Banana: what it contains and why it matters
Banana is a soft tropical fruit (kela). This page lists its nutritional content from published sources and explains which lab parameters it relates to.
Last reviewed: 2026-09-04
Nutritional content of banana
Per 100 g edible portion, from published composition data.
| Nutrient | Per 100 g | Source |
|---|---|---|
| EnergyRaw banana edible portion | 89 kcal | USDA |
| Carbohydrate | 22.84 g | USDA |
| Dietary Fiber | 2.6 g | USDA |
| Protein | 1.09 g | USDA |
| Total lipid (fat) | 0.33 g | USDA |
| Potassium | 358 mg | USDA |
| Magnesium | 27 mg | USDA |
| Vitamin C | 8.7 mg | USDA |
| Vitamin B6 | 0.367 mg | USDA |
Which lab parameters does banana relate to?
Potassium
Potassium helps nerves and muscles work and helps balance the body's fluids [WHO].
Vitamin C
Vitamin C supports the immune system and helps the body absorb non-heme iron from plant foods [WHO].
Magnesium
Magnesium supports muscle and nerve function and helps build bone [WHO].
Understand your Magnesium result →See all magnesium-rich foods →
Vegetarian and dietary notes
Banana is a raw botanical fruit suitable for both vegetarian and vegan diets.
Frequently asked questions
How much potassium is present in raw banana?
Raw banana contains 358 mg of potassium per 100 g [USDA]. Potassium is an intracellular electrolyte that participates in fluid balance and neuromuscular signaling.
What is the carbohydrate and fiber content of banana?
Per 100 g, raw banana provides 22.84 g of total carbohydrate, which includes 2.6 g of dietary fiber and naturally occurring sugars like glucose, fructose, and sucrose [USDA].
How much vitamin C does banana provide?
Banana provides 8.7 mg of vitamin C per 100 g [USDA]. Vitamin C functions as a water-soluble antioxidant and is required for collagen biosynthesis.
What is the magnesium content of banana?
A 100 g portion of raw banana contains 27 mg of magnesium [USDA]. Magnesium serves as an enzymatic cofactor in processes including protein synthesis and energy production.
Does banana contain vitamin B6?
Yes, raw banana provides 0.367 mg of vitamin B6 per 100 g [USDA]. Vitamin B6 acts as a coenzyme in amino acid metabolism and neurotransmitter synthesis.
Sources
- USDA — USDA FoodData Central, Agricultural Research Service. https://fdc.nal.usda.gov/
- WHO — World Health Organization — nutrition fact sheets. https://www.who.int/