A Brazil nut a day helps keep selenium deficiency away

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Complementary Health

A Brazil nut a day helps keep selenium deficiency away

November 2019

Shaun Holt

Friday 1 November 2019, 01:00 AM

Brazil nuts can cause selenium toxicity if a lot are eaten regularly

Selenium is an essential trace element present in more than 20 critical proteins, yet the consequences of low levels are not well understood. Complementary medicines expert Shaun Holt discusses selenium and areas where supplementation may improve health

Many pharmacy customers ask about selenium supplements because concentrations in New Zealand soils are low and therefore so are the levels in our food

Education

Complementary Health

References

Medsafe. Selenium. Prescriber Update 2000;20:39-42.
University of Otago and Ministry of Health. A focus on nutrition: Key findings of the 2008/09 New Zealand Adult Nutrition Survey. Wellington: Ministry of Health: 2011.
Sunde RA. Selenium. In Ross AC, Caballero B, Cousins RJ, et al (Eds), Modern Nutrition in Health and Disease (11th ed) [pp. 225–37]. Philadelphia, PA: Lippincott Williams & Wilkins; 2012.
Dennert G, Zwahlen M, Brinkman M, et al. Selenium for preventing cancer. Cochrane Database Syst Rev 2011:CD005195.
Bjelakovic G, Nikolova D, Simonetti RG, et al. Systematic review: Primary and secondary prevention of gastrointestinal cancers with antioxidant supplements. Aliment Pharmacol Ther 2008;28:689–703.
Rayman MP, Stranges S, Griffin BA, et al. Effect of supplementation with high-selenium yeast on plasma lipids: A randomized trial. Ann Intern Med 2011;154:656–65.
Rees K, Hartley L, Day C, et al. Selenium supplementation for the primary prevention of cardiovascular disease. Cochrane Database Syst Rev 2013:CD009671.
Kesse-Guyot E, Fezeu L, Jeandel C, et al. French adults’ cognitive performance after daily supplementation with antioxidant vitamins and minerals at nutritional doses: A post hoc analysis of the Supplementation in Vitamins and Mineral Antioxidants (SU.VI.MAX) trial. Am J Clin Nutr 2011;94:892–99.

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A Brazil nut a day helps keep selenium deficiency away