The biggest misconception about bananas is probably their supposed ability to relieve constipation.
After all, they have a smooth texture and a sleek appearance. Based on the principle of "like cures like," many believe they can "promote bowel movements and lubricate the intestines."
But in reality—bananas have only average fiber content.
A key factor in improving constipation is dietary fiber intake, and bananas fall short in this regard.
In comparison, fruits like dragon fruit, apples, oranges, and pears contain significantly more fiber than bananas. Vegetables, meanwhile, offer even higher fiber content and lower calories, making them the optimal daily choice.

Bananas may even cause constipation.
Unripe bananas, or green-skinned ones, contain high levels of tannic acid. Tannic acid has a constricting effect on the intestines, potentially worsening constipation. However, ripe bananas have significantly reduced tannic acid content.
Beyond laxative claims, bananas carry many other myths.
For instance, claims that bananas aid weight loss; that they lower blood pressure; or that they shouldn't be eaten on an empty stomach...
Can bananas help you lose weight?
The common belief is that bananas are low in calories and filling, thus aiding weight loss.
Unfortunately, this overlooks the sugar content in bananas... Excessive sugar can still lead to weight gain.
Moreover, relying solely on bananas cannot meet the body's nutritional needs. A balanced diet remains essential.
Can bananas lower blood pressure?
Bananas are indeed rich in potassium, and adequate daily potassium intake can help prevent hypertension.
However, preventing hypertension requires consuming 3600 milligrams of potassium daily—equivalent to eating 11 bananas a day...(Go, Banana Man!) So relying solely on bananas to lower blood pressure isn't very reliable.
However, after sweating during exercise, the body loses a significant amount of potassium, making a banana a good choice at that time.
Can't eat bananas on an empty stomach?
Of course you can eat bananas on an empty stomach. Their soft texture makes them easy to digest, and they're even recommended during recovery from diarrhea.
There are countless versions of the "don't eat on an empty stomach" myth—you can't eat this on an empty stomach, you can't eat that on an empty stomach. I suspect what they really mean is: don't eat anything on an empty stomach.
One final note: Avoid storing bananas in the refrigerator, as they can get "frostbitten."
After all, they're tropical fruits. Placing them in a cold environment like a fridge is like putting someone from the south in a northeastern winter without heating—it's pretty miserable for them.