A Common Organic Sweetener May Boost Arsenic Levels in Foods
Study Shows Brown Rice Syrup Adds Arsenic to Many Natural, Organic Products
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Arsenic in Foods Made With Brown Rice Syrup
For the study, which is published in the journal Environmental Health Perspectives, researchers analyzed arsenic levels in 17 different brands of formula made for infants and toddlers.
They also tested 29 energy bars, and three energy gels, portable sources of easily digested carbohydrates often used by endurance athletes.
And they checked three organic brown rice syrups, which are sold in the natural or organic sections of some supermarkets. Some people use rice syrup as an alternative to sugar or corn syrup in baked goods and beverages.
Products that didn’t list rice or rice syrups as top ingredients were all low in arsenic.
But the rice syrups themselves, and products that listed rice syrups or rice as one of the first five ingredients, all had high arsenic levels.
Most of the arsenic detected in the bars and energy gels was inorganic arsenic, the kind that’s believed to be the most toxic.
Still, that may not be so concerning, experts say, for foods that are eaten only occasionally. The body can typically clear a single small dose of arsenic in just a few days.
But for food staples, the danger increases.
Arsenic in Baby Formula
Two kinds of organic formula that listed brown rice syrup as their first ingredient, for example, had arsenic levels that were two to five times higher than the limits allowed in drinking water.
“The infant formula is really troubling, concerning,” says Michael Bloom, PhD, an assistant professor in the department of environmental health sciences at the University of Albany, State University of New York, in Rensselaer.
“These children who are fed with formula almost exclusively are getting a very high relative dose of arsenic from these sources,” says Bloom, who studies the health effects of arsenic exposure, but was not involved in the research.
In three of the samples, most of the arsenic that was detected was organic, which has been thought to be less harmful than inorganic arsenic.
But experts say new evidence suggests that the kind of organic arsenic picked up in the study, DMA, is not risk-free.
“The available evidence suggests that it is toxic, too,” says Navas-Acien.
The arsenic levels detected in the formula were still too low to cause immediate illness.
But over the longer term, studies have shown that young children exposed to moderate arsenic levels, over 50 micrograms per liter, are more likely to have lower IQs and reduced brain function compared to kids drinking water with arsenic levels below 5.5 micrograms per liter.
For comparison, three samples of the formula made with brown rice syrup in the study had about 30 micrograms of arsenic per liter. The fourth sample had nearly 60 micrograms of arsenic per liter.
The U.S. EPA says drinking water shouldn’t contain more than 10 micrograms per liter.