NutriDex

The Supplement Research Compendium
🍌

Banana

Musa acuminata

Potassium-rich, resistant-starch fruit for heart and gut

Moderate evidence 🍎Fruits

✚ Updated · How we grade evidence

Evidence tier
Moderate
Research weight
Citations
9 verified / 9
Classification
Fruits
❝
What the evidence says. Several controlled trials; effects real but modest or context-dependent.

Nutrition per serving 1 medium (118 g)

118gSERVING
  • Water 88.4 g75%
  • Sugars 14.4 g12%
  • Fibre 3.1 g3%
  • Other carbs 9.5 g8%
  • Protein 1.3 g1%
  • Fat 0.4 g0%
What's in one serving, by weight — average composition (USDA).
Potassium9%Vitamin B625%Vitamin C11%Manganese14%Fibre11%Magnesium8%
One serving as % of the adult daily requirement (FDA Daily Values). The bold outer ring = 100% of a day's needs.
105 kcal1.3 g protein3.1 g fiber0.4 g fat
NutrientPer serving% daily value
Potassium422 mg9%
Vitamin B60.43 mg25%
Vitamin C10 mg11%
Manganese0.32 mg14%
Fibre3.1 g11%
Magnesium32 mg8%
Folate24 mcg6%
Total sugars14 g29%

Composition data: USDA FoodData Central ↗

What is Banana?

Banana (Musa acuminata) is a fruit used for dietary potassium supports healthy blood pressure. NutriDex grades the human evidence as Moderate. Bananas are a dense source of dietary potassium and vitamin B6 with modest vitamin C and fibre. Large dose-response meta-analyses of prospective cohorts show that higher overall fruit intake is associated with lower risk of stroke, cardiovascular disease and all-cause mortality, and trials confirm that the potassium bananas supply lowers blood pressure, especially in people with hypertension. Resistant starch from unripe bananas and banana-derived starch modestly improves fasting glucose and insulin in controlled trials, and the soluble fibre/pectin aids stool regularity. However, almost no large trials test bananas as an isolated food, so benefits are inferred from potassium, fibre and total-fruit data rather than from the whole fruit directly. The sugar and rapidly available carbohydrate load of ripe bananas means the glycemic benefit applies mainly to unripe fruit or isolated starch. Overall the human evidence for cardiometabolic benefit is consistent but largely indirect.

Purported Benefits

✓Dietary potassium supports healthy blood pressure
✓Part of fruit intake linked to lower stroke and cardiovascular risk
✓Resistant starch (unripe) and pectin support glycemic and gut health
✓Quick, low-fat carbohydrate source for exercise fueling
✓Soluble and resistant fibre promote satiety and laxation

Dosing & Compounds

Typical Dose
1 medium banana (about 118 g edible) provides roughly 105 kcal and 422 mg potassium; 1-2 per day fits within general fruit recommendations (about 2 servings of fruit daily). Greener (less ripe) bananas carry more resistant starch and a lower glycemic impact.
Active Compounds
PotassiumVitamin B6 (pyridoxine)Vitamin CResistant starch (type 2, unripe)Pectin (soluble fibre)MagnesiumManganeseDopamine and catechin antioxidantsFructooligosaccharides (prebiotic)

Safety & Cautions

Generally very safe. Latex-fruit syndrome sufferers may cross-react to banana. The readily digestible sugars of ripe bananas can raise post-meal glucose, so people with diabetes should mind portion and ripeness. Those on potassium-sparing diuretics, ACE inhibitors/ARBs, or with advanced chronic kidney disease should moderate potassium intake to avoid hyperkalemia. Bananas are high in FODMAP fructans when ripe and may trigger IBS symptoms in sensitive individuals; they are not a notable oxalate source. Educational only — always check with your doctor or pharmacist before combining Banana with any medicine.

Key Studies

Meta-analysis Wang 2021 ✓ PubMed
Meta-analysis of 26 cohorts (~1.9 million adults): ~5 daily servings of fruit/vegetables (2 fruit, 3 vegetable) associated with the lowest total mortality, about 13% lower than 2 servings.
Meta-analysis Vahdat 2020 ✓ PubMed
Meta-analysis of RCTs in metabolic syndrome: resistant starch (the type found in unripe bananas) significantly reduced fasting plasma glucose (WMD ~-4.3 mg/dL) and improved insulin/HbA1c.
Meta-analysis Aune 2017 ✓ PubMed
Dose-response meta-analysis of 95 cohort studies: each 200 g/day of fruit and vegetables was associated with lower coronary heart disease, stroke, total cardiovascular disease and all-cause mortality, with benefit observed up to ~800 g/day.
Meta-analysis Aburto 2013 ✓ PubMed
Systematic review/meta-analysis: higher potassium intake reduced systolic BP by ~3.5 mmHg overall (more in hypertensives) and was linked to 24% lower stroke risk (RR 0.76).
Meta-analysis Hu 2014 ✓ PubMed
Meta-analysis of 20 prospective cohorts (~760,000 participants): stroke risk fell ~32% per 200 g/day increment in fruit consumption.
Meta-analysis Salt substitute CV outcomes meta-analysis (PMC) ✓ Full text
Systematic review/meta-analysis found potassium-enriched salt substitution lowered systolic BP by -4.80 mmHg and diastolic BP by -1.48 mmHg versus regular salt.
RCT Yin / J Hum Hypertens 2024 (SSaSS analysis) ✓ Source
Mediation analysis of SSaSS attributed the -3.3 mmHg systolic BP fall to a 15.2 mmol/day fall in sodium excretion and a 20.6 mmol/day rise in potassium excretion.
Guideline WHO Guideline: Potassium Intake for Adults ✓ Source
WHO recommends increasing dietary potassium to at least 90 mmol/day (3510 mg/day) to lower blood pressure and reduce risk of cardiovascular disease, stroke, and coronary heart disease in adults.
Cohort Larsson 2013 ✓ PubMed
Prospective cohort (~75,000 Swedish adults): higher total fruit/vegetable intake, especially apples/pears and leafy greens, was inversely associated with stroke risk (RR ~0.87).
9 sources cited · 9 verified Search all studies on PubMed ↗

Common questions about Banana

What is Banana used for?

Banana is most often taken for Dietary potassium supports healthy blood pressure, Part of fruit intake linked to lower stroke and cardiovascular risk, Resistant starch (unripe) and pectin support glycemic and gut health, Quick, low-fat carbohydrate source for exercise fueling. Potassium-rich, resistant-starch fruit for heart and gut

Does Banana work — what does the evidence say?

Moderate evidence. Several controlled trials; effects real but modest or context-dependent. Bananas are a dense source of dietary potassium and vitamin B6 with modest vitamin C and fibre. Large dose-response meta-analyses of prospective cohorts show that higher overall fruit intake is associated with lower risk of stroke, cardiovascular disease and all-cause mortality, and trials confirm that the potassium bananas supply lowers blood pressure, especially in people with hypertension. Resistant starch from unripe bananas and banana-derived starch modestly improves fasting glucose and insulin in controlled trials, and the soluble fibre/pectin aids stool regularity. However, almost no large trials test bananas as an isolated food, so benefits are inferred from potassium, fibre and total-fruit data rather than from the whole fruit directly. The sugar and rapidly available carbohydrate load of ripe bananas means the glycemic benefit applies mainly to unripe fruit or isolated starch. Overall the human evidence for cardiometabolic benefit is consistent but largely indirect.

What is the typical dose of Banana?

1 medium banana (about 118 g edible) provides roughly 105 kcal and 422 mg potassium; 1-2 per day fits within general fruit recommendations (about 2 servings of fruit daily). Greener (less ripe) bananas carry more resistant starch and a lower glycemic impact.

Is Banana safe? Any cautions or side effects?

Generally very safe. Latex-fruit syndrome sufferers may cross-react to banana. The readily digestible sugars of ripe bananas can raise post-meal glucose, so people with diabetes should mind portion and ripeness. Those on potassium-sparing diuretics, ACE inhibitors/ARBs, or with advanced chronic kidney disease should moderate potassium intake to avoid hyperkalemia. Bananas are high in FODMAP fructans when ripe and may trigger IBS symptoms in sensitive individuals; they are not a notable oxalate source.

How many studies support Banana?

NutriDex cites 9 sources for Banana, graded "Moderate".

Cite this page
APA

Peh, D. (2026). Banana (Musa acuminata): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 26 Jun 2026, from https://nutridex.info/s/banana

BibTeX
@misc{nutridex_banana,
  author       = {Peh, Daryl},
  title        = {Banana (Musa acuminata): Benefits, Dosage, Side Effects \& Evidence},
  year         = {2026},
  howpublished = {NutriDex --- The Supplement Research Compendium},
  url          = {https://nutridex.info/s/banana},
  note         = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-06-26}
}

For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.

← Back to the full dex · All substances