You can eat bananas when you are hungry.
Bananas belong to the fruit containing high carbohydrates, 100g banana contains about 380J calories, eaten when hungry can quickly replenish energy for the body.
However, it is not recommended that patients with cardiovascular disease eat bananas on an empty stomach, bananas contain a large amount of magnesium, if you eat a lot of bananas on an empty stomach, it is likely that the magnesium content of the blood will rise suddenly, resulting in the proportion of magnesium and calcium in the blood of the human body is out of proportion, the cardiovascular system has an inhibitory effect.
At the same time, bananas have the function of laxative, promote gastrointestinal peristalsis, fasting stomach basically no digestible things, at this time to eat too much banana will accelerate gastrointestinal peristalsis, promote blood circulation, increase the heart load.