Traditional tzatziki is not low FODMAP, primarily because of the garlic. However, most of the other ingredients in tzatziki are naturally low in FODMAPs, which makes it one of the easier sauces to adapt with a couple of simple swaps.
Why Traditional Tzatziki Is High FODMAP
The problem comes down to one ingredient: garlic. Garlic contains fructans, a type of short-chain carbohydrate that pulls water into the small intestine and ferments rapidly in people with IBS or other gut sensitivities. Even small amounts of garlic can trigger symptoms during the elimination phase of a low FODMAP diet, and there’s no safe threshold during that stage. Monash University, the research group that developed the FODMAP system, recommends excluding garlic entirely during the first phase.
The second potential issue is the yogurt base. Standard Greek yogurt contains lactose, which is another FODMAP subgroup. Whether this bothers you depends on the amount and your individual tolerance, but during strict elimination, regular dairy yogurt is generally considered too high in lactose to be safe.
Everything else in a classic tzatziki, the cucumber, lemon juice, olive oil, dill, salt, is low FODMAP in normal serving sizes.
How to Make Tzatziki Low FODMAP
Since only two ingredients cause problems, the fix is straightforward.
For the garlic, replace it with garlic-infused olive oil. This works because fructans are water-soluble but not fat-soluble. When garlic cloves sit in oil, the flavor compounds and aroma transfer into the fat, but the fructans stay trapped in the garlic itself. You get the taste without the FODMAPs. Use one to two tablespoons of garlic-infused oil in place of both the minced garlic and any plain olive oil the recipe calls for. Make sure you buy a commercially produced infused oil (where the garlic has been strained out) rather than making your own, since homemade versions can carry food safety risks.
For the yogurt, switch to either lactose-free Greek yogurt or coconut yogurt. Lactose-free Greek yogurt is a direct swap with no change in flavor or texture. Coconut yogurt is low FODMAP at portions up to half a cup, which is plenty for dipping. If you go the coconut route, the taste will obviously shift slightly, but it still works well as a tzatziki base.
Ingredients You Don’t Need to Worry About
Cucumber is low FODMAP and can be used freely in the amounts a typical tzatziki recipe calls for. Lemon juice without added ingredients is also low FODMAP. Fresh herbs like dill and mint add flavor without adding FODMAPs. If you prefer a different flavor profile, swapping dill for fresh mint or even cilantro (with lime instead of lemon) keeps things in the safe zone while changing up the taste.
White wine vinegar, which some recipes include for a bit of tang, is also low FODMAP. Salt, pepper, and a pinch of cumin are all fine.
Portion Size Still Matters
Even with safe ingredients, portion size affects FODMAP load. A food that’s low FODMAP at a quarter cup can become moderate or high at larger servings. For a low FODMAP tzatziki, a standard serving of about two to three tablespoons as a dip or condiment keeps you well within safe ranges. If you’re using it more generously, like spooned over a grain bowl, just be mindful that the yogurt base is your main variable. Keeping your total yogurt intake at or below half a cup per sitting is a good guideline during the elimination phase.
Quick Low FODMAP Tzatziki Formula
- Base: Lactose-free Greek yogurt or coconut yogurt (up to ½ cup)
- Fat and flavor: 1–2 tablespoons garlic-infused olive oil
- Freshness: Diced cucumber, squeezed dry
- Acid: Lemon juice or white wine vinegar
- Herbs: Fresh dill, mint, or both
- Seasoning: Salt and pepper
Mix everything together, let it sit in the fridge for 15 to 20 minutes so the flavors meld, and you have a tzatziki that tastes close to the original without the FODMAP triggers. The whole process takes about five minutes. It keeps well in the fridge for two to three days, though the cucumber can release water over time, so give it a stir before serving.