Most plain vinaigrettes made with olive oil, safe vinegars, and herbs are low FODMAP, as long as they skip garlic and onion. The challenge is that nearly every store-bought dressing contains one or both of those ingredients, often hidden under vague label terms. Your safest options are either certified low FODMAP brands or simple homemade dressings where you control every ingredient.
Why Most Store-Bought Dressings Are a Problem
Garlic and onion are high in fructans, a type of FODMAP that triggers symptoms for many people with IBS. These two ingredients show up in almost every commercial salad dressing, sometimes in obvious forms like “garlic powder” or “onion powder,” and sometimes hidden behind terms like “natural flavors,” “flavoring,” or “spices.” In the U.S., federal labeling rules allow manufacturers to list onion powder, garlic powder, onion juice, and garlic juice simply as “natural flavor” or “flavoring” on the label. That means a dressing that looks safe based on a quick ingredient scan could still contain your biggest triggers.
High FODMAP sweeteners are the other common issue. Honey, high fructose corn syrup, and agave are all high FODMAP and frequently used in dressings like honey mustard, Asian-style sesame, and balsamic glazes.
Oils, Vinegars, and Bases That Are Safe
The foundation of any low FODMAP dressing is oil and acid. Olive oil and canola oil are both low FODMAP in normal serving sizes. For your acid component, several vinegars work well: red wine vinegar, white wine vinegar, rice vinegar, and balsamic vinegar are all commonly used without issue. Apple cider vinegar has been lab-tested and confirmed low FODMAP at a 5 ml (one teaspoon) serving. Fresh lemon juice and lime juice are also safe and add brightness without any FODMAP concerns.
Dijon mustard and regular yellow mustard are generally safe bases for creamy-style dressings, as long as they don’t contain added garlic or onion. Maple syrup in small amounts works as a sweetener in place of honey.
The Garlic-Infused Oil Trick
One of the most useful things to know on a low FODMAP diet is that garlic-infused oil gives you garlic flavor without the fructans. The reason is chemistry: fructans dissolve in water but not in fat. When garlic cloves sit in olive oil, the flavor compounds transfer into the oil, but the fructans stay trapped in the garlic itself. You get the taste without the trigger. This is why garlic-infused olive oil is a staple in low FODMAP cooking, and it makes an excellent base for vinaigrettes.
One important safety note if you make your own: garlic in oil creates conditions where botulism-causing bacteria can grow. If you’re infusing oil with fresh garlic at home, strain out all the garlic pieces and refrigerate the oil immediately. Use it within 2 to 4 days. Commercially produced garlic-infused oils go through processes that make them shelf-stable, so buying a pre-made version is the easier and safer route for most people.
Herbs and Seasonings You Can Use Freely
Low FODMAP dressings don’t have to be bland. A wide range of dried and fresh herbs are naturally low in FODMAPs. For Italian-style vinaigrettes, basil, oregano, rosemary, parsley, and sage are all safe. For something with a French flavor profile, try thyme, tarragon, or black pepper. Cumin, ginger, coriander seed, and mint work well in Middle Eastern-inspired dressings. Sesame seeds, chili flakes, and fenugreek are also fine.
Salt, black pepper, and saffron round out your seasoning options. The only herbs and spices to watch are those in pre-mixed blends, which frequently contain onion and garlic powder.
Simple Dressings You Can Make at Home
The easiest low FODMAP dressing is a classic vinaigrette: three parts olive oil to one part red wine vinegar, with salt, pepper, and a teaspoon of Dijon mustard whisked together. It takes about 30 seconds and works on almost any salad.
For garlic flavor, swap regular olive oil for garlic-infused olive oil in that same ratio. Add dried oregano and basil for an Italian version, or fresh chopped parsley and a squeeze of lemon for something lighter. A maple Dijon variation works well too: replace the vinegar with equal parts lemon juice and a small drizzle of maple syrup, then whisk with Dijon and olive oil.
For a creamy option, blend a tablespoon of tahini with lemon juice, a splash of water to thin it, salt, and cumin. Tahini is made from sesame seeds and is low FODMAP, giving you a rich texture without dairy or high FODMAP ingredients.
Certified Low FODMAP Brands
If you’d rather grab something off the shelf, Fody Foods is the most widely available brand that carries certified low FODMAP salad dressings. Their entire dressing line is made without onion or garlic, and each product is lab-tested and certified low FODMAP. Their options include a balsamic vinaigrette, maple Dijon, garden herb, and a vegan Caesar. The ingredients lists are short, which makes them easy to verify yourself.
When shopping for other brands, look for the Monash University or FODMAP Friendly certification logos on the packaging. Without that certification, you’ll need to read every ingredient carefully. Remember that “natural flavors” can legally contain garlic or onion derivatives, so if you see that term on a non-certified product, it’s a gamble.
Dressings to Avoid
Some dressing styles are almost always high FODMAP. Ranch dressing typically contains onion and garlic powder along with buttermilk. Honey mustard uses honey as a primary ingredient. Thousand Island and French dressings usually contain onion in some form. Creamy Caesar dressings often rely on garlic as a defining flavor. Asian-style dressings frequently combine garlic, onion, and high fructose corn syrup.
Even “simple” balsamic vinaigrettes from restaurants or deli counters usually contain minced garlic or shallots. When eating out, your safest bet is to ask for olive oil and vinegar on the side and dress the salad yourself.