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Banana Nutrition Facts and Health Benefits

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Bananas are a popular fruit known for their potassium content and numerous health benefits. This article will explore their nutritional profile, health advantages, potential allergies, adverse effects, and more.

Nutrition Facts

Bananas are a good source of complex carbohydrates, potassium, and essential vitamins. A medium-sized banana (118g) provides 105 calories, 27g of carbohydrates, and 1.3g of protein. As bananas ripen, their resistant starch converts to sugar, so the glycemic index ranges from 48-54. Below are the nutritional facts per 100g.

Health Benefits

Bananas offer numerous health benefits, including:

  1. Improving diabetes management
  2. Promoting regularity and digestive health
  3. Aiding weight loss
  4. Lowering blood pressure
  5. Assisting in wound healing

Improves Diabetes Management

Green bananas are high in resistant starch, which acts like fiber during digestion. A review of several studies found that green banana flour is effective in improving insulin sensitivity, promoting weight loss, and reducing some of the liver and kidney issues associated with diabetes.

Promotes Regularity

Bananas are a good source of prebiotics, the fermentable fibers that help feed "good bacteria" in the gut. Studies show that pairing bananas with foods that contain live cultures is a great way to support gut health, digestion, and regularity. Green bananas have also shown benefits for constipation and diarrhea treatment in children.

Aids Weight Loss

Bananas are low in calories but high in filling fiber, making them a great snack or breakfast choice for weight loss. Studies show that increased fiber intake and calorie reduction can lead to weight loss. Adding 14 grams of fiber to the diet (or reducing calories by 10%) per day can lead to a weight loss of 4.4 pounds over four months.

Lowers Blood Pressure

Bananas are a good source of potassium, which can help lower blood pressure when paired with a low-sodium diet. Eating bananas regularly can help keep blood pressure down and prevent complications like strokes and kidney disease.

May Assist Wound Healing

Bananas offer wound-healing nutrients like vitamin C and other antioxidants. While using the inside of banana peels for wound healing is not fully supported by modern medicine, it is a popular folk remedy. Vitamin C is a precursor to collagen, an essential component of skin integrity.

Adverse Effects

While bananas are generally a healthy fruit, some potential adverse effects should be considered. Individuals with diabetes should monitor their consumption due to the fruit's sugar content, while those with kidney disease or other conditions requiring potassium restriction should be cautious of the high potassium levels in bananas. Additionally, gastrointestinal issues like gas, bloating, or stomach cramps may arise for some people due to the fiber content or specific carbohydrates present in bananas.

To minimize potential adverse effects, it is important to practice good oral hygiene to reduce the risk of tooth decay and be aware of any possible drug interactions, particularly with medications that affect potassium levels in the body. Always consult with a healthcare professional or registered dietitian for personalized advice based on individual needs and conditions.


Although rare, banana allergies can occur, sometimes in conjunction with a latex allergy. Symptoms may include hives, vomiting, dizziness, or anaphylaxis. Consult an allergist for a full evaluation if you suspect an allergy.


Banana varieties are incredibly diverse, with over 1,000 types grown across the globe. The most well-known and widely consumed variety is the Musa Cavendish, which accounts for 45% of the global banana market. However, many other unique varieties exist, differing in size, color, taste, and texture. Some examples include the sweet and creamy Lady Finger banana, the tangy and aromatic Apple banana, and the red-skinned Red banana, which has a slight raspberry flavor.

Storage and Food Safety

When it comes to storing bananas, it's essential to consider their ripening stage and the desired timeframe for consumption. Green bananas can be left at room temperature, uncovered, to ripen. To speed up the ripening process, you can place them in a paper bag or near other ripe fruits, which release ethylene gas—a natural ripening agent. Conversely, avoid storing bananas in plastic bags, as this traps humidity and can lead to spoilage.

Once bananas reach your preferred ripeness level, you can extend their shelf life by placing them in the refrigerator. While the peel may darken or even turn black, the fruit inside remains unaffected. For longer storage, peel and slice ripe bananas before freezing them in airtight bags. This method is perfect for later use in baking, smoothies, or other recipes. Remember to practice good hygiene by washing your hands before handling the fruit, and there is no need to wash or blanch bananas prior to freezing.

Bananas are available year-round and can be purchased green for ripening at home.

How to Prepare

Enjoy bananas in a variety of ways, such as adding them to oatmeal or yogurt, spreading mashed banana on toast, or freezing for a healthy dessert. Banana peels are also edible and can be used in vegan and Japanese recipes.

Incorporating Bananas into Your Diet

Adding bananas to your daily meal plan is a simple and delicious way to boost your nutrient intake. Here are some creative ideas for incorporating bananas into your diet:

Breakfast Ideas

  1. Create a nutritious smoothie by blending a banana with yogurt, milk, or a plant-based milk alternative, and other fruits like strawberries or blueberries.
  2. Bake banana oatmeal muffins for a grab-and-go breakfast option that's both filling and satisfying.
  3. Prepare a chia seed pudding with mashed banana, chia seeds, milk, and a touch of honey or maple syrup for a healthy, fiber-rich start to your day.

Snack Ideas

  1. Dip banana slices in nut butter, like almond or peanut butter, for a satisfying and energy-boosting snack.
  2. Create a trail mix with banana chips, nuts, seeds, and dark chocolate chips for a portable and nutrient-dense snack.
  3. Spread a rice cake or whole-grain cracker with cream cheese or Greek yogurt and top it with banana slices for a balanced and tasty snack.

Lunch and Dinner Ideas

  1. Add sliced bananas to your salad for a touch of natural sweetness and extra nutrients.
  2. Incorporate mashed bananas into your veggie burger recipe for added moisture and a hint of natural sweetness.
  3. Make a unique and flavorful curry with bananas, vegetables, and your choice of protein for a delicious and nutrient-packed meal.

Dessert Ideas

  1. Bake a healthier version of banana bread by using whole-wheat flour and reducing the amount of sugar and fat in the recipe.
  2. Prepare a simple banana ice cream by blending frozen banana slices with a splash of milk or milk alternative until smooth and creamy.
  3. Create a tropical fruit salad with banana slices, pineapple chunks, mango, and a sprinkle of shredded coconut for a refreshing and nutrient-rich dessert.

Incorporating bananas into your diet is an easy and delicious way to increase your daily nutrient intake. With their wide range of health benefits and versatility in recipes, bananas are an excellent addition to a well-rounded and balanced diet.


  1. Green banana consumption improves metabolic and bowel indices in healthy humans: This is a study published in the Journal of Functional Foods that examines the effects of green banana consumption on metabolic and bowel indices in healthy adults. The study found that consuming green bananas had positive effects on insulin sensitivity, bowel regularity, and other metabolic markers.


  1. The role of prebiotics in gut microbiota, immune system, and inflammation: This is a review article published in the journal Gut Microbes that discusses the role of prebiotics, including those found in bananas, in promoting gut health and reducing inflammation. The article also explores the potential therapeutic applications of prebiotics in various diseases.


  1. Potassium intake, stroke, and cardiovascular disease: a meta-analysis of prospective studies: This is a meta-analysis of prospective studies that examines the relationship between potassium intake and the risk of stroke and cardiovascular disease. The study found that higher potassium intake was associated with a lower risk of stroke and cardiovascular disease.


William H. McDaniel, MD

Dr. Robert H. Shmerling is the former clinical chief of the division of rheumatology at Beth Israel Deaconess Medical Center (BIDMC), and is a current member of the corresponding faculty in medicine at Harvard Medical School.

Medically Evaluated by:
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