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Can we eat too many Macadamias?


form an important part of a healthy diet. The health benefits of macadamias can not be traced to any single constituent, but to the complex composition and inter-relationships that exist. For an ideal diet they need to be eaten in conjunction with a range of foods. A diet containing macadamias promotes good health, longevity and reduction of degenerative diseases. Health benefits are about reduction of risks.

Research knowledge from other tree nuts is often applicable to macadamias, and most other tree nuts also have proven health benefits. Tree nuts are an ancient food and the Mediterranean Diet Pyramid recommends them to be eaten daily.

Dietary studies with tree nuts including macadamia trials have shown reduction of risk areas such as:

  • Cardio-vascular Diseases
  • Anti-inflammatory Diseases
  • Anti-aggregatory Diseases
  • Immuno Modulating Systems Current Australian Macadamia Society research projects are:

firstly a dietary trial to measure reduction of risk of heart disease, diabetes, rheumatoid arthritis, hypertension, cancers and related diseases, a project to determine the antioxidant present and their activity; secondly a project to investigate the effect of macadamias in protecting the brachial arterial walls, which are associated with a reduction of arteriosclerosis. Macadamias are not genetically modified and only contains natural genes.

Benefits of Nut Consumption on Insulin Resistance and Cardiovascular Risk Factors: Multiple Potential Mechanisms of Actions

Yoona Kim, Jennifer B. Keogh and Peter M. Clifton *

Received: 15 September 2017 / Accepted: 14 November 2017 / Published: 22 November 2017


Epidemiological and clinical studies have indicated that nut consumption could be a healthy dietary strategy to prevent and treat type 2 diabetes (T2DM) and related cardiovascular disease (CVD). The objective of this review is to examine the potential mechanisms of action of nuts addressing effects on glycemic control, weight management, energy balance, appetite, gut microbiota modification, lipid metabolism, oxidative stress, inflammation, endothelial function and blood pressure with a focus on data from both animal and human studies. The favourable effects of nuts could be explained by the unique nutrient composition and bioactive compounds in nuts. Unsaturated fatty acids (monounsaturated fatty acids and polyunsaturated fatty acids) present in nuts may play a role in glucose control and appetite suppression. Fiber and polyphenols in nuts may also have an anti-diabetic effect by altering gut microbiota. Nuts lower serum cholesterol by reduced cholesterol absorption, inhibition of HMG-CoA reductase and increased bile acid production by stimulation of 7-α hydroxylase. Arginine and magnesium improve inflammation, oxidative stress, endothelial function and blood pressure. In conclusion, nuts contain compounds that favourably influence glucose homeostasis, weight control and vascular health. Further investigations are required to identify the most important mechanisms by which nuts decrease the risk of T2DM and CVD.
Keywords: nuts; type 2 diabetes mellitus; cardiovascular disease

INC-Funded Study Reinforces that Nuts May Help Improve Endothelial Function

November 2017. Research and knowledge on the effects of nut consumption on human health has increased in recent years, suggesting that nut consumption may play a key role in the prevention of chronic diseases, such as diabetes and cardiovascular disease (CVD), among others.


Some chronic diseases are accompanied by a state of low-grade of inflammation which influences the progression and development of the disease. Changes in this inflammatory state can be identified via inflammatory biomarkers, for example C-reactive protein. Endothelial dysfunction is associated with the development of cardiovascular disease. This recent systematic review and meta-analysis, published in BMJ Open journal, examined the effect of nut consumption on inflammatory biomarkers and endothelial function[i].

[i] Neale EP, et al., 2017. The effect of nut consumption on markers of inflammation and endothelial function: a systematic review and meta-analysis of randomised controlled trials. BMJ Open.