Banana
Bananas are nutrient-dense tropical fruits rich in potassium, fiber, and resistant starch, making them a convenient whole-food source of carbohydrates and micronutrients essential for cardiovascular and metabolic health.
Variants (7)
Nutrition · per ~140 g serving · ≈ 1–2 bananas
- Vitamin B60.78 mg46% DV
- Vitamin C18.5 mg21% DV
- Folate42.0 mcg11% DV
- Potassium761.6 mg16% DV
- Magnesium57.4 mg14% DV
- Inulin / Prebiotic fibre~4.2 g
Score · 70/100
Vitamins & minerals packed in relative to calories — the single biggest driver of the score.
How much protein it delivers, by absolute grams and per calorie.
Dietary fiber for gut health, satiety and steadier blood sugar.
Fat quality — unsaturated vs saturated, and trans-fat free.
Polyphenols, flavonoids and other beneficial plant compounds for this food group.
Low sugar with a high fiber-to-carb ratio scores best — gentler on blood sugar.
- Vitamin B633% DV
- Vitamin C15% DV
- Potassium12% DV
- Magnesium10% DV
- Folate8% DV
Overview
The banana is a staple fruit originating from Southeast Asia, now cultivated across tropical and subtropical regions worldwide. Its appeal in longevity nutrition stems from an exceptional potassium content (544 mg per 100g)—critical for blood pressure regulation and cardiovascular function—combined with resistant starch when slightly underripe, which acts as a prebiotic fiber. Bananas also contain notable amounts of vitamin B6, magnesium, and folate, supporting neurotransmitter synthesis and energy metabolism. The fruit's pectin and resistant starch promote healthy gut microbiota composition, linked to improved metabolic outcomes and reduced systemic inflammation. Medium-ripeness bananas offer an optimal balance: ripe bananas are easier to digest and higher in antioxidants like dopamine, while slightly green bananas contain more resistant starch for glycemic stability. This accessibility, affordability, and nutrient density have made bananas a foundational food in dietary patterns associated with longevity, particularly in Mediterranean and plant-forward diets. The natural carbohydrate content supports sustained energy without blood sugar spikes when consumed thoughtfully.
Health Benefits (4)
- Supports cardiovascular health and blood pressure regulationstrongHigh potassium content counteracts sodium's effects on blood vessel tension, supporting healthy resting blood pressure and reducing left ventricular hypertrophy risk
- Promotes healthy gut microbiota compositionmoderateResistant starch (especially in green bananas) acts as a prebiotic, selectively feeding beneficial bacteria and increasing butyrate production for intestinal barrier integrity
- Supports stable blood glucose levelsmoderatePectin and resistant starch slow gastric emptying and glucose absorption, reducing postprandial insulin spikes when consumed with protein or fat
- Enhances mood and cognitive functionmoderateVitamin B6 is essential for serotonin and dopamine synthesis; ripe bananas contain trace dopamine; tryptophan content supports endogenous serotonin production
Food Pairings
- ·Pair with nut butter (almond or peanut) because fat slows carbohydrate absorption and increases satiety, preventing glucose spikes
- ·Combine with Greek yogurt or cottage cheese because protein synergizes with banana's carbohydrates to stabilize blood sugar and enhance muscle protein synthesis
- ·Mix with cinnamon because this spice may enhance insulin sensitivity and reduce postprandial glucose responses to the fruit's natural sugars
- ·Blend with leafy greens (spinach, kale) because fat-soluble vitamins pair well with banana's water-soluble nutrients, creating a balanced micronutrient profile
Practical Tips
- ·Choose slightly green-tipped bananas for maximum resistant starch content; fully yellow bananas are higher in antioxidants but lower in prebiotic fiber
- ·Store at room temperature to allow ripening; refrigerate the peel only (skin darkens but flesh stays firm) once ripe to extend shelf life by 3-5 days
- ·Consume within 2 hours of exercise for optimal post-workout recovery due to carbohydrate replenishment and potassium replacement via sweat loss
- ·Slice and freeze overripe bananas for use in smoothie bowls, frozen smoothies, or as a dairy-free ice cream base—freezing preserves polyphenols and increases resistant starch conversion
Optimal Timing
Post-exercise, bananas replenish muscle glycogen via fast-digesting carbohydrates and replace lost potassium and magnesium through sweat. The natural sugars trigger insulin release, which amplifies amino acid uptake into muscle tissue.
Morning consumption (especially with protein) is also beneficial for sustained energy. Avoid consuming alone on an empty stomach if blood glucose sensitivity is a concern; pair with fat or protein.
Systems supported
body systems this food feedsPathways supported
biochemical reactions enabled by this foodCompared to other tropical fruit fruits
Per 100 g of the default form. Bars show how much higher or lower banana is than the average across 4 peer foods in this category. Green means a favorable direction; amber means the opposite.
What people ask about banana
What is banana?
Banana is classified as a tropical fruit (fruit). Bananas are nutrient-dense tropical fruits rich in potassium, fiber, and resistant starch, making them a convenient whole-food source of carbohydrates and micronutrients essential for cardiovascular and metabolic health.
Is banana healthy?
Banana scores 70/100 in Formulate, making it a solid choice. Its strongest contributions come from Vitamin B6, Vitamin C, Potassium. The score blends nutrient density, fiber, healthy fats, protein quality, bioactive compounds, and glycemic impact.
Is banana high in protein?
Not particularly. A 140 g serving provides about 2.4 g of protein (~5% of the 50 g daily value).
Is banana high in fiber?
Yes — it's a high-fiber food. A 140 g serving provides about 5.6 g of fiber (~20% of the 28 g daily value).
What vitamins and minerals are in banana?
In a 140 g serving, banana is highest in Vitamin B6 (~46% DV), Vitamin C (~21% DV), Potassium (~16% DV), Magnesium (~14% DV), Folate (~11% DV).
Is banana keto-friendly?
Not really. A 140 g serving has about 43 g of net carbs (48.6 g total minus 5.6 g fiber).
When is the best time to eat banana?
Best after a workout. Post-exercise, bananas replenish muscle glycogen via fast-digesting carbohydrates and replace lost potassium and magnesium through sweat. The natural sugars trigger insulin release, which amplifies amino acid uptake into muscle tissue.
How much banana should I eat?
A typical serving is around 140 g (~189 kcal), based on the FDA's Reference Amount Customarily Consumed for this food category. There's no fixed daily target — most adults benefit from rotating banana alongside several other fruit sources.
What pairs well with banana?
Banana pairs nicely with: Pair with nut butter (almond or peanut) because fat slows carbohydrate absorption and increases satiety, preventing glucose spikes; Combine with Greek yogurt or cottage cheese because protein synergizes with banana's carbohydrates to stabilize blood sugar and enhance muscle protein synthesis; Mix with cinnamon because this spice may enhance insulin sensitivity and reduce postprandial glucose responses to the fruit's natural sugars; Blend with leafy greens (spinach, kale) because fat-soluble vitamins pair well with banana's water-soluble nutrients, creating a balanced micronutrient profile.
Supplements that mirror Banana's nutrient profile
Encyclopedia entries that supply the same signature nutrients banana contributes. Click through to see clinical dose ranges, evidence quality, and bioavailable forms.
Signature nutrients in Banana
These are the nutrients bananacontributes meaningfully toward (≥10% DV per 100 g serving). Click one to see what it does in the body, which supplements concentrate it, and which other foods are top sources.