Is cucumber low FODMAP?

By DietTribe · Updated 20 July 2026 · How we source our data

Yes — cucumber is low FODMAP at any reasonable serving size. It's one of the easiest, most reliable vegetables on a low FODMAP diet, alongside lettuce and carrot.

A genuinely low-risk vegetable

Cucumber is mostly water with a very low carbohydrate content, which leaves little room for FODMAPs to accumulate regardless of how much you eat. Unlike foods where a small serve is fine but a larger one isn't (asparagus, apple), cucumber doesn't really have that threshold — it stays comfortably low FODMAP across normal eating patterns.

Where things can still go wrong

If cucumber shows up in something that causes symptoms, the more likely culprits are what it's served with:

  • Tzatziki or yoghurt-based dips (lactose, unless a lactose-free base is used)
  • Pickling liquids with garlic, onion, or added sweeteners
  • Sandwich or wrap fillings that include wheat bread, garlic aioli, or hummus (see our is hummus low FODMAP guide)

For more reliably low FODMAP vegetables, see our low FODMAP food list guide.

Frequently asked questions

Is cucumber low FODMAP in any quantity?

Cucumber's very low carbohydrate content means it stays low FODMAP even at generous serving sizes — it's one of the more forgiving vegetables on the diet, similar to lettuce.

Does peeling or deseeding cucumber matter for FODMAP?

No — this isn't necessary for FODMAP purposes. Peeling and deseeding are sometimes recommended for other digestive sensitivities (fibre content), but they don't change cucumber's FODMAP rating.

What about pickled cucumber (gherkins)?

Plain pickled cucumber is generally fine, but check the pickling liquid's ingredient list — garlic, onion, and high-fructose sweeteners sometimes show up in commercial pickles and would be the actual source of any symptoms, not the cucumber itself.

Medical & accuracy disclaimer: DietTribe provides general information, not medical advice. FODMAP tolerance is highly individual and IBS is a medical condition — talk to your doctor or dietitian before starting an elimination diet. Internet FODMAP ratings (including ours) are not a substitute for Monash University's lab-tested data, and product formulations change — always check the ingredient list on the physical package and confirm with the manufacturer if unsure.

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