A groundbreaking peer-reviewed study published today in the journal Environmental Research found that switching to an organic diet significantly reduced the levels of synthetic pesticides found in all participants – after less than one week. On average, the pesticide and pesticide metabolite levels detected dropped by 60.5% after just six days of eating an all-organic diet.
The study, Organic Diet Intervention Significantly Reduces Urinary Pesticide Levels in U.S. Children and Adults, found significant reductions in pesticides that have been associated with increased risk of autism, cancers, autoimmune disorders, infertility, hormone disruption, and Alzheimer’s and Parkinson’s diseases. The most significant declines involved organophosphates, a class of highly neurotoxic pesticides linked to brain damage in children: the study found a 95% drop in levels of malathion and a nearly two thirds reduction in chlorpyrifos. Organophosphates are so toxic to children’s developing brains that scientists have recommended a full ban.
“This study shows that organic works,” said study co-author Kendra Klein, PhD, senior staff scientist at Friends of the Earth. “We all have the right to food that is free of toxic pesticides. Farmers and farmworkers growing our nation’s food and the rural communities they live in have a right not to be exposed to chemicals linked to cancer, autism and infertility. And the way we grow food should protect, not harm, our environment. We urgently need our elected leaders to support our farmers in making healthy organic food available for all.”
“It is vitally important to get as much data as possible regarding what pesticides we are all exposed to and how we can reduce our exposure to these toxic chemicals. The Detox Project is pleased to have made the laboratory connection for FOE to be able to carry out this groundbreaking study with one of the best bio-monitoring laboratories in the U.S.,” Henry Rowlands, Director, The Detox Project.
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The study tested the urine of four diverse American families in Oakland, Minneapolis, Atlanta, and Baltimore after eating their typical diet of conventional food for six days and then after a controlled diet of all organic food for six days.
Key findings of the study include:
- 61% drop in chlorpyrifos, a neurotoxic pesticide known to damage children’s developing brains. Exposure is associated with increased risk of autism, learning disabilities, ADHD, and IQ loss.
- 95% drop in malathion, another neurotoxic organophosphate pesticide and a probable human carcinogen according to the World Health Organization.
- 83% drop in clothianidin, a neonicotinoid pesticide. Neonicotinoids are associated with endocrine disruption and changes in behavior and attention, including an association with autism spectrum disorder. Neonicotinoids are also a main driver of massive pollinator and insect losses, leading scientist to warn of a “second silent spring.”
- 43-57% drop in pyrethroids, a class of pesticides associated with endocrine disruption and adverse neurodevelopmental, immunological and reproductive effects.
- 37% drop in 2,4-D, one of two ingredients in Agent Orange. 2,4-D is among the top five most commonly used pesticides in the U.S. and is associated with endocrine disruption, thyroid disorders, increased risk of Parkinson’s and non-Hodgkin’s lymphoma, developmental and reproductive toxicity and other health issues.
The U.S. Environmental Protection Agency (EPA) under President Trump has ignored the clear science behind the danger of organophosphate pesticides and reversed the EPA’s proposed ban on chlorpyrifos in 2017. Friends of the Earth is calling on Congress to take immediate action to pass a bill recently introduced by Rep. Velazquez (H.R. 230) to ban chlorpyrifos.
“This important study shows how quickly we can rid our bodies of toxic pesticides by choosing organic,” said Sharyle Patton, Director of the Commonweal Biomonitoring Resources Center and co-author of the study. “Congratulations to the families who participated in the study and their willingness to tell their stories in support of creating a food system where organic is available to all.”
For more information: www.OrganicforAll.org
Hyland, Carly1, Asa Bradman1, Roy Gerona2, Sharyle Patton3, Igor Zakharevich2, Robert B. Gunier1, Kendra Klein4 (2019). Organic Diet Intervention Significantly Reduces Urinary Pesticide Levels in U.S. Children and Adults. Environmental Research.
Author affiliations
1Center for Environmental Research and Children’s Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, California, United States
2Clinical Toxicology and Environmental Biomonitoring Laboratory, University of California at San Francisco, San Francisco, California, USA.
3Commonweal Institute, Bolinas, CA
4Friends of the Earth U.S.
(5 votes, average: 5.00 out of 5)
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