Australian Nut, Bopple Nut, Bush Nut, Huile de Macadamia, Macadamia integrifolia, Macadamia Oil, Macadamia tetraphylla, Noix d'Australie, Noix Macadamia, Noix de Macadam, Noix de Macadamia, Noix de Queensland, Noyer du Queensland, Nuez de Macadamia, Queensland Nut.


Overview Information

Macadamia nut is the seed of the macadamia tree. Macadamia nuts are native to Australia. They are very high in a type of healthy fat called monounsaturated fat.

Roasted macadamia nuts are a popular snack. But some people also use macadamia nuts as medicine to lower high cholesterol.

How does it work?

Macadamia nuts contain monounsaturated fatty acids (MUFA) and plant substances that might lower cholesterol.


Uses & Effectiveness?

Possibly Effective for

  • High cholesterol. Eating macadamia nuts as part of a healthy diet seems to lower total and low-density lipoprotein (LDL, or "bad") cholesterol, especially when other fats in the diet are low. People with high cholesterol who eat 17-37 macadamia nuts per day for four weeks can see their total and LDL cholesterol drop by up to 9%.

Insufficient Evidence for

  • Heart disease. Eating 1.5 ounces of macadamia nuts per day as part of a low-fat, low-cholesterol diet may help prevent heart disease. But research is limited.
More evidence is needed to rate macadamia nut for this use.
Side Effects

Side Effects & Safety

When taken by mouth: Macadamia nuts are LIKELY SAFE when eaten as food. They are POSSIBLY SAFE for most people when used as medicine. Some people are allergic to macadamia nuts, but this is rare.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Macadamia nuts are LIKELY SAFE when eaten as food. There isn't enough reliable information to know if macadamia nut is safe to use in larger medicinal amounts when pregnant or breast-feeding. Stay on the safe side and avoid use of amounts larger than what is found in food.

Peanut allergy: People with peanut allergies are more likely to be allergic to nuts called "tree nuts." Macadamia nut is a tree nut. Doctors often advise people with peanut allergies to avoid eating tree nuts. However, very few people with a peanut allergy also have an allergy to macadamia nut. Ask your doctor to test if you are allergic to macadamia nut.

Tree nut allergy: People with allergies to nuts called "tree nuts" are more likely to be allergic to other tree nuts, such as macadamia nut. Doctors often advise people with a tree nut allergy to avoid eating other tree nuts. People with allergy to macadamia nut are more likely to be allergic to coconut and hazelnut. If you are allergic to macadamia nut, avoid foods containing coconut or hazelnut unless you know that you are not allergic to them.



We currently have no information for MACADAMIA NUT Interactions.



The following doses have been studied in scientific research:


  • For high cholesterol: 40 to 90 grams (about 17 to 37 macadamia nuts) per day.
  • Last: Text

View References


  • Moodley, R., Kindness, A., and Jonnalagadda, S. B. Elemental composition and chemical characteristics of five edible nuts (almond, Brazil, pecan, macadamia and walnut) consumed in Southern Africa. J Environ.Sci.Health B 2007;42(5):585-591. View abstract.
  • Curb JD, Wergowske G, Dobbs JC, et al. Serum lipid effects of a high-monounsaturated fat diet based on macadamia nuts. Arch Intern Med 2000;160:1154-8. View abstract.
  • De Knop KJ, Hagendorens MM, Bridts CH, Stevens WJ, Ebo DG. Macadamia nut allergy: 2 case reports and a review of the literature. Acta Clin Belg. 2010;65(2):129-32. View abstract.
  • Ekbote A, Hayman G, Bansal A. Macadamia nut allergy: potentially misleading specific IgE results. Allergy. 2010;65(10):1345. View abstract.
  • FDA. RE: Petition for a Qualified Health Claim for Macadamia Nuts and Reduced Risk of Coronary Heart Disease (Docket No. FDA-2015-Q-4850). July 2017 . Available at: Accessed on March 6, 2020.
  • Garg ML, Blake RJ, Wills RB. Macadamia nut consumption lowers plasma total and LDL cholesterol levels in hypercholesterolemic men. J Nutr 2003;133:1060-3. View abstract.
  • Garg ML, Blake RJ, Wills RBH, Clayton EH. Macadamia nut consumption modulates favourably risk factors for coronary artery disease in hypercholesterolemic subjects. Lipids. 2007;42(6):583-7. View abstract.
  • Griel AE, Cao Y, Bagshaw DD, Cifelli AM, Holub B, Kris-Etherton PM. A macadamia nut-rich diet reduces total and LDL-cholesterol in mildly hypercholesterolemic men and women. J Nutr. 2008;138(4):761-7. View abstract.
  • Herbst RA, Wahl R, Frosch PJ. Specific IgE reactivity and identification of potential allergens in macadamia allergy. J Eur Acad Dermatol Venereol. 2010;24(11):1361-3. View abstract.
  • Knight TE, Hausen BM. Dermatitis in a nutshell: occupational exposure to Macadamia integrifolia. J Am Acad Dermatol 1996;35:482-4.
  • Lerch M, Egger C, Bircher AJ. Allergic reactions to macadamia nut. Allergy 2005;60:130-1.
  • Pallares DE. Allergy to macadamia nut. Ann Allergy Asthma Immunol 2000;85:385-6. View abstract.
  • Polk BI, Dinakarpandian D, Nanda M, Barnes C, Dinakar C. Association of tree nut and coconut sensitizations. Ann Allergy Asthma Immunol. 2016;117(4):412-416. View abstract.
  • Randhawa I, Morphew T, Marsteller NL. Correlation of negative skin-prick test results for tree nuts and successful tree nut challenges among children with peanut allergy. Allergy Asthma Proc. 2018;39(6):456-460. View abstract.
  • Teuber SS, Brown RL, Haapanen LA. Allergenicity of gourmet nut oils processed by different methods. J Allergy Clin Immunol 1997;99:502-7. View abstract.

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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

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