Is banana low FODMAP?
Yes — but only when unripe. Firm, slightly green bananas are low-FODMAP. Ripe yellow bananas with brown spots become high-fructose.
1 medium unripe (firm, no brown spots) banana; 1/3 of a ripe banana max
Excess fructose (when ripe)
Banana is one of the most-asked questions because the answer changes as the fruit ripens. Unripe = safe; ripe = trigger is the simple rule.
The ripeness rule
As bananas ripen, starches convert to fructose. Per Monash University:
- Firm, slightly green or just-yellow banana = low FODMAP at 1 medium fruit
- Yellow with green tips = borderline, eat only half
- Yellow with brown speckles = high FODMAP, limit to 1/3 banana
- Mostly brown = high FODMAP, avoid
This is one of the few foods where you can literally control your own FODMAP load by buying earlier and eating sooner.
Practical tips
- Buy bananas with a hint of green; eat within 2 days
- For longer storage, keep them separated from other fruit (ethylene gas accelerates ripening)
- Banana bread / banana pancakes: usually made with overripe bananas → high FODMAP. Make at home with firm bananas instead.
- Smoothies with banana: a quarter of a ripe banana for sweetness is fine; a whole one is not.
What about plantains?
Plantains (the cooking variety) are low-FODMAP at 1 cup cooked, regardless of ripeness. Tostones and twice-fried plantains are good carb alternatives if you miss the texture.
Source: Monash University FODMAP team. Educational content; please consult a registered dietitian for personalized guidance.
Common questions
- Is Banana low-FODMAP?
- It depends on the portion. Banana is low-FODMAP in small servings but turns high-FODMAP as the amount increases — portion size is what matters. Safe serving: 1 medium unripe (firm, no brown spots) banana; 1/3 of a ripe banana max.
- What's a safe serving of Banana?
- 1 medium unripe (firm, no brown spots) banana; 1/3 of a ripe banana max. Going above this can push it into high-FODMAP territory and trigger symptoms in sensitive people.
- Which FODMAPs are in Banana?
- Mainly Excess fructose (when ripe). Based on Monash University testing data. These are the carbohydrate groups that can trigger IBS symptoms when poorly absorbed.