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Published on September 21st, 2013 | by Tanya Sitton

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New JAMA Study: Arsenic Contaminated Rice Causes Genetic Damage

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Sack of rice with scoop

Researchers in the UK and India published results this week linking arsenic contaminated rice to potentially dangerous genetic changes among consumers.

Authors published study results in the September 18, 2013 edition of the Journal of the American Medical Association. Researchers analyzed data collected from more than 400 people in a rural Indian area. Findings showed that individuals who consumed large quantities of arsenic-tinged rice, in the absence of other known arsenic exposure, showed significant cellular changes linked to cancer development.

Researchers quantified results by measuring amounts of micronuclei — damaged pieces of chromosomes no longer able to participate in cell division — in urine samples of participants. Prior research has shown links between high micronuclei levels and cancer emergence.

As we’ve covered before here at EDB, arsenic-y rice represents one of the disturbing ‘downstream’ effect of modern agricultural methods:

Eighty percent of the rice is grown in the US is from the south central area on lands that were previously sprayed with arsenic pesticide to reduce cotton boll weevils. In addition, arsenic laden manure has been used as fertilizer. The arsenic remains in the soil. Due to the nature of how rice is grown in flooded waters, it sucks up the arsenic from the soil…

‘The arsenic issue affects both organic and conventional rice. 80% of all rice grown in the US comes from areas where arsenic is an issue. However, this takes some legwork to know which rice products are safer than others. The good news is, this problem can be solved. Farmers can make agricultural changes such as not flooding their lands as much and changing the breed of rice they grow which is less sensitive to arsenic.

Mmmm, Arsenic! (Said No One Ever)

If you prefer to season your rice with less toxic substances, there’s good news and there’s bad news to report. The bad news is that the jury’s out on how one might arrange to avoid all rice contaminated with the more toxic inorganic arsenic derived from synthetic agricultural chemistry — other than not eating any rice (or rice starch or rice milk or rice syrup or rice cereal or any foods containing rice derivatives) at all.

The good news is that if you avoid rice that’s been cultivated in traditionally cotton-growing states, you can cut it way way way down! Researchers analyzed 107 samples of rice grown in Louisiana, Mississippi, Texas, Missouri, and Florida, and 27 samples of rice grown in California for a 2007 study of arsenic contamination in rice crops. They found that rice produced in the central and southern US contained arsenic levels almost twice as high as California rice — an average of 4.4 micrograms of arsenic per serving, compared to 2.5 micrograms per serving for rice grown in California. In this study organic brown rice grown in California contained the lowest levels of arsenic contamination, about 1.5 micrograms per serving.

After buying your organic rice from non-cotton states, soak and rinse it until the water runs clear before cooking. And don’t forget all the other grains (or grain-like seeds, or whatever)! Rotate rice with couscous, barley, quinoa, millet, and other grains for minimal food-mediated arsenic exposure.

Meanwhile agitate for a food system that omits the toxification of lovely staple grains like rice, and leaves your mononuclei levels unperturbed.

Image credit: rice photo via Shutterstock.



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About the Author

is an ecovore, veganist, messy chef, green girl, food revolutionary, and general free-thinkin' rabble-rouser. M.S. in a health profession, with strong interests in biology, nutrition, and healthy living - find her on .



  • sam wc

    Thank you for your article. I’ve reduced my brown rice consumption to one meal daily, instead of two to three. Buy only Calif grown rice, rinse until water is clear, soak over night, and cooked the pasta way. I love brown rice.

    • http://www.progressivekitch.com Tanya Sitton

      Thanks for your comment, Sam! … question: what’s ‘the pasta way’? Is there a special cooking method you use for rice to reduce arsenic content, that I didn’t mention? Thanks! #neverstoplearning :)

  • http://North100.com Lo

    Are there any studies/thoughts about rice from Thailand? I don’t have the bag in front of me but it notes that the rice is grown in lush mountains etc.

    • http://www.progressivekitch.com Tanya Sitton

      That’s a good question, and my honest answer is ‘I’m not sure.’ I’ll try to research it further, and report back… good question! If other readers know the answer here: please do chime in. :)

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