onion
Vegetables
Is onion mediterranean-compatible?
See whether onion fits a mediterranean diet, with a clear compatible-or-avoid verdict plus its FODMAP, histamine and other trigger ratings in one place.
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Sensitivity notes
Why mediterranean diet checker matters
The Mediterranean diet is based on traditional foods from countries bordering the Mediterranean Sea. It emphasizes olive oil, fish, vegetables, whole grains, and moderate wine consumption while limiting red meat and processed foods.
- Make olive oil your primary fat source
- Eat fish at least twice per week
- Enjoy meals with family and friends - it's part of the lifestyle
- Red wine in moderation (optional) with meals
- Limit red meat to a few times per month
Sensitivities
What onion contains
FODMAPs
Histamine & Amines
Plant compounds
Irritants
Additives
Allergens
Diet fit
Where onion fits
Therapeutic diets
Lifestyle diets
Religious diets
What to know about onion
Onion is graded E for fructans and E for total FODMAPs, the top of our scale, which is why it is the single most common trigger people uncover once they start logging food against symptoms. The reaction is a carbohydrate problem rather than an allergy: onion is A for histamine, A for oxalates, A for lectins and A for nightshades, so if onion bloats you the fructans are almost certainly the mechanism. It also grades E for low fermentation SIBO plans. The frustrating part is that fructans are water soluble and heat stable, so caramelizing, slow simmering or fishing the pieces out of a sauce does not make onion any safer, and onion hidden in stock, gravy and spice blends is why so many people react to restaurant food they cannot account for.
Watch for
- Fructans and total FODMAPs both graded E, the highest tier we use, and the grade does not soften between raw and cooked onion
- Cooking is not a fix: fructans dissolve out of the onion into the pan and stay in the liquid, so straining the pieces out leaves the trigger in the sauce
- Hidden onion drives most unexplained flare-ups: stock cubes, gravies, curry pastes, spice rubs, chips and anything listed as seasoning or natural flavor
- Graded E for low fermentation SIBO, so onion is usually one of the first things pulled when working through a SIBO protocol
- Clean on the rest of the chemistry (histamine A, oxalate A, lectin A, nightshade A, with only a borderline B for histamine liberation), which is why an onion reaction is nearly always intolerance rather than allergy
Explore related in Vegetables
Compare similar foods to build a personalized list of swaps that work for your system.
Mediterranean Guide
Everything you need to know about mediterranean compatibility and smart food choices.
The Mediterranean diet is based on traditional foods from countries bordering the Mediterranean Sea. It emphasizes olive oil, fish, vegetables, whole grains, and moderate wine consumption while limiting red meat and processed foods.
These foods are typically compatible with a Mediterranean approach:
View all safe options
Practical guidance for following a Mediterranean diet:
- 1Make olive oil your primary fat source
- 2Eat fish at least twice per week
- 3Enjoy meals with family and friends - it's part of the lifestyle
- 4Red wine in moderation (optional) with meals
- 5Limit red meat to a few times per month
Pro tip: Keep a food diary to track your reactions. The Triggerbites app makes this easy with automatic pattern detection.
Want personalized tracking?
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Get the AppFAQ
Does onion fit a mediterranean diet?
Mediterranean: fits well for most plans.
What if I eat it occasionally?
Still check preparation and add-ins.
What are safer swaps?
Compare within the Vegetables group.