“Previous studies have shown that both food allergies and environmental pollution are increasing in the United States,” study author Dr. Elina Jerschow, an assistant professor of allergy and immunology at the Albert Einstein College of Medicine in New York City, said in a press release. “The results of our study suggest these two trends might be linked, and that increased use of pesticides and other chemicals is associated with a higher prevalence of food allergies.”
Researchers analyzed more than 10,000 Americans who were part of an ongoing U.S. survey of health and nutrition. They analyzed their urine levels and found more than 2,200 patients had measurable levels of dichlorophenols in their urine. That’s a chemical used in pesticides and weedkillers, which is also used to chlorinate drinking water.
The researchers reported of those with measurable levels of dichlorophenols, 411 people had a food allergy and more than 1,000 had an environmental allergy, such as to pollen. People with the highest levels of the chemicals in their urine were more likely to have an allergy than those with the lower levels.
“The immune system begins developing in fetuses and continues its development through childhood,” said Spaeth. “Therefore, it is plausible that exposure to these pesticides during this development could alter the immune system in ways that could increase the risk of allergies. Until further studies are done, no conclusions can be drawn but there is enough evidence for concern and certainly to further examine the issue.”
