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Nuts and Heart HealthA FACTSHEET FOR CLIENTS AND PATIENTS

Enjoying a handful of nuts every day can reduce your risk of developing cardiovascular disease by more than 20% and coronary heart disease by nearly 30%[1]. And if you have heart disease, eating nuts can reduce your risk of dying from it[1].

Regularly eating nuts can also significantly reduce total cholesterol, LDL (bad) cholesterol and improve the ratio of bad to good cholesterol, which are all risk factors for heart disease[2].

How many nuts do I need to eat?

A 30g serve (about one handful) of nuts 2–5 times a week supports heart health, and around two handfuls (60g) each day lowers cholesterol.

Which nuts are best?

All nuts have a similar effect on heart health so enjoy a variety of nuts everyday. However, we know Australians eat too much salt (which can increase blood pressure), so it’s best to enjoy raw or roasted, unsalted nuts as your everyday choice, saving salted nuts for special occasions.

How do nuts support heart health?

  • Nuts have a high proportion of healthy, mono- and polyunsaturated fats, and lower unhealthy saturated fats. A diet high in saturated and trans-fat is associated with higher cholesterol levels[3].

  • Nuts contain phytosterols, which help reduce cholesterol in the blood by reducing the amount that the body absorbs, and removing it from the body instead[4, 5].
  • Arginine, an essential amino acid, helps blood vessels remain flexible and prevent blood clots[6].
  • Vitamin E, riboflavin, selenium, manganese, copper, zinc and polyphenols are all found in nuts. These act as antioxidants, which help protect your body’s cells from damage caused by oxidation[7–9].
  • The fibre and soluble fibre found in nuts helps reduce blood cholesterol by lowering cholesterol re-absorption from the intestine[10].

What does all this mean?

Regularly eating nuts can reduce your risk of developing heart disease or dying from heart disease if you already have it.

To put it simply, eating nuts is good for a healthy heart.

In addition to supporting heart health, there is also strong evidence for nuts in reducing the risk of diabetes[11], overweight and obesity[12], supporting brain health and reducing the risk of cancer[13].

References

  • Aune, D., et al., Nut consumption and risk of cardiovascular disease, total cancer, all-cause and cause-specific mortality: a systematic review and
    dose-response meta-analysis of prospective studies. BMC Med, 2016. 14(1): p. 207.
  • Neale, E., et al., The effect of nut consumption on heart health: an updated systematic review of the literature. 2018. Nuts for Life, unpublished.
  • Mensink, R., Effects of saturated fatty acids on serum lipids and lipoproteins: a systematic review and regression analysis. Geneva: World Health
    Organization. 2016.
  • Racette, S.B., et al., Dose effects of dietary phytosterols on cholesterol metabolism: a controlled feeding study. The American Journal of Clinical
    Nutrition, 2010. 91(1): p. 32-38.
  • Rocha, M., et al., A review on the role of phytosterols: new insights into cardiovascular risk. Current Pharmaceutical Design, 2011. 17(36):
    p. 4061-4075.
  • Neale, E.P., et al., The effect of nut consumption on markers of inflammation and endothelial function: a systematic review and meta-analysis of
    randomised controlled trials. BMJ Open, 2017. 7(11): p. e016863.
  • Lopez-Uriarte, P., et al., Nuts and oxidation: a systematic review. Nutr Rev, 2009. 67(9): p. 497-508
  • Olas, B. and B. Wachowicz, Resveratrol, a phenolic antioxidant with effects on blood platelet functions. Platelets, 2005. 16(5): p. 251-60
  • Bullo, M., R. Lamuela-Raventos, and J. Salas-Salvado, Mediterranean diet and oxidation: nuts and olive oil as important sources of fat and
    antioxidants. Curr Top Med Chem, 2011. 11(14): p. 1797-810.
  • Surampudi, P., et al., Lipid Lowering with Soluble Dietary Fiber. Curr Atheroscler Rep, 2016. 18(12): p. 75
  • Afshin, A., et al., Consumption of nuts and legumes and risk of incident ischemic heart disease, stroke, and diabetes: a systematic review and
    meta-analysis. Am J Clin Nutr, 2014. 100(1): p. 278-88
  • Li, H., et al., Nut consumption and risk of metabolic syndrome and overweight/obesity: a meta-analysis of prospective cohort studies and randomized
    trials. Nutr Metab (Lond), 2018. 15: p. 46.
  • Wu, L., et al., Nut consumption and risk of cancer and type 2 diabetes: a systematic review and meta-analysis. Nutr Rev, 2015. 73(7): p. 409-25.
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