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10 Side-Effects of Eating Too Many Bananas

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All over the globe, this soft, delicious, and creamy fruit is known for its delightful taste and exceptional health benefits. Bananas are one amongst the world’s most popularly devoured fruits and are packed full of essential nutrients that help ward off several physiological and psychological problems. While most of us might go bananas over bananas, have you ever thought about the potential risks they could have?

Side-Effects of Bananas

1. Constipation

Shocked? Yes, we were shocked too on acquiring that bananas cause constipation! All along, we have known that bananas support bowel movements, but the magic lies in how ripe the bananas are. Unripe or green bananas are abundant in resistant starches, which can raise the risk of constipation. They also contain large doses of tannic acid that have an inhibitory effect on the digestive tract. Tannic acid prevents the secretion of the gastrointestinal fluid and curbs gastrointestinal motility. A ripe banana, on the other hand, can help relieve constipation. Bananas have been proclaimed as constipation-causing foods.

2. Weight Gain

Comply that bananas, in contrast to your favorite box of cookies or crisps, have lesser calories, but, they still have sufficient calories to make you gain weight. That is if you don’t keep a check on your portion sizes.

A medium-sized banana contains 105 calories. That, in contrast to a medium-sized orange, a bowl of diced watermelon, or a cup of grapes is a lot higher. So, if you’re eyeing for a low-calorie snack to satisfy in every few hours, bananas may not be the most suitable choice. Alternatively, fruits and veggies with high water content like watermelon, cantaloupe, peaches, cabbage, strawberries, lettuce, zucchini, cucumber, etc. make for healthier snack options. They have fewer calories and high fiber content to keep you satiated for long.

3. Risk of Type 2 Diabetes

Bananas meet the ‘medium-level’ glycemic food class, which means that they have the capability to cause a small increase in your blood sugar levels. Considering the overconsumption of foods with a high glycemic index can raise your risk of developing type 2 diabetes, cardiovascular diseases, and obesity, you should adjust your intake of bananas. This is all the more valid in the case of overripe bananas as they have a higher glycemic index as opposed to regular bananas.

4. Migraine

If you’re often bothered by intense migraine attacks, you may need to avoid including bananas in your everyday diet. Tyramine, a substance found in many foods like cheese, fish, meats, and bananas is a trigger for migraine headaches, the University of Maryland Medical Centre reports. Since banana peels carry ten times more tyramine than banana pulp, be extra careful about removing the stringy pieces of peel from the fruit before eating it.

5. Nerve Damage

As bananas comprise vitamin B6 in large amounts, their overconsumption can end in nerve damage. According to the University of Maryland Medical Center, consumption of more than 100 mg of vitamin B6 without prescript can result in nerve damage. However, the chance of nerve damage through banana consumption seems limited unless you are a bodybuilder with a banana passion or if you are engaging in a banana eating competition.

6. Drowsiness

Always thought that starting your day with a banana was a grand idea? What you apparently didn’t know was that bananas can make you feel dozing, even if you’ve just started the day. They are abundant in tryptophan, an amino acid that can decrease your mental performance and reaction time, apart from making you feel sleepy. Bananas also contain high doses of magnesium, a mineral that supports muscle relaxation. These characteristics, however, make them a great snack before bedtime.

7. Gas

Eating bananas can result in gas. They contain soluble fiber and fructose, both of which can lead to gas. If you abruptly increase your intake of fiber or consume it in large amounts, it takes a lot of force for your large intestine to break down the fiber, and it can, therefore, cause gas. Likewise, in the case of fructose, when consumed in large amounts, your body can find it challenging to digest it.

8. Hyperkalemia

Hyperkalemia is an ailment caused due to excess potassium in the blood and is recognized through indications like vomiting, uneven pulse rate, and an irregular heartbeat that can even lead to a heart attack. As per the Linus Pauling Institute of Oregon State University, a dosage of potassium higher than 18 g can induce hyperkalemia in adults. There are several diet plans like the GM diet that recommend excess intake of bananas on specific days. If you follow such diets, you could just be calling for trouble.

9. Abdominal Pain

If you indulge in bananas that are not ripe adequately, you may end up with critical abdomen pain. You may also encounter nausea along with abdominal pain. Unripe bananas contain a large amount of resistant starch that takes a long time for your body to assimilate You may also encounter vomiting or diarrhea.

10. Tooth Decay

Being high in starch, bananas can cause severe tooth decay if you don’t sustain proper dental hygiene. According to certain studies, bananas can be even more harmful to your oral health as opposed to chocolates, red licorice, and chewing gum. Starches dissolve gradually in the mouth whereas sugars diffuse quickly. Therefore, when you eat foods like bananas, their bits rest between the teeth for about two hours and thus draw more bacteria, resulting in more cavities.


Bananas are not just tasty, but highly nutritious too but over-consuming this super fruit can actually reverse all its benefits.

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