Can black spotted bananas be eaten?

Banana is delicious, rich in vitamins, trace elements, easy digestion and absorption, is one of people's favorite fruits.

Can black spotted bananas fight cancer?

There is a widespread claim on the Internet that “black spots have more bananas can fight cancer”. In fact, this statement first appeared in an article in 2006 “Takasaki Professor of Teikyo University in Tokyo”. However, apart from bananas containing the so-called "seventh nutrients", "Yamasaki Masaru" no longer any other research results appear on the Internet. The so-called "seventh nutrient" is actually a very general concept. Proteins, fats, carbohydrates, minerals, water, and vitamins are six essential nutrients for the body. Dietary fiber is collectively referred to as the "seventh nutrient."

At present, there are many researches on anti-cancer foods. It is also an important direction for the development of cancer-cancer active ingredients to be isolated from plants. However, “black-spotted bananas can fight cancer” has not been tested in clinical trials. Data support.

Can black spotted bananas be eaten?

Some consumers have indicated that spotted bananas can often be seen. Is it harmful to eat spotted bananas?

Xu Yongxin, a senior agronomist at the Beijing Agricultural Technology Promotion Station, explained that black spots began to appear on banana peels. This is a manifestation of bananas that are “done”. There are a few spots that “can be eaten and have nothing to do with safety”. And at this time, the banana has a high sweetness and a good taste.

However, Xu Yongxin reminded that if there are too many spots on the banana skin, the bananas have already matured and the spots will enter the flesh from the skin. Peel the banana peel, if the flesh inside also appears black, such a banana is seriously rot, can not eat again.

Black spots may be bananas suffering from anthrax

Bananas, like other plants, are also harmful. Such as yellow leaf disease, anthrax, black spot disease, flower thrips, fruit cracking disease, etc. Among them, anthrax causes the bananas to show black spot symptoms. Anthracnose is caused by cycads of bananas and belongs to a fungal disease. This disease only appears when the banana is ripe.

It is called anthrax because it is similar to human anthrax symptoms. During the Second World War, the anthrax biological weapons left a deep impression on people. Anthrax is a human infectious disease with a very high mortality rate. Will bananas suffering from anthrax be infected?

The answer is no. The anthrax that makes bananas blackened is not related to the anthrax virus. Anthrax only invades bananas and does not affect people.

Why did the bananas fade after a long time?

The sick bananas will turn black and normal bananas will darken after being placed for a long time. What is going on here?

It turned out that this is related to the presence of oxidized carbon in the epidermis of bananas. Normally, the cell membrane tightly wraps and protects the carbon oxides. Once the bananas are bumped or frozen at a low temperature, the cell membrane is broken. The internal oxidized carbon comes into contact with the oxygen in the air and becomes black after being oxidized. Small spots appear.

A simple experiment can confirm that: Take some of the bananas that are not spotted and put them in the refrigerator. After hours, there will be dark spots on the banana skin. Therefore, in the winter, vendors selling bananas will use plastic to wrap up the banana-bearing baskets. This is to prevent bananas from becoming black at a low temperature, affecting sales.

Several Tips for Keeping Bananas Fresh

1 Do not freeze in a refrigerator. The suitable temperature for storing bananas is about 13°C, and the temperature for storing fruits and vegetables in the refrigerator is about 4°C, which is not enough.

2 If you want to extend the banana's preservation time, you can wrap the banana roots with plastic wrap. The principle is very simple. The release of ethylene from bananas can accelerate the ripening of bananas. Most of the ethylene gas comes from the rhizomes of bananas. After wrapping, it slows down the ripening of bananas.

3 Apply lemon juice or vinegar to the cut banana rhizome to prevent it from turning brown.

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