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Is Eating Too Many Bananas Bad for You?

by
author image Carly Schuna
Carly Schuna is a Wisconsin-based professional writer, editor and copy editor/proofreader. She has worked with hundreds of pieces of fiction, nonfiction, children's literature, feature stories and corporate content. Her expertise on food, cooking, nutrition and fitness information comes from years of in-depth study on those and other health topics.
Is Eating Too Many Bananas Bad for You?
A sliced banana on a cutting board. Photo Credit tycoon751/iStock/Getty Images

The banana is one of nature’s most nutritious foods. It contains many simple carbohydrates, which your body can break down rapidly for energy, and it’s also rich in vitamins and minerals like potassium and vitamin B-6. Eating too much of any type of food has its downsides, however, even if it’s a food as healthy as the banana.

Weight Gain

Bananas are unlikely to “cause” weight gain because putting on weight is associated with eating more calories than you burn and not necessarily with specific foods. So if you maintain an energy balance, you won’t gain weight even if you eat a lot of bananas. However, as fruits go, bananas have a relatively high calorie density -- eating many of them on a regular basis can raise your calorie intake more than other fruits. A large banana has 120 calories, but a large orange has just 85, and 1 cup of sliced strawberries has just 55. Dr. Melina Jampolis, CNN.com’s physician nutrition specialist, urges all of her patients to avoid thinking of fruit as a “free food” and to recognize that eating too much of it can add several hundred or more extra calories to their diets every day.

High Sugar Content

According to Harvard University, bananas are classified as a "medium-level" glycemic food, meaning they have a glycemic index level that is high enough to cause some fluctuations in blood sugar levels. If you eat a lot of foods that have relatively high GI levels, you may develop an elevated risk of Type 2 diabetes, heart disease or overweight. Since bananas do contain fiber, they are more slowly digested than other foods with similarly high sugar contents, but very ripe bananas may have a higher GI and be more likely to contribute to health issues if you eat too many of them.

No Variety

Eating too many bananas could also be harmful because it may prevent you from achieving a healthy balance in your diet. Although bananas contain plenty of beneficial nutrients, they don’t contain all of the same nutrients as other fruits, vegetables, whole grains and protein foods, all of which are important in a daily eating plan. If the bulk of your diet is made up of bananas, you could develop nutrient deficiencies over time.

When to Stop

There’s no surefire way to tell how many bananas is “too many” to eat. The U.S. Department of Agriculture recommends that healthy adults eat about 2 cups of fruit daily, which is equivalent to two whole bananas. Eating more than that isn’t likely to do you any physical harm beyond adding extra calories to your diet, but it’s healthiest to enjoy bananas in moderation along with a variety of other nutritious foods.

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