Does Eggplant Trigger IBS?
No. Eggplant (aubergine) is low-FODMAP at 75g (about 1 cup diced) and generally well-tolerated by people with IBS. It is one of the best low-FODMAP vegetables for Mediterranean and Asian cooking. Prepared dishes are usually safe if made without garlic or onion.
What Makes Eggplant Safe for IBS
Eggplant itself is not problematic. The FODMAP risk in eggplant dishes almost always comes from co-ingredients: garlic, onion, high-FODMAP tomato sauce, or dairy-heavy preparations.
How it works
Eggplant contains only trace amounts of fermentable carbs at standard portions. Its spongy texture absorbs oil and flavor, which is why it works so well in low-FODMAP cooking as a substitute for higher-FODMAP vegetables.
Common Symptoms
When someone reacts to an eggplant dish, the trigger is almost always the sauce or seasoning — check for garlic, onion, or excess tomato.
Portion Thresholds
Safe Portion
75g (about 1 cup diced)
Research Reference
Monash University: 75g of cooked eggplant is low-FODMAP. Larger servings become moderate.
Practical Tip
Roasted, grilled, or baked eggplant is the safest preparation. Traditional dishes like baba ganoush or moussaka often contain garlic — check or make at home.
Related Foods
No. Zucchini (courgette) is considered low-FODMAP and is generally safe for people with IBS when eaten in moderate portions (up to about 65g per sitting). It is one of the most well-tolerated vegetables on a low-FODMAP diet. Very large servings may still cause minor discomfort in some sensitive individuals.
It depends on the colour, and this one changed. Monash retested capsicum and downgraded it from unlimited: red is low-FODMAP at only 43g (about a third of a cup) and tests high for excess fructose by 75g — one cup. Green is far more forgiving, low at 75g and not high until around 310g. Yellow and orange have never been tested. If you have been treating all peppers as a free food, red is the one to rein in.
It depends on the type and the amount, and the numbers moved. Monash retested tomatoes and they are no longer unlimited: a common tomato is low-FODMAP at 65g, which is about half a medium one, and moderate by 75g. Cherry tomatoes are tighter still at 45g — roughly three. Canned tomatoes are the most generous at 100g. Plenty of older low-FODMAP guidance still calls tomatoes a free food, and that is out of date.
No — in fact, garlic-infused oil is the top recommended swap for IBS-friendly cooking. Fructans (the FODMAPs in garlic) are water-soluble but not fat-soluble, so the oil captures garlic flavor without the FODMAPs. It is safe at standard serving sizes and widely recommended by low-FODMAP dietitians.
Frequently Asked Questions
Is eggplant low-FODMAP?
Yes. Monash rates 75g (about 1 cup) as low-FODMAP. It is one of the most versatile IBS-safe vegetables.
Can I eat baba ganoush on a low-FODMAP diet?
Only if it is made without garlic. Traditional recipes rely on garlic — make your own using garlic-infused oil for the same flavor without the fructans.
Does eggplant cause gas?
Eggplant itself rarely causes gas. If you react, check the dish for garlic, onion, or high-FODMAP sauces.
Sources & References
FODMAP grade and serving-size data for Eggplant are based on published research from Monash University, the institution that developed the low-FODMAP diet. To understand how this data fits into a structured protocol, see our complete elimination diet guide.
- Monash University — About FODMAPs & IBS
- Monash University — Starting the Low-FODMAP Diet
- Halmos et al. (2014) — Low-FODMAP diet reduces IBS symptoms (Gastroenterology)
- NIDDK (NIH) — Irritable Bowel Syndrome
FODMAP thresholds are updated as new research is published. If you notice a portion that no longer matches the latest Monash guidance, let us know and we will update the page.
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