The mass of a banana is about 150 grams, so the amount of protein contained in it is about 2.1 grams, and there is nutritional value in moderate consumption.
Every 100 grams of bananas contain 93 calories, of which 22.0 grams of carbohydrates, 1.4 grams of protein, 0.2 grams of fat, 1.2 grams of dietary fiber, 256 milligrams of potassium, vitamin C8 milligrams. So 150 grams of a banana has about 2.1 grams of protein.
The main nutrients in bananas are carbohydrates and also contain some potassium, which in moderation can provide the body with energy and the above nutrients.
The protein content in bananas is not high and is incomplete protein, lacking essential amino acids, so it is not a good source of protein.