Low-FODMAP cooking

Garlic substitute

The short answer

Garlic-infused oil is the best overall swap. Gently heat garlic in oil, then lift out the cloves. Garlic's fructans are water-soluble but not oil-soluble, so the oil carries the full warm, roasted-garlic aroma into your cooking while the FODMAPs stay behind in the discarded cloves — no other swap gets this close to real garlic flavour.

Why garlic triggers symptoms

High in Fructans

Like onion, garlic is loaded with fructans, and Monash's testing ranks it among the highest-fructan foods of all — which is why even a single clove is enough to bother sensitive guts. The fructans aren't absorbed in the small intestine, so they ferment further down and produce gas and bloating. And because it's the fructans doing this and not the flavour oils, you can genuinely have the taste without the trigger: heat garlic in fat, strain it out, and the aroma comes with you while the water-loving fructans do not.

In short, garlic is high in fructans — chain-like carbohydrates (the “oligosaccharides” in FODMAP) that the small intestine can't break down, so gut bacteria ferment them and produce gas. These are all FODMAPs — the fermentable carbs behind most IBS food triggers.

There's no low serving of raw or cooked garlic — Monash rates it high from the smallest amounts — and garlic powder and garlic salt are high too, roughly ⅛ teaspoon of powder standing in for a clove.

The best low-FODMAP garlic substitutes

No single swap does everything garlicdoes, so pick the one that fits the job — here’s how each performs, and where it doesn’t.

Garlic-infused oil

1 tbsp infused oil ≈ the flavour of 1–2 cloves of garlic

In the kitchen: Buy it, or make it by warming crushed cloves in oil over low heat for a few minutes and straining them out. Drizzle it in at any stage — it's brilliant as the starting fat or finished over pasta, roast vegetables and dressings.
Taste: A genuinely garlicky, warm, slightly sweet roasted-clove aroma — the closest any swap gets to the real thing.
Where it falls short: It's pure flavour, so it can't do texture: no minced garlic in a dressing, no soft cloves in a confit. Homemade infused oil also carries a real botulism risk if left at room temperature — keep it refrigerated and use it within a few days, or buy a commercially made bottle.

Asafoetida (hing)

A small pinch (about ⅛ tsp) bloomed in hot oil ≈ 1 clove of garlic

In the kitchen: The classic South Asian allium replacement — always fried briefly in hot oil first to mellow and bloom it. Excellent in dals, curries and spiced vegetable dishes.
Taste: Sharp and sulphurous raw; turns into a savoury, garlic-and-onion roundness once cooked.
Where it falls short: Many brands bulk it out with wheat flour — pick a gluten-free one if you need to. Its flavour is more "savoury allium" than specifically garlic, and it's easy to overdo.

Garlic chives / garlic scapes (green parts)

2–3 tbsp snipped garlic chives ≈ a light, fresh hit of garlic

In the kitchen: Use the green leaves and stir them in late or raw. Good in stir-fries, omelettes and dumpling fillings for a gentle garlicky lift.
Taste: Mild, fresh, grassy garlic without the pungency of a raw clove.
Where it falls short: Delicate and easily lost — they can't stand in for the punch of roasted or raw crushed garlic, and they wilt quickly with heat.

Infused oil plus a splash of tamari (for depth)

1 tbsp garlic-infused oil + 1 tsp tamari to deepen a savoury dish

In the kitchen: When you want the umami weight that garlic gives a sauce or marinade, back the infused oil with a little tamari or soy sauce. Works well in stir-fries, dressings and glazes.
Taste: Savoury and rounded — the tamari fills in the background umami the oil alone can't.
Where it falls short: Tamari adds saltiness and colour, so adjust the rest of your seasoning; it's a supporting move, not a garlic flavour on its own.

See the FODMAP data

Every serving threshold below is drawn from published research with the sources shown, so you can see exactly why each food lands where it does.

Garlic — see the serving data→Garlic powder (also high)→Garlic bread (double trigger)→Onion — the other allium→

The bottom line

Garlic-infused oil is one of the great low-FODMAP wins — it really does taste like garlic, and it covers most cooking. Where it can't follow you is anywhere garlic is the texture rather than the seasoning: a spoon of raw minced garlic in a Caesar dressing, sticky roasted whole cloves you spread on bread, or a garlic confit. Nothing low-FODMAP reproduces those. The honest closest is infused oil brushed generously over what you're making, plus a pinch of asafoetida for depth.

Common questions

What is the best low-FODMAP substitute for garlic?

Garlic-infused oil is the best substitute by a wide margin. Because garlic's fructans don't dissolve into oil, gently heating garlic in oil and removing the cloves gives you the real roasted-garlic aroma with none of the FODMAPs. Use it anywhere you'd normally start a dish with garlic.

Is garlic-infused oil really low FODMAP?

Yes. Garlic's fructans are water-soluble, not fat-soluble, so they don't transfer into the oil — the flavour compounds do. As long as you remove the solid garlic pieces, the oil itself is low-FODMAP. Just make it safely: keep homemade infused oil refrigerated and use it quickly, or buy a commercial bottle.

Does cooking garlic make it low FODMAP?

No. Cooking, roasting or frying garlic doesn't break down its fructans, so cooked garlic is still high FODMAP. The only way to keep the flavour without the trigger is to extract it into oil and discard the solids, or to use asafoetida in its place.

More low-FODMAP swaps

Onion substitute→Honey substitute→Apple substitute→Wheat flour substitute→Milk substitute→Yogurt substitute→Mushrooms substitute→Beans substitute→Mango substitute→

This page is for general cooking and information only and is not medical advice. FODMAP content varies with ripeness, processing, and brand, and serving size is what determines tolerance. Always work with your doctor or a registered dietitian on dietary changes for IBS.