1 Pay attention to eating bananas.
1, immature bananas are easy to cause constipation.
As we all know, when bananas are immature, their skins are turquoise, and when they are peeled off, they are too astringent to swallow. Ripe bananas, with astringency swept away, are soft, waxy and sweet, and are deeply loved by children and the elderly. Bananas are tropical and subtropical fruits. In order to facilitate storage and transportation, when picking bananas, you can't wait until they are ripe, but you have to pick them when their skins are green. The bananas we eat in the north are all ripened after ripening. The astringency of raw bananas comes from a large amount of tannic acid contained in bananas. When the banana is ripe, although the astringency can no longer be tasted, the tannic acid component still exists. Tannic acid has a very strong astringent effect, which can form dry and hard feces, thus causing constipation. The most typical thing is that after the elderly and children eat bananas, they can not help defecate, but can have obvious constipation.
2. Excessive eating of bananas can cause imbalance in the proportion of trace elements.
Banana is a delicious fruit, so some people eat a lot of bananas at a time. As everyone knows, this is very bad for your health. Banana contains more elements such as magnesium and potassium. Although these mineral elements are necessary for human health, if they are ingested too much at once in a short time, the content of magnesium and potassium in the blood will increase sharply, resulting in the imbalance of potassium, sodium, calcium, magnesium and other elements in the body, which is harmful to health. In addition, eating more bananas will also cause gastrointestinal dysfunction and excessive mood swings due to the greatly reduced gastric acid secretion. Therefore, bananas should not be eaten in excess.
3, bananas should not be stored in the refrigerator.
As we all know, bananas are picked when they are ripe in June or July, because they mature quickly. If they are picked when they are ripe, they taste bad and look stale. Then, after bananas are picked, the temperature requirements for storage are also high, generally 1 1- 13 degrees Celsius, while fruits and vegetables stored in the refrigerator are generally about 4 degrees Celsius, up to 8 degrees Celsius. Bananas, if placed in this environment, are easy to be frozen and damaged, and will turn black after being placed for one day, and become soft and rotten, and the taste will also deteriorate, and even patches or rot will appear.
4, avoid eating bananas on an empty stomach
We say bananas can be used as food, but we can't eat them in large quantities on an empty stomach. Because bananas contain a lot of potassium, phosphorus and magnesium, for normal people, a large intake of potassium and magnesium can make sodium and calcium in the body out of balance, which is not good for health. So don't eat too many bananas on an empty stomach.
5, bananas with taboos
Banana+yogurt: eating together is easy to produce carcinogens.
Banana+potato: eating together will cause facial spots.
Banana+taro: Eating together can cause bloating and poisoning.
Banana+sweet potato: avoid eating together.
2. The efficacy of bananas
1, prevention of cardiovascular diseases. When potassium is deficient in the body, arrhythmia, tachycardia and blood pressure drop will occur. A banana contains 400 mg of potassium, which can maintain the coordination of normal myocardial contraction, keep neuromuscular excitability normal, and coordinate myocardial contraction and diastolic function, thus maintaining the stability of blood pressure and preventing cardiovascular diseases.
2. Prevention and treatment of hypokalemia. After exercise, the body excretes a lot of sweat, and potassium is also discharged, resulting in limb fatigue; After a large number of vomiting and diarrhea or long-term use of diuretics, the blood potassium concentration will be reduced. At this time, eating bananas is the most ideal potassium supplement food, which can effectively prevent and treat hypokalemia.
3, anti-dementia. Eating bananas helps to improve brain power, learning ability, alertness and prevent Alzheimer's disease.
4. Prevention and treatment of depression. Banana contains a certain amount of 5- hydroxytryptamine and substances that synthesize 5- hydroxytryptamine, which can make people feel comfortable and help prevent and treat depression.
5, prevention and treatment of gastric and duodenal ulcers. Banana contains a chemical substance of 5- hydroxytryptamine, which can relieve the stimulation of gastric acid on gastric mucosa and promote the growth and reproduction of mucosal cells, thus repairing various ulcer lesions and preventing gastric ulcer.
6, anti-constipation. Bananas are rich in pectin in dietary fiber, which can promote intestinal peristalsis and make defecation smooth. Sticking to eating a banana before going to bed at night can effectively relieve habitual constipation. Traditional Chinese medicine believes that bananas are sweet in taste and cold in nature, while cold in nature can clear the heat in the intestines, and sweet in taste can moisten the intestines and relax the bowels, which is more suitable for the heat mystery caused by the accumulation of heat in the stomach and intestines. The symptoms are dry stool, short and red urine, red face and hot body, or abdominal distension and abdominal pain, dry mouth and bad breath. Bananas can be eaten 1~2 hours after meals, and it is advisable to eat 1~2 bananas a day.
7. Prevent gout. Eating bananas rich in potassium can help reduce the precipitation of uric acid crystals in joints and help the human body excrete uric acid.
8. Relieve eye discomfort. When the human body ingests too much salt, it will cause a lot of water to remain in the cells, causing red eyes. Potassium in bananas can help the human body to discharge these excess salts, balance potassium and sodium, and relieve eye discomfort. Bananas contain a lot of carotene, which can relieve eye fatigue to some extent and avoid premature aging of eyes.
9, eliminate itching. Banana peel contains banana peel which can inhibit the growth and reproduction of bacteria. Skin pruritus caused by sweaty feet, tinea of hands and feet can be applied to the affected area to eliminate itching.
10, improve immunity. Through animal experiments, it is found that bananas have a certain effect of inhibiting cancer cells and improving human immunity. Through animal tests, Teijing University in Japan compared the immune activities of bananas, grapes, apples, watermelons, pineapples, pears and persimmons, and found that bananas have the best effect, because bananas contain an anticancer substance called "trinitrofluorenone" (TNF), which can increase white blood cells and improve immune system function.