It is said that bananas are rich in potassium and magnesium, eating bananas on an empty stomach will make potassium and magnesium enter the blood quickly, disrupt the balance of calcium and magnesium, potassium and sodium, cardiovascular inhibition, which is not conducive to health. Each 100 grams of banana contains potassium 256 mg, magnesium 43mg, the content is indeed rich, but the potassium and magnesium in food, absorption is very limited (for example, the absorption rate of magnesium is only 1/3), and is slowly absorbed into the blood. In the absorption, the body will always monitor the amount of potassium and magnesium, and through the kidneys, skin, metabolize the excess part out. Therefore, people with healthy kidneys have no upper limit of potassium and magnesium intake, and will not easily overdose, so don’t be afraid to eat bananas on an empty stomach. Although banana is delicious, but it does not relieve constipation. Because the fiber content of bananas is not high, it cannot effectively stimulate intestinal peristalsis and achieve the effect of laxative. If you eat a less ripe banana, it may be more likely to cause constipation because it contains more tannic acid. Banana sweet cake Ingredients: 1 banana; 1 egg; 80g of milk; 60g of flour; a little oil. Steps: 1: Peel and cut the banana, add milk, put the beater into a paste; 2: Add an egg, sieve in flour, mix gently; 3: Brush a little oil on the bottom of the pan, pour in the right amount of batter; 4: Fry lightly on low heat, see bubbles and flip; 5: Fry until both sides are browned, toothpick sticks do not hang batter is cooked. Tips: The riper the banana, the better (sweet); want to be more fluffy, you can add a little baking powder. Banana nutrition: 100g of banana pulp contains 93 calories, which is at a high level in fruits, can quickly replenish energy, and a good sense of satiety.