Macadamia Oil

Low FODMAP

Typical portion

Any typical portion Low

Macadamia oil is Low FODMAP, a pure fat with essentially no carbohydrate for your gut to ferment.

As a pure oil, it is all fat with negligible carbohydrate, so it carries no FODMAPs and stays comfortable at any typical portion.

Use it freely for drizzling, roasting, or finishing dishes, and it makes a naturally buttery base for a garlic-infused oil if you want that flavor without the fructans.

Why macadamia oil is rated low

Macadamia oil is low FODMAP. The rating is estimated from what it is made of rather than a measured serving: it is the fat pressed out of macadamia nuts, with essentially no carbohydrate left in it, so there is nothing fermentable to count. Any typical portion is rated low. The oil and the nut are not interchangeable, though. Whole macadamias keep their carbohydrate and are rated as a food in their own right, so the oil's rating says nothing about how many nuts you can eat, and a cake or roasting tray made with the oil is only as low as the rest of what is in it.

What changes your risk

Oil versus whole nut Macadamias as nuts have their own rating and their own serving question. Only the pressed oil sits at Any typical portion.
Roasting does not change the vegetables Roasting in macadamia oil adds no FODMAPs, and it does not remove any either. Onion wedges or garlic cloves in the tray stay as high as they were raw, because roasting lets nothing leave the food.
Baking with it In muffins, cakes and biscuits the oil is the easy part. Ordinary wheat flour, honey and milk are what set the load, so the swaps that matter are flour, sweetener and dairy.
Spreads and nut mixes Macadamia spreads and nut blends often add other nuts, dates or honey. Check the label, because cashews and pistachios in particular are not low FODMAP choices.
Homemade garlic oil Macadamia oil makes a buttery base for garlic-infused oil, which stays low because the FODMAPs in garlic do not dissolve into oil. Strain out every piece of garlic, keep it in the fridge and use it up promptly.

What else works

For the same mild, buttery role in cooking, light olive oil, rice bran oil or canola oil all work, and any plain pure oil is fat rather than carbohydrate. If it is macadamia flavour you are after, whole macadamias, walnuts, pecans and peanuts are low FODMAP nuts to look up on their own pages. The lookalikes to be careful with are nut products that bring other ingredients along: cashew and pistachio blends, honey-roasted nut mixes, and spreads sweetened with dates or honey do not share the oil's rating.

How to keep it low

Store macadamia oil sealed in a cool, dark cupboard, and buy a bottle that lists only macadamia oil on the label. Its mild taste suits a tray of potato, carrot, zucchini and red bell pepper, fish brushed with it before baking, or a cake made with gluten free flour and maple syrup or table sugar. When a recipe calls for onion or garlic, cook with a garlic-infused macadamia oil you have strained yourself and finish with chives or the green tops of spring onions.

Common questions

is macadamia oil low fodmap

Yes. Macadamia oil is rated low FODMAP, estimated from what it is made of: it is a pressed fat with essentially no carbohydrate. The rating covers Any typical portion.

are macadamia nuts low fodmap too

The whole nut is rated separately from the oil, because it keeps the carbohydrate the oil leaves behind. Check the macadamia nut page for its own serving rating rather than relying on the oil's.

can i roast vegetables in macadamia oil on low fodmap

Yes, the oil adds nothing to the FODMAP load. The vegetables decide it, so potato, carrot, zucchini and bell pepper are good choices, while onion and garlic in the tray stay high because roasting does not remove FODMAPs.

what can i use instead of macadamia oil

Light olive oil, rice bran oil or canola oil fill the same mild role in cooking and baking. For a garlic flavour, use a garlic-infused oil with every solid piece strained out.

Learn more

Informational only, not medical advice. Individual tolerance varies. Talk to a healthcare professional or a dietitian for personal guidance.

Macadamia Oil is an estimated rating: it is inferred from the food's ingredients and composition and cross-checked, not measured directly in the papers below. The low, moderate and high cutoffs are still those of Varney et al. (2017).

References

Fructan and free fructose content of common Australian vegetables and fruit. Muir et al. (2007), J. Agricultural and Food Chemistry 55(16):6619-6627.
Measurement of short-chain carbohydrates in common Australian vegetables and fruits by HPLC. Muir et al. (2009), J. Agricultural and Food Chemistry 57(2):554-565.
Quantification of fructans, galacto-oligosaccharides and other short-chain carbohydrates in processed grains and cereals. Biesiekierski et al. (2011), J. Human Nutrition and Dietetics 24(2):154-176.
Dietary sorbitol and mannitol: food content and distinct absorption patterns. Yao et al. (2014), J. Human Nutrition and Dietetics 27(Suppl 2):263-275.
FODMAPs: food composition, defining cutoff values and international application. Varney et al. (2017), J. Gastroenterology and Hepatology 32(Suppl 1):53-61. Supplies the low, moderate and high cutoffs used on this page.