Medical Jianghu of original DrX
Ms. Wu is 27 years old. Now she has been pregnant for 6 months, and she is raising a baby at home. On this day, she suddenly wanted to eat bananas, so she took them out of the refrigerator and was about to eat them. It happened that her mother-in-law saw them. Her mother-in-law hurriedly snatched them off and said earnestly, "It is said that bananas are the most radioactive fruit. You are pregnant now, so how can you eat such things casually!"
Ms. Wu is puzzled. How can a good banana become the most radioactive fruit? Can bananas still be eaten safely?
Eating 200 bananas is equivalent to taking a chest X-ray?
Bananas do have radiation, and radiation is mainly related to potassium. Among all fruits, banana is rich in potassium, especially potassium -40, which makes banana the most radioactive fruit.
Being radioactive does not mean that it will cause cancer. Many people will panic when they hear "radiation", which is totally unnecessary. Because any behavior that talks about toxicity regardless of dose is hooliganism, the additional ionizing radiation dose of a banana is about 0.078μSv, which means that eating 80,000 bananas in a row is equivalent to taking a chest X-ray. The so-called "eating 200 bananas is equivalent to taking a chest X-ray" is nonsense.
It is even more difficult to reach the fatal level, which means eating at least 25 million bananas at one time, which is impossible even if you think about it.
Bananas with black spots are poisonous and cannot be eaten?
There are rumors that bananas with dark spots are poisonous and can’t be eaten. People will be poisoned if they eat them.
In fact, there are two reasons why bananas have black spots. First, banana will have fungal diseases after being infected with Colletotrichum spinosum, which means that there will be black spots on the epidermis. Although it is a germ infection, it sounds terrible, but there is no need to worry too much, because this germ is isolated from human beings, even if it enters the human body, it will not affect health.
Another reason is that the skin of banana will be damaged by external force or low temperature, which will lead to oxidation reaction after exposure to oxygen, and finally black spots will appear on the skin.
These two conditions are normal, and some black spots are the manifestations of diseases. For example, banana anthracnose, scab, crown rot and banana rot will make bananas grow black spots.
However, it should be noted that these microbial diseases are only aimed at bananas, and even diseased bananas are still safe for human beings. As long as the pulp is good, you can eat it safely. If the pulp changes color with the epidermis, it is best not to eat it.
Bananas are not easy to grow black spots when stored like this.
① Eat and buy now.
Everything is the same. According to the principle of moderation, you can buy as much as you want to keep it fresh, especially bananas. It is best to eat them in two days.
(2) wrap the roots of bananas.
The basic substance that causes banana skin to turn black is ethylene. The more mature bananas are, the more ethylene will be released. Therefore, controlling the ethylene around bananas can delay the ripening speed of bananas. Most of the ethylene comes from the roots of bananas, so wrapping the roots of bananas can delay the ripening process of bananas, thus prolonging the preservation time.
③ Storage at room temperature
Studies have shown that the best storage temperature for bananas is around 13℃. Therefore, compared with storage in the refrigerator, room temperature is more suitable for banana storage, and bananas will ripen more slowly and are less likely to turn black.
(4) hang bananas.
You may also find that some supermarkets have special shelves for hanging bananas when you visit them. The reason why supermarkets choose to hang bananas is not because they look better, but because the hung bananas are better ventilated, which can make ethylene flow faster and delay the ripening of bananas.
Bananas are not only delicious, but also rich in nutrients. Besides basic energy-supplying nutrients, they are also rich in vitamin C, thiamine, riboflavin and nicotinic acid. However, it should be noted that bananas are not low in calories and belong to "high potassium fruits", so people with renal insufficiency, acute and chronic nephritis should not eat too much. In addition, the sugar index of cooked bananas is high, so diabetics should eat as little as possible.
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