U.S. study shows switch to organic diet can quickly clear pesticide from our bodies

Print Email Share Tweet

A new study published Tuesday found that after switching to an organic diet for just a few days, people could cut the levels of a pesticide linked to cancer found in their urine by more than 70 percent.

The researchers collected a total of 158 urine samples from four families –seven adults and nine children – and examined the samples for the presence of the weed killer glyphosate, which is the active ingredient in Roundup and other popular herbicides. The participants spent five days on a completely non-organic diet and five days on a completely organic diet.

“This study demonstrates that shifting to an organic diet is an effective way to reduce body burden of glyphosate… This research adds to a growing body of literature indicating that an organic diet may reduce exposure to a range of pesticides in children and adults,” states the study, which was published in the journal Environmental Research.

Notably, the researchers found that the children in the study had much higher levels of glyphosate in their urine than did the adults. Both adults and children saw large drops in the presence of the pesticide following the diet change. The mean urinary glyphosate levels for all subjects dropped 70.93 percent.

Despite its small size, the study is an important one because it shows people can markedly reduce their exposures to pesticides in food even without regulatory action, said Bruce Lanphear, Professor of Health Sciences at Simon Fraser University.

Lanphear noted that the study showed children appear to be more heavily exposed than adults, though the reason is unclear.  “If the food is contaminated with pesticides, they will have a higher body burden,” Lanphear said.

Roundup and other glyphosate herbicides are commonly sprayed directly over the top of growing fields of corn, soybeans, sugar beets, canola, wheat, oats and many other crops used to make food, leaving traces in finished food products consumed by people and animals.

The Food and Drug Administration has found glyphosate even in oatmeal  and honey, among other products. And consumer groups have documents glyphosate residues in an array of snacks and cereals.

But glyphosate and glyphosate-based herbicides such as Roundup have been linked to cancer and other illness and disease in several studies over the years and growing awareness of the research has led to growing fears about exposure to the pesticide through the diet.

Many groups have documented the presence of glyphosate in human urine in recent years. But there have been few studies comparing glyphosate levels in people eating a conventional diet versus a diet made up only of foods grown organically, without the use of pesticides such as glyphosate.

“The outcomes of this research validate the previous research in which organic diets could minimize the intakes of agrochemicals, such as glyphosate,” said Chensheng Lu, adjunct professor of the University of Washington School of Public Health and honorary professor, Southwest University, Chongqing China.

“In my opinion, the underlying message of this paper is to encourage producing more organic foods for people who want to protect themselves from the exposure of agrochemicals. This paper has proven again this absolute right pathway for prevention and protection,” Lu said.

The study was authored by John Fagan and Larry Bohlen, both of the Health Research Institute in Iowa, along with Sharyle Patton, director of the Commonweal Biomonitoring Resource Center in California and Kendra Klein, a staff scientist at Friends of the Earth, a consumer advocacy group.

The families participating in the study live in Oakland, California, Minneapolis, Minnesota, Baltimore, Maryland and Atlanta, Georgia.

The study is the second of a two-part research project. In the first, levels of 14 different pesticides were measured in the urine of participants.

Glyphosate is of particular concern because it is the most widely used herbicide in the world and is sprayed on so many food crops. The International Agency for Research on Cancer, part of the World Health Organization, said in 2015 that researched showed glyphosate to be a probable human carcinogen.

Tens of thousands of people have sued Monsanto claiming exposure to Roundup caused them to develop non-Hodgkin lymphoma, and many countries and localities around the world have recently limited or banned glyphosate herbicides or are considering doing so.

Bayer, which bought Monsanto in 2018, is attempting to settle more than 100,000 such claims brought in the United States. The plaintiffs in the nationwide litigation also claim Monsanto has long sought to hide the risks of its herbicides.

A California appeals court ruled last month that there was “abundant” evidence that glyphosate, together with the other ingredients in Roundup products, caused cancer.

More Bad News for Honey as U.S. Seeks to Get Handle on Glyphosate Residues in Foods

Print Email Share Tweet

Testing for residues of an herbicide developed by Monsanto Co. that has been linked to cancer has turned up high levels in honey from the key farm state of Iowa, adding to concerns about herbicide contamination that have triggered at least two lawsuits against honey industry players and prompted scrutiny by regulators.

The Food and Drug Administration began glyphosate residue testing in a small number of foods earlier this year after the International Agency for Research on Cancer classified glyphosate as a probable human carcinogen in March 2015. The “special assignment,” as the FDA refers to the testing project, is the first time the FDA has ever looked for glyphosate residues in food, though it annually tests foods for numerous other pesticides.

Research by FDA chemist Narong Chamkasem and John Vargo, a chemist at the University of Iowa, shows that residues of glyphosate – the chief ingredient in Monsanto’s branded Roundup herbicide – have been detected at 653 parts per billion, more than 10 times the limit of 50 ppb allowed in the European Union. Other samples tested detected glyphosate residues in honey samples at levels from the low 20s ppb to over 123 parts per billion ppb. Some samples had none or only trace amounts below levels of quantification. Previous reports had disclosed glyphosate residues in honey detected as high as 107 ppb. The collaborative work was part of an effort within FDA to establish and validate testing methodology for glyphosate residues.

“According to recent reports, there has been a dramatic increase in the usage of these herbicides, which are of risk to both human health and the environment,” Chamkasem and Vargo stated in their laboratory bulletin.

Because there is no legal tolerance level for glyphosate in honey in the United States, any amount could technically be considered a violation, according to statements made in FDA internal emails, obtained through Freedom of Information Act (FOIA) requests.

The Environmental Protection Agency may soon move to set a tolerance, however. The agency has set tolerance levels for glyphosate residues in many foods the EPA expects might contain residues of the weed killer. When residue levels are detected above the tolerance levels, enforcement action can be taken against the food producer.

“EPA is evaluating the necessity of establishing tolerances for inadvertent residues of pesticides in honey,” the agency said in a statement. The EPA also said there was no reason for consumers to be concerned about the residue in honey.  “EPA has examined the glyphosate residue levels found in honey and has determined that glyphosate residues at those levels do not raise a concern for consumers,” the agency said.

Despite the reassurances, at least two lawsuits have been filed over the issue. The Organic Consumers Association and the Beyond Pesticides nonprofit group filed suit Nov. 1 against the Sioux Honey Association Cooperative, a large Iowa-based group of bee keepers who produce the nationally known brand Sue Bee Honey. Sue Bee bills itself as “America’s Honey,” but the lawsuit alleges that the labeling and advertising of Sue Bee Products as “Pure,” “100% Pure,” “Natural,” and “All-natural” is “false, misleading, and deceptive.” Some of the glyphosate residues detected in the FDA tests were found in the Sue Bee brand, according to the FDA documents obtained through FOIA requests

The claims are similar to another lawsuit, which seeks class action status, that was filed against Sioux Honey Association in late September in U.S. District Court for the Eastern District of New York.

Quaker Oats was sued earlier this year on a similar claim regarding glyphosate residues. The FDA has also found glyphosate residues in oatmeal, including several types of infant oat cereal.

Considering corn is the key crop grown in Iowa, and most of the U.S. corn crop is genetically modified to tolerate being sprayed directly with glyphosate, it is not necessarily surprising that glyphosate residues are showing up in honey in Iowa and other farm states. Honey bees naturally migrate from field to field and plant to plant, so can become contaminated by the pesticide easily and then transfer pesticide residues to their honey, according to bee industry leaders.

“It’s a chemical intrusion, a chemical trespass into our product,” said Darren Cox, president of the American Honey Producers Association. “We have really no way of controlling it. I don’t see an area for us to put our bees. We can’t put them in the middle of the desert. They need to be able to forage in ag areas. There are no ag areas free of this product.”

Sioux Honey Association President David Allibone said no one from the FDA has communicated with his group about the chemical residues found in honey, and he said he could not discuss the issue further because of the litigation.

The lawsuit filed Tuesday acknowledges the difficulties beekeepers face. They “are often the victims of, and have little recourse against, contamination of their hives caused by pesticide applications in the fields where bees forage,” the lawsuit states.

The glyphosate residues showing up in food are surprising and worrisome, according to dietitian Mitzi Dulan, a nationally known nutrition and wellness expert.

“I think more testing should be done so that we are armed with the knowledge and then we can decide what we want to put into our bodies,” Dulan said. “I do believe in minimizing pesticide exposures whenever possible.”

Jay Feldman, executive director of Beyond Pesticides, a plaintiff in the lawsuit filed Tuesday, said regulators need to do more to address the issue.

“Until U.S. regulatory agencies prohibit Monsanto and other manufacturers of glyphosate from selling pesticides that end up in the food supply, we need to protect consumers by demanding truth and transparency in labeling,” Feldman said.

(Article first appeared in The Huffington Post)