What happens when our crops are grown in soil contaminated with arsenic-based pesticides and arsenic drug-laced chicken manure?
Where Does the Arsenic in Rice, Mushrooms, & Wine Come From?
Below is an approximation of this video’s audio content. To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring, watch the above video.
When arsenic-containing drugs are fed to chickens, not only does it grow out into their feathers (which can then be fed back to them as a slaughterhouse byproduct), the arsenic can get into their tissues, and then get into our tissues, explaining why national studies found that those who eat more poultry have tended to have more arsenic flowing through their bodies. Why would the industry do that? “In modern poultry CAFOs [these concentrated animal feeding operations],” there can be “200,000 birds under one roof.” And so, the floors of these buildings become “covered with feces.” While this so-called factory farming “decreases…costs, [this also] increases the risk of disease…” That’s where arsenic-containing drugs, and other antibiotic feed additives, can come in, to try to cut down the spread of disease in such an unnatural environment—to which you can imagine the smug vegetarians gloating how glad they are they don’t eat chicken. But, what do you think happens to the poop?
The arsenic from the drugs in the feed can get into our crops, into the air, and into the groundwater, and find its way into our bodies, whether we eat meat or not. Yeah, but how much arsenic are we really talking about? Well, we raise billions of chickens every year, and if historically, the vast majority were fed arsenic, then, if you do the math, we’re talking about dumping a half million pounds’ worth of pure arsenic into the environment every year—much of it onto our crops, or shoveled directly into the mouths of other farm animals.
Most of the arsenic in chicken waste is water-soluble; so, there are certainly concerns about it seeping into the groundwater. But if it’s used as a fertilizer, what about our food?
Studies on the levels of arsenic in the U.S. food supply dating back to the 70s identified two foods—fish aside—with the highest levels: chicken and rice, both of which can accumulate arsenic in the same way. Deliver an arsenic–containing drug, like roxarsone, to chickens, and it ends up in their manure, which ends up in the soil, which ends up in our pilaf. “Rice is [now] the primary source of [arsenic] exposure in a nonseafood diet.”
I was surprised to see mushrooms in the top five food sources of arsenic, but then, not so surprised when I found out that “poultry litter [was] commonly used” as a starting material to grow mushrooms in the United States. And, over the years, mushroom arsenic content has rivaled the arsenic concentration in rice, though people tend to eat more rice than mushrooms on a daily basis, and arsenic levels in mushrooms did seem to be dipping, starting about a decade ago, confirmed in this latest 2016 paper that looked at a dozen different types of mushrooms: plain white button mushrooms, cremini, portobello, shiitake, trumpet, oyster, nameko (never heard of it), maitake, alba clamshell, brown clamshell (never heard of either of those either), and chanterelle. Now, only averaging about half what rice is running.
Just like some mushrooms have less arsenic than others, some rice has less. Rice grown in California has 40% less arsenic than rice grown in Arkansas, Louisiana, Mississippi, Missouri, and Texas. Why? Well, arsenic-based pesticides had been used more than a century on millions of acres of cotton fields, noted to be “a dangerous practice” back in 1927. Arsenic pesticides are now effectively banned; so, it’s not a matter of buying organic versus conventional rice, because millions of pounds of arsenic had already been laid down in the soil well before your rice was even planted.
The rice industry is well aware of this. There’s an arsenic-toxicity disorder in rice, called “straighthead,” where if you plant rice in soil too heavily contaminated with arsenic, it doesn’t grow right. So, instead of choosing cleaner cropland, they just developed arsenic-resistant strains. So, now, lots of arsenic can build up in rice without the plant getting hurt. Can the same be said, however, for the rice consumer?
Same story with wine. Decade after decade of arsenic pesticide use, and even though they’ve been banned now, arsenic can still be sucked up from the soil, leading to “the pervasive presence of arsenic in [American] wine [which could] “pose a potential health risk.” Curiously, they sum up by saying “[c]hronic arsenic exposure is known to lower IQ in children.” But if kids are drinking that much wine, arsenic toxicity is probably the least of their worries.
Please consider volunteering to help out on the site.
- Yao L, Huang L, He Z, Zhou C, Lu W, Bai C. Delivery of roxarsone via chicken diet→chicken→chicken manure→soil→rice plant. Sci Total Environ. 2016 Oct 1;566-567:1152-8.
- Yang Z, Peng H, Lu X, Liu Q, Huang R, Hu B, Kachanoski G, Zuidhof MJ, Le XC. Arsenic Metabolites, Including N-Acetyl-4-hydroxy-m-arsanilic Acid, in Chicken Litter from a Roxarsone-Feeding Study Involving 1600 Chickens. Environ Sci Technol. 2016 Jul 5;50(13):6737-43.
- Mafla S, Moraga R, León CG, Guzmán-Fierro VG, Yañez J, Smith CT, Mondaca MA, Campos VL. Biodegradation of roxarsone by a bacterial community of underground water and its toxic impact. World J Microbiol Biotechnol. 2015 Aug;31(8):1267-77.
- Nigra AE, Nachman KE, Love DC, Grau-Perez M, Navas-Acien A. Poultry Consumption and Arsenic Exposure in the U.S. Population. Environ Health Perspect. 2017 Mar;125(3):370-377.
- Fisher DJ, Yonkos LT, Staver KW. Environmental concerns of roxarsone in broiler poultry feed and litter in Maryland, USA. Environ Sci Technol. 2015 Feb 17;49(4):1999-2012.
- P Mangalgiri K, Adak A, Blaney L. Organoarsenicals in poultry litter: detection, fate, and toxicity. Environ Int. 2015 Feb;75:68-80.
- Wilson D. Arsenic Content in American Wine. J Environ Health. 2015 Oct;78(3):16-22.
- Seyfferth AL, McClatchy C, Paukett M. Arsenic, Lead, and Cadmium in U.S. Mushrooms and Substrate in Relation to Dietary Exposure. Environ Sci Technol. 2016 Sep 6;50(17):9661-70.
- Williams PN, Raab A, Feldmann J, Meharg AA. Market basket survey shows elevated levels of As in South Central U.S. processed rice compared to California: consequences for human dietary exposure. Environ Sci Technol. 2007 Apr 1;41(7):2178-83.
- Morris HE, Swingle DB. Injury to growing crops caused by the application of arsenical compounds to the soil. Journal Name: J. Agric. Res. (Washington, D.C.); (United States); Journal Volume: 34:1. 1927-01-01.
- Jelinek CF, Corneliussen PE. Levels of arsenic in the United States food supply. Environ Health Perspect. 1977 Aug;19:83-7.
Icons created by Daria Moskvina and Marco Galtarossa from The Noun Project.
Image credit: Lablascovegmenu via Flickr. Image has been modified.
Motion graphics by Avocado Video.
Below is an approximation of this video’s audio content. To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring, watch the above video.
When arsenic-containing drugs are fed to chickens, not only does it grow out into their feathers (which can then be fed back to them as a slaughterhouse byproduct), the arsenic can get into their tissues, and then get into our tissues, explaining why national studies found that those who eat more poultry have tended to have more arsenic flowing through their bodies. Why would the industry do that? “In modern poultry CAFOs [these concentrated animal feeding operations],” there can be “200,000 birds under one roof.” And so, the floors of these buildings become “covered with feces.” While this so-called factory farming “decreases…costs, [this also] increases the risk of disease…” That’s where arsenic-containing drugs, and other antibiotic feed additives, can come in, to try to cut down the spread of disease in such an unnatural environment—to which you can imagine the smug vegetarians gloating how glad they are they don’t eat chicken. But, what do you think happens to the poop?
The arsenic from the drugs in the feed can get into our crops, into the air, and into the groundwater, and find its way into our bodies, whether we eat meat or not. Yeah, but how much arsenic are we really talking about? Well, we raise billions of chickens every year, and if historically, the vast majority were fed arsenic, then, if you do the math, we’re talking about dumping a half million pounds’ worth of pure arsenic into the environment every year—much of it onto our crops, or shoveled directly into the mouths of other farm animals.
Most of the arsenic in chicken waste is water-soluble; so, there are certainly concerns about it seeping into the groundwater. But if it’s used as a fertilizer, what about our food?
Studies on the levels of arsenic in the U.S. food supply dating back to the 70s identified two foods—fish aside—with the highest levels: chicken and rice, both of which can accumulate arsenic in the same way. Deliver an arsenic–containing drug, like roxarsone, to chickens, and it ends up in their manure, which ends up in the soil, which ends up in our pilaf. “Rice is [now] the primary source of [arsenic] exposure in a nonseafood diet.”
I was surprised to see mushrooms in the top five food sources of arsenic, but then, not so surprised when I found out that “poultry litter [was] commonly used” as a starting material to grow mushrooms in the United States. And, over the years, mushroom arsenic content has rivaled the arsenic concentration in rice, though people tend to eat more rice than mushrooms on a daily basis, and arsenic levels in mushrooms did seem to be dipping, starting about a decade ago, confirmed in this latest 2016 paper that looked at a dozen different types of mushrooms: plain white button mushrooms, cremini, portobello, shiitake, trumpet, oyster, nameko (never heard of it), maitake, alba clamshell, brown clamshell (never heard of either of those either), and chanterelle. Now, only averaging about half what rice is running.
Just like some mushrooms have less arsenic than others, some rice has less. Rice grown in California has 40% less arsenic than rice grown in Arkansas, Louisiana, Mississippi, Missouri, and Texas. Why? Well, arsenic-based pesticides had been used more than a century on millions of acres of cotton fields, noted to be “a dangerous practice” back in 1927. Arsenic pesticides are now effectively banned; so, it’s not a matter of buying organic versus conventional rice, because millions of pounds of arsenic had already been laid down in the soil well before your rice was even planted.
The rice industry is well aware of this. There’s an arsenic-toxicity disorder in rice, called “straighthead,” where if you plant rice in soil too heavily contaminated with arsenic, it doesn’t grow right. So, instead of choosing cleaner cropland, they just developed arsenic-resistant strains. So, now, lots of arsenic can build up in rice without the plant getting hurt. Can the same be said, however, for the rice consumer?
Same story with wine. Decade after decade of arsenic pesticide use, and even though they’ve been banned now, arsenic can still be sucked up from the soil, leading to “the pervasive presence of arsenic in [American] wine [which could] “pose a potential health risk.” Curiously, they sum up by saying “[c]hronic arsenic exposure is known to lower IQ in children.” But if kids are drinking that much wine, arsenic toxicity is probably the least of their worries.
Please consider volunteering to help out on the site.
- Yao L, Huang L, He Z, Zhou C, Lu W, Bai C. Delivery of roxarsone via chicken diet→chicken→chicken manure→soil→rice plant. Sci Total Environ. 2016 Oct 1;566-567:1152-8.
- Yang Z, Peng H, Lu X, Liu Q, Huang R, Hu B, Kachanoski G, Zuidhof MJ, Le XC. Arsenic Metabolites, Including N-Acetyl-4-hydroxy-m-arsanilic Acid, in Chicken Litter from a Roxarsone-Feeding Study Involving 1600 Chickens. Environ Sci Technol. 2016 Jul 5;50(13):6737-43.
- Mafla S, Moraga R, León CG, Guzmán-Fierro VG, Yañez J, Smith CT, Mondaca MA, Campos VL. Biodegradation of roxarsone by a bacterial community of underground water and its toxic impact. World J Microbiol Biotechnol. 2015 Aug;31(8):1267-77.
- Nigra AE, Nachman KE, Love DC, Grau-Perez M, Navas-Acien A. Poultry Consumption and Arsenic Exposure in the U.S. Population. Environ Health Perspect. 2017 Mar;125(3):370-377.
- Fisher DJ, Yonkos LT, Staver KW. Environmental concerns of roxarsone in broiler poultry feed and litter in Maryland, USA. Environ Sci Technol. 2015 Feb 17;49(4):1999-2012.
- P Mangalgiri K, Adak A, Blaney L. Organoarsenicals in poultry litter: detection, fate, and toxicity. Environ Int. 2015 Feb;75:68-80.
- Wilson D. Arsenic Content in American Wine. J Environ Health. 2015 Oct;78(3):16-22.
- Seyfferth AL, McClatchy C, Paukett M. Arsenic, Lead, and Cadmium in U.S. Mushrooms and Substrate in Relation to Dietary Exposure. Environ Sci Technol. 2016 Sep 6;50(17):9661-70.
- Williams PN, Raab A, Feldmann J, Meharg AA. Market basket survey shows elevated levels of As in South Central U.S. processed rice compared to California: consequences for human dietary exposure. Environ Sci Technol. 2007 Apr 1;41(7):2178-83.
- Morris HE, Swingle DB. Injury to growing crops caused by the application of arsenical compounds to the soil. Journal Name: J. Agric. Res. (Washington, D.C.); (United States); Journal Volume: 34:1. 1927-01-01.
- Jelinek CF, Corneliussen PE. Levels of arsenic in the United States food supply. Environ Health Perspect. 1977 Aug;19:83-7.
Icons created by Daria Moskvina and Marco Galtarossa from The Noun Project.
Image credit: Lablascovegmenu via Flickr. Image has been modified.
Motion graphics by Avocado Video.
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Where Does the Arsenic in Rice, Mushrooms, & Wine Come From?
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Content URLDoctor's Note
Hold on. Chickens are being fed arsenic-based drugs? See Where Does the Arsenic in Chicken Come From? to find out more.
I expect the arsenic-in-rice issue brought up a lot of questions, and giving you answers is exactly why I’m here! Check out:
- The Effects of Too Much Arsenic in the Diet
- Cancer Risk from Arsenic in Rice and Seaweed
- Which Rice Has Less Arsenic: Black, Brown, Red, White, or Wild?
- Which Brands and Sources of Rice Have the Least Arsenic?
- How to Cook Rice to Lower Arsenic Levels
- Arsenic in Infant Rice Cereal
- Arsenic in Rice Milk, Rice Krispies, and Brown Rice Syrup
- How Risky Is the Arsenic in Rice?
- How Much Arsenic in Rice Is Too Much?
- Is White Rice a Yellow-Light or Red-Light Food?
- Do the Pros of Brown Rice Outweigh the Cons of Arsenic?
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