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Gluten-free Diet May Increase Risk of Arsenic, Mercury Exposure

Celiac.com 02/14/2017 - People who eat a gluten-free diet may be at risk for increased exposure to arsenic and mercury - toxic metals that can lead to cardiovascular disease, cancer and neurological effects, according to a report in the journal Epidemiology.

poisonGluten-free diets have become popular in the U.S., although less than 1 percent of Americans have been diagnosed with celiac disease - an out-of-control immune response to gluten, a protein found in wheat, rye and barley.

A gluten-free diet is recommended for people with celiac disease, but others often say they prefer eating gluten-free because it reduces inflammation - a claim that has not been scientifically proven. In 2015, one-quarter of Americans reported eating gluten-free, a 67 percent increase from 2013.

Gluten-free products often contain rice flour as a substitute for wheat. Rice is known to bioaccumulate certain toxic metals, including arsenic and mercury from fertilizers, soil, or water, but little is known about the health effects of diets high in rice content.

Maria Argos, assistant professor of epidemiology in the UIC School of Public Health, and her colleagues looked at data from the National Health and Nutrition Examination Survey searching for a link between gluten-free diet and biomarkers of toxic metals in blood and urine.

They found 73 participants who reported eating a gluten-free diet among the 7,471 who completed the survey, between 2009 and 2014. Participants ranged in age from 6 to 80 years old.

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People who reported eating gluten-free had higher concentrations of arsenic in their urine, and mercury in their blood, than those who did not. The arsenic levels were almost twice as high for people eating a gluten-free diet, and mercury levels were 70 percent higher.

"These results indicate that there could be unintended consequences of eating a gluten-free diet," Argos said. "But until we perform the studies to determine if there are corresponding health consequences that could be related to higher levels of exposure to arsenic and mercury by eating gluten-free, more research is needed before we can determine whether this diet poses a significant health risk."

"In Europe, there are regulations for food-based arsenic exposure, and perhaps that is something we here in the United States need to consider," Argos said. "We regulate levels of arsenic in water, but if rice flour consumption increases the risk for exposure to arsenic, it would make sense to regulate the metal in foods as well."

###

Catherine Bulka of UIC; Matthew Davis of the University of Michigan; Margaret Karagas of Dartmouth University; and Habibul Ahsan of the University of Chicago are co-authors on the paper.

This research was supported by National Institutes of Health grants R01 ES024423, R21 ES024834, R01 CA107431, P42 ES010349 and T32 HL125294.

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Hi Dalek, JMG has it right, any food with wheat, rye or barley is a gluten containing food. In addition, watch out for malt, which is sometimes made from barley. That includes the malt in beers.

Interesting!! I'm going to share that with her dr. I'll have to look into the gluten sensitivity more myself, the main reason we started testing is due to poor growth. As I learned more, I've seen several symptoms that could be explained by celiac. I like feeling informed so I'll know what to talk to the dr about or ask about. I think those are the results we are waiting for still, I couldn't remember the name.

Call your doctor's office and ask them to relay your request to the doctor to amend the test request, they should be able to sort it without an additional meeting and delay. Worth a try anyway I think the Biocard tests TTG IGA and it may give you an indication. Do post your results here as I'm sure others will be interested in its effectiveness. If it's negative however remember that there are several celiac tests for a reason. Some test on one, some on another etc... However my guess is your doctor will dismiss them and want their own testing. That's the usual experience.

Waiting for the EMA, I bet. Keep advocating! this is interesting. If celiac disease is excluded, she might still have a gluten sensitivity. There just is not specific test for that. http://theglutensummittranscripts.s3.amazonaws.com/Dr_Umberto_Volta.pdf

I think all the flavors are all gluten free. I buy them at my local grocery store which is a Kroger store. Amazon has them too. Jenny at "The Patient Celiac" uses them too (she is a preemie doctor who has celiac disease).