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A banana is mostly water and carbohydrates, with smaller amounts of protein, fat, vitamins, and minerals.
For a medium banana (about 118 g), the approximate composition is:
Component
Amount
Water
~88 g (75%)
Carbohydrates
~27 g
• Sugars
~14 g
• Starch
~6 g (more in unripe bananas)
• Fiber
~3 g
Protein
~1.3 g
Fat
~0.4 g
Calories
~105 kcal
Key Vitamins and Minerals
Potassium: ~422 mg
Vitamin B6: ~0.4 mg
Vitamin C: ~10 mg
Magnesium: ~32 mg
Manganese: ~0.3 mg
Small amounts of folate, riboflavin, and other micronutrients
How Ripeness Affects Composition
Green (unripe) bananas contain more starch, especially resistant starch.
Yellow ripe bananas contain more simple sugars (glucose, fructose, and sucrose), making them sweeter.
Overripe bananas have even more sugars as starch continues to break down.
Bananas are particularly valued for their carbohydrate content (quick energy), potassium, fiber, and vitamin B6.

09/08/2026

09/08/2026

08/08/2026

08/08/2026