Banana is native to southeastern Asia. Bananas are one of the fruits that people love, and Europeans call it "happy fruit".

Why is the skin of banana yellow? Banana's epidermal cells contain chlorophyll and lutein. When the banana is not mature, chlorophylls cover the yellowin of lutein, so the banana looks green.

After the banana matures, it will slowly release a substance called "ethylene". It will have a chemical reaction with chlorophyll to destroy chlorophyll and disappear green. In this way, the yellowin of lutein is displayed, and the banana is yellow.

A Western study shows that a banana has about as many calories as half a bowl of rice. Therefore, bananas are a good source of calories. Athletes can easily vomit if they eat too much food before a competition. Bananas are the best food to replenish energy at this time. Some marathon runners eat nothing but bananas before running a marathon.

The benefits of eating bananas are manifested in the following aspects:

Bananas contain a variety of nutrients. Bananas are rich in carbohydrates, rich in nutrition, containing calcium, phosphorus and iron and other minerals. Because bananas can promote digestion and absorption and can supplement nutrition, eating bananas can also reduce the infringement of bacteria and reduce virus invasion.

Bananas are rich in potassium, and potassium has a inhibitory effect on sodium in the human body. If we eat more bananas, it can reduce blood pressure and prevent hypertension and cardiovascular disease. Studies have shown that eating two bananas a day can effectively reduce blood pressure by 10%.

Eating bananas can prevent constipation. Banana is rich in dietary fiber. Therefore, it can stimulate intestinal peristalsis, can promote the excretion of feces, thereby reducing the time for harmful ingredients to contact with intestinal mucosa. The benefits of bananas in preventing constipation are very obvious.

Bananas are a very common fruit in our lives. Eating some bananas often is good for our bodies. But there are some taboos when eating bananas. Let's take a look at what it is!

1. Do not eat immature bananas

When we eat bananas, we must pay attention to this matter. Because eating immature bananas can cause constipation. The raw banana contains a large amount of tannic acid, and tannic acid has a very strong convergence effect, causing constipation.

Especially after the elderly or children have eaten raw bananas, they not only cannot help to defecate, but may occur in constipation.

2. Do not eat bananas too much

Cooked banana is fragrant and sweet, very delicious. But we must not take too much intake when eating bananas. Because bananas contain more elements such as magnesium potassium.

If these mineral elements take too much in a short time, they will cause sharp increase in magnesium potassium in the blood, which will cause harm to our health. In addition, if you eat bananas too much, gastric acid secretion will be greatly reduced, causing gastrointestinal discomfort.