantage of toon is that it is rich in Vc, with a content of up to 40 mg/100 g[1], which is higher than that of rapeseed, chicken feathers, mustard greens, purple cabbage, and cauliflower in vegetables, and also higher than oranges, oranges, and grapefruit in fruits.

Does the Vc content of toon trees vary from growing season to season?

A study tested the toon buds from Nanjing, Sichuan, Hunan, Hubei, Henan and Shaanxi on April 1, April 5, 9 and 13 respectively, and found that the content of toon Vc did not change much in different periods. [2]

Secondly, its calcium content is also OK, it is 96 mg / 100 grams [1], although affected by dietary fiber, the absorption rate can not be compared with milk, but it can also supplement some calcium, which is less than half of the recommended intake of calcium intake, it is still quite meaningful.

In addition, it is rich in antioxidant polyphenols and flavonoids[3], which can destroy free radicals in the body and reduce the oxidative damage caused by free radicals to the body.

Second, the most important thing to eat toon is to blanch water

Toon is a vegetable rich in nitrites.

Nitrite can bind to hemoglobin, affect oxygen transport, a temporary intake of too much will cause nitrite poisoning, dizziness, shortness of breath, chest tightness, weakness, palpitations, nausea, vomiting, lips purple and other symptoms, serious can cause heart rate slowdown, uneven heart rate, and even coma death.

Nitrites can also act in the body with intermediate metabolites of proteins, synthesizing the carcinogen nitrosamines, increasing the risk of stomach cancer and esophageal cancer.

How to eat toon to reduce nitrite?

Blanch the water.

Studies have shown that the nitrite content of the 5 cm long toon buds picked on the same day is as high as 34.1 mg/kg, but after boiling water blanching for 50 seconds, the water is drained and then measured nitrite, and the content is only 4.4 mg/kg. [4]

The World Health Organization and the Food and Agriculture Organization of the United Nations set a permissible daily intake of nitrites at 0.13 mg/kg body weight, which is 7.8 mg per day for adults of 60 kg.

For toons with a nitrite content of 4.4 mg/kg after boiling water, it is safe to control within 1773 grams.

For ordinary vegetables, nutritionists basically recommend eating 100-200 grams per meal, replaced by toon that is much more expensive than ordinary vegetables, and everyone lets go to eat two or three hundred grams of the sky, so after boiling water, rest assured to eat.

In addition, vitamin C can block the formation of nitrosamines, so when eating toon, you can also accompany some vegetables rich in Vc.

What are the vegetables rich in vitamin C? Broccoli, cauliflower, green pepper, chinese cabbage, mustard greens, peppercorns.

3. How to eat toon?

There are three ways to eat the most in my family, namely scrambled eggs with toon, tofu mixed with tofu, and toon poured noodles.

The method is very simple, after blanching the toon water, you can directly mix it with the tofu to eat; if you scramble the eggs, you will stir the toon and egg liquid after the boiling water is to stir the toon and egg liquid after the boiling water is to stir and fry; the toon topping is to cut the toon into cubes after boiling water, and then add some noodle soup water, salt, sesame oil, and then pour it on the noodles.

▲Pictured: Scrambled eggs with toon

▲Pictured: Tofu mixed with tofu

Today's discussion: How do you eat toon in your family?

bibliography:

Yang Yuexin. Chinese Food Ingredient List, 6th Edition, Volume 1[M].Peking University Medical Press, 2018

Yang Yuzhen, Peng Fangren, Cao Yida. Study on Changes in Nitrate, Nitrite and VC Content of Toon Buds of Different Sources[J]. Food Science, 2007, 28(6):4.

Wang Cheng, Zhang J F, Zhang J, et al. Antioxidant effects of toon at different growth stages and analysis of polyphenol oxidase isoenzymes[J]. Food Science, 2013(17):10-14.

Li Yuanting, Dou Junxia, Li Qing. Comparative Study on Nitrite Content in Toon Buds under Different Pretreatment Methods and Storage Temperature[J]. Modern Agricultural Science and Technology, 2019.