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Beans in the south usually refer to cowpeas (long beans)

That is what Shandong friends call

"Bean hook (jué)"

Image source network

Vigna is a widely grown plant of the genus Vigna in the Leguminosae family.

It can also be considered as

A general term for leguminous vegetables with edible pods

Rather than referring to a specific category

(For the sake of distinction, the term "beans" used below is a general term)

Cowpea has strong vitality

Available as early as the end of June

The late ones can last until early September

The First Affiliated Hospital of Zhejiang University School of Medicine

Liu Chenbing, a nutritionist at the Health Management Center, said

Cowpea is essentially a pod

soproteinRelatively high content

Around 3%

VegetablesLowFatLow in caloriesFeatures

Rich inDietary fiber

HelpfulDigestive systemHealth

There are also goodVitaminsC, carotene, etc.

Calcium, potassium, magnesium, etc.MineralsThe content is also relatively rich

Adequate supply of potassium and magnesium

ableReduce calcium loss

To a certain extentPrevention and Controlhypertension

Li Shizhen praised it in Compendium of Materia Medica.

"This bean can be used as a vegetable, a fruit, or a grain.

It is best to keep it as a backup, and it is the best quality bean."

This shows its high value

It also has obvious disadvantages

That is

High yields from crop to crop

Often people can't finish eating

Image source: Thai food blogger Ira

Cowpea is a leguminousThe only species that can be eaten raw

But the premise is that you can correctly identify it

After all, your "beans"

My beans seem to be different

(Please find the real cowpea in the picture below)

A wide variety of beans

The more common ones are green beans, snake beans,

Snow peas, snap beans, kidney beans, green beans, etc.

Most raw beans contain

Toxins such as saponins and hemagglutinins

Sapogenin

Can strongly irritate the gastrointestinal mucosa

Causes local congestion, swelling, and inflammation

Causes nausea,Vomit,stomach ache,diarrheasymptom

Hemagglutinin can

Coagulopathy caused by clotting of red blood cells

After eating, it will also interact with the surface of the small intestine.

Specific parts are combined

Impact on small intestinal function

Causes poisoning symptoms

So for most beans

Eat raw and half-cooked food

Will cause poisoning

If you're not entirely sure what beans you're eating

For safety

Or cook them all before eating

I can't finish eating the cowpeas

It can also be made into sour beans, dried beans, etc.

If you just want the taste

Can be eaten in moderation

But if you are pursuing nutritional value

It's better to eat fresh

After pickling the beans

Not only will it destroy a large number of vitamins

It will also greatly increase the nitrite content

Incomplete drying

It is also easy to breed various molds

Instead, the loss outweighs the gain