Chemicals on Our Food: When “Safe” May Not Really Be Safe

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Scientific scrutiny of pesticide residue in food grows; regulatory protections questioned

This article was originally published in Environmental Health News.

By Carey Gillam

Weed killers in wheat crackers and cereals, insecticides in apple juice and a mix of multiple pesticides in spinach, string beans and other veggies – all are part of the daily diets of many Americans. For decades, federal officials have declared tiny traces of these contaminants to be safe. But a new wave of scientific scrutiny is challenging those assertions.

Though many consumers might not be aware of it, every year, government scientists document how hundreds of chemicals used by farmers on their fields and crops leave residues in widely consumed foods. More than 75 percent of fruits and more than 50 percent of vegetables sampled carried pesticides residues in the latest sampling reported by the Food and Drug Administration. Even residues of the tightly restricted bug-killing chemical DDT are found in food, along with a range of other pesticides known by scientists to be linked to a range of illnesses and disease. The pesticide endosulfan, banned worldwide because of evidence that it can cause neurological and reproductive problems, was also found in food samples, the FDA report said.

U.S. regulators and the companies that sell the chemicals to farmers insist that the pesticide residues pose no threat to human health. Most residue levels found in food fall within legal “tolerance” levels set by the Environmental Protection Agency (EPA), regulators say.

“Americans depend on the FDA to ensure the safety of their families and the foods they eat,” FDA Commissioner Scott Gottlieb said in a press release accompanying the agency’s Oct. 1 release of its residue report. “Like other recent reports, the results show that overall levels of pesticide chemical residues are below the Environmental Protection Agency’s tolerances, and therefore don’t pose a risk to consumers.”

The EPA is so confident that traces of pesticides in food are safe that the agency has granted multiple chemical company requests for increases in the allowed tolerances, effectively providing a legal basis for higher levels of pesticide residues to be allowed in American food.

But recent scientific studies have prompted many scientists to warn that years of promises of safety may be wrong. While no one is expected to drop dead from eating a bowl of cereal containing pesticide residues, repeated low level exposures to trace amounts of pesticides in the diet could be contributing to a range of health problems, particularly for children, scientists say.

“There are probably many other health effects; we just haven’t studied them”

A team of Harvard scientists published a commentary in October stating that more research about potential links between disease and consumption of pesticide residues is “urgently needed” as more than 90 percent of the U.S. population has pesticide residues in their urine and blood. The primary route of exposure to these pesticides is through the food people eat, the Harvard research team said.

Several additional Harvard-affiliated scientists published a study earlier this year of women who were trying to get pregnant. The findings suggested that dietary pesticide exposure within a “typical” range was associated both with problems women had getting pregnant and delivering live babies, the scientists said.

“Clearly the current tolerance levels protect us from acute toxicity. The problem is that it is not clear to what extent long-term low-level exposure to pesticide residues through food may or may not be health hazards,” said Dr. Jorge Chavarro, associate professor of the Departments of Nutrition and Epidemiology at the Harvard T.H. Chan School of Public Health, and one of the study authors.

“Exposure to pesticide residues through diet is associated [with] some reproductive outcomes including semen quality and greater risk of pregnancy loss among women undergoing infertility treatments. There are probably many other health effects; we just haven’t studied them sufficiently to make an adequate risk assessment,” Chavarro said.

Toxicologist Linda Birnbaum, who directs the U.S. National Institute of Environmental Health Sciences (NIEHS), has also raised concerns about pesticide dangers through exposures once assumed to be safe. Last year she called for “an overall reduction in the use of agricultural pesticides” due to multiple concerns for human health, stating that “existing US regulations have not kept pace with scientific advances showing that widely used chemicals cause serious health problems at levels previously assumed to be safe.”

In an interview Birnbaum said that pesticide residues in food and water are among the types of exposures that need greater regulatory scrutiny.

“Do I think that levels that are currently set are safe? Probably not,” said Birnbaum. “We have people of different susceptibility, whether because of their own genetics, or their age, whatever may make them more susceptible to these things,” she said.

“While we look at chemicals one at a time, there is a lot of evidence for things acting in a synergistic fashion. A lot of our standard testing protocols, many that were developed 40 to 50 years ago, are not asking the questions we should be asking,” she added.

Legal doesn’t mean safe

Other recent scientific papers also point to troubling findings. One by a group of international scientists published in May found glyphosate herbicide at doses currently considered “safe” are capable of causing health problems before the onset of puberty. More research is needed to understand potential risks to children, the study authors said.

And in a paper published Oct. 22 in JAMA Internal Medicine, French researchers said that when looking at pesticide residue links to cancer in a study of the diets of more than 68,000 people, they found indications that consumption of organic foods, which are less likely to carry synthetic pesticide residues than foods made with conventionally grown crops, was associated with a reduced risk of cancer.

A 2009 paper published by a Harvard researcher and two FDA scientists found 19 out of 100 food samples that children commonly consumed contained at least one insecticide known to be a neurotoxin. The foods the researchers looked at were fresh vegetables, fruits and juices. Since then, evidence has grown about the harmful human health impacts of insecticides, in particular.

Unacceptable levels

“A number of current legal standards for pesticides in food and water do not fully protect public health, and do not reflect the latest science,” said Olga Naidenko, senior science advisor to the non-profit Environmental Working Group, which has issued several reports looking at potential dangers of pesticides in food and water. “Legal does not necessarily reflect “safe,” she said.

One example of how regulatory assurances of safety have been found lacking when it comes to pesticide residues is the case of an insecticide known as chlorpyrifos. Marketed by Dow Chemical, which became the DowDuPont company in 2017, chlorpyrifos is applied to more than 30 percent of apples, asparagus, walnuts, onions, grapes, broccoli, cherries and cauliflower grown in the U.S. and is commonly found on foods consumed by children. The EPA has said for years that exposures below the legal tolerances it set were nothing to worry about.

Yet scientific research in recent years has demonstrated an association between chlorpyrifos exposure and cognitive deficits in children. The evidence of harm to young developing brains is so strong that the EPA in 2015 said that it “cannot find that any current tolerances are safe.”

The EPA said that because of unacceptable levels of the insecticide in food and drinking water it planned to ban the pesticide from agricultural use. But pressure from Dow and chemical industry lobbyists have kept the chemical in wide use on American farms. The FDA’s recent report found it the 11th most prevalent pesticides in U.S. foods out of hundreds included in the testing.

A federal court in August said that the Trump Administration was endangering public health by keeping chlorpyrifos in use for agricultural food production. The court cited “scientific evidence that its residue on food causes neurodevelopmental damage to children” and ordered the EPA to revoke all tolerances and ban the chemical from the market. The EPA has yet to act on that order, and is seeking a rehearing before the full 9th Circuit Court of Appeals.

When asked how to explain its changing positions on chlorpyrifos, an agency spokesman said that the EPA “plans to continue to review the science addressing neurodevelopmental effects” of the chemical.

The fact that it is still in wide use frustrates and angers physicians who specialize in child health and leaves them wondering what other pesticide exposures in food might be doing to people.

“The bottom line is that the biggest public health concerns for chlorpyrifos are from its presence in foods,” said Dr. Bradley Peterson director of the Institute for the Developing Mind at the Children’s Hospital of Los Angeles. “Even small exposures can potentially have harmful effects.”

The EPA decision to continue to allow chlorpyrifos into American diets is “emblematic of a broader dismissal of scientific evidence” that challenges human health as well as scientific integrity, according to Dr. Leonardo Trasande, who directs the Division of Environmental Pediatrics within the Department of Pediatrics at New York University’s Langone Health.

Epidemiologist Philip Landrigan, director of Boston College’s Global Public Health initiative, and a former scientist with the U.S. Centers for Disease Control, is advocating for a ban on all organophosphates, a class of insecticides that includes chlorpyrifos, because of the danger they pose to children.

“Children are exquisitely vulnerable to these chemicals,” said Landrigan. “This is about protecting kids.”

Increased tolerances at industry request

The Federal Food, Drug, and Cosmetic Act authorizes the EPA to regulate the use of pesticides on foods according to specific statutory standards and grants the EPA a limited authority to establish tolerances for pesticides meeting statutory qualifications.

Tolerances vary from food to food and pesticide to pesticide, so an apple might legally carry more of a certain type of insecticide residue than a plum, for instance. The tolerances also vary from country to country, so what the U.S. sets as a legal tolerance for residues of a pesticide on a particular food can – and often is – much different than limits set in other countries. As part of the setting of those tolerances, regulators examine data showing how much residue persists after a pesticide is used as intended on a crop, and they undertake the dietary risk assessments to confirm that the levels of pesticide residues don’t pose human health concerns.

The agency says that it accounts for the fact that the diets of infants and children may be quite different from those of adults and that they consume more food for their size than adults. The EPA also says it combines information about routes of pesticide exposure – food, drinking water residential uses – with information about the toxicity of each pesticide to determine the potential risks posed by the pesticide residues. The agency says if the risks are “unacceptable,” it will not approve the tolerances.

The EPA also says that when it makes tolerance decisions, it “seeks to harmonize U.S. tolerances with international standards whenever possible, consistent with U.S. food safety standards and agricultural practices.”

Monsanto, which became of unit of Bayer AG earlier this year, has successfully asked the EPA to expand the levels of glyphosate residues allowed in several foods, including in wheat and oats.

In 1993, for example, the EPA had a tolerance for glyphosate in oats at 0.1 parts per million (ppm) but in 1996 Monsanto asked EPA to raise the tolerance to 20 ppm and the EPA did as asked. In 2008, at Monsanto’s suggestion, the EPA again looked to raise the tolerance for glyphosate in oats, this time to 30 ppm.

At that time, it also said it would raise the tolerance for glyphosate in barley from 20 ppm to 30 ppm, raise the tolerance in field corn from 1 to 5 ppm and raise the tolerance of glyphosate residue in wheat from 5 ppm to 30 ppm, a 500 percent increase. The 30 ppm for wheat is matched by more than 60 other countries, but is well above the tolerances allowed in more than 50 countries, according to an international tolerance database established with EPA funding and maintained now by a private government affairs consulting group.

“The Agency has determined that the increased tolerances are safe, i.e, there is a reasonable certainty that no harm will result from aggregate exposure to the pesticide chemical residue,” the EPA stated in the May 21, 2008 Federal Register.

“All these statements from EPA – trust us it’s safe. But the truth is we have no idea if it actually is safe,” said Dr. Bruce Lanphear, a clinician scientist at the Child & Family Research Institute, BC Children’s Hospital, and a professor in the faculty of health sciences at Simon Fraser University in Vancouver, British Columbia. Lanphear said that while regulators assume toxic effects increase with dose, scientific evidence shows that some chemicals are most toxic at the lowest levels of exposure. Protecting public health will require rethinking basic assumptions about how agencies regulate chemicals, he argued in a paper published last year.

In recent years both Monsanto and Dow have received new tolerance levels for the pesticides dicamba and 2,4-D on food as well.

Raising tolerances allows farmers to use pesticides in various ways that may leave more residues, but that doesn’t threaten human health, according to Monsanto. In a blog posted last year, Monsanto scientist Dan Goldstein asserted the safety of pesticide residues in food generally and of glyphosate in particular. Even when they exceed the regulatory legal limits, pesticide residues are so minuscule they pose no danger, according to Goldstein, who posted the blog before he retired from Monsanto this year.

About half of foods sampled contained traces of pesticides

Amid the scientific concerns, the most recent FDA data on pesticide residues in food found that roughly half of the foods the agency sampled contained traces of insecticides, herbicides, fungicides and other toxic chemicals used by farmers in growing hundreds of different foods.

More than 90 percent of apple juices sampled were found to contain pesticides. The FDA also reported that more than 60 percent of cantaloupe carried residues. Overall, 79 percent of American fruits and 52 percent of vegetables contained residues of various pesticides – many known by scientists to be linked to a range of illnesses and disease. Pesticides were also found in soy, corn, oat and wheat products, and finished foods like cereals, crackers and macaroni.

The FDA analysis “almost exclusively” is focused on products that are not labeled as organic, according to FDA spokesman Peter Cassell.

The FDA downplays the percentage of foods containing pesticide residues and focuses on the percentage of samples for which there is no violation of the tolerance levels. In its most recent report, the FDA said that more than “99% of domestic and 90% of import human foods were compliant with federal standards.”

The report marked the agency’s launch of testing for the weed killer glyphosate in foods. The Government Accountability Office said in 2014 that both the FDA and the U.S. Department of Agriculture should start regularly testing foods for glyphosate. The FDA did only limited tests looking for glyphosate residues, however, sampling corn and soy and milk and eggs for the weed killer, the agency said. No residues of glyphosate were found in milk or eggs, but residues were found in 63.1 percent of the corn samples and 67 percent of the soybean samples, according to FDA data.

The agency did not disclose findings by one of its chemists of glyphosate in oatmeal and honey products, even though the FDA chemist made his findings known to supervisors and other scientists outside the agency.

Cassell said the honey and oatmeal findings were not part of the agency’s assignment.

Overall, the new FDA report covered sampling done from Oct. 1, 2015, through Sept. 30, 2016, and included analysis of 7,413 samples of food examined as part of the FDA’s “pesticide monitoring program.” Most of the samples were of food to be eaten by people, but 467 samples were of animal food. The agency said that pesticide residues were found in 47.1 percent of the samples of food for people produced domestically and 49.3 percent of food imported from other countries destined for consumer meals. Animal food products were similar, with pesticide residues found in 57 percent of the domestic samples and 45.3 percent of imported foods for animals.

Many imported food samples showed residues of pesticides high enough to break the legal limits, the FDA said. Nearly 20 percent of imported grain and grain product samples showed illegally high levels of pesticides, for example.

SF Roundup Case Demonstrates Importance of Independence in Scientific Evidence

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This article was originally published in San Francisco Chronicle.

By Nathan Donley and Carey Gillam

It’s been three weeks since a San Francisco jury found that exposure to Monsanto’s Roundup herbicides contributed to former school groundskeeper Dewayne “Lee” Johnson’s terminal cancer and awarded a stunning $289 million in damages to the 46-year-old father. And during that time, we’ve seen repeated assertions from the pesticide giant and its allies that, in fact, the jury was wrong and the weed killer of choice for millions of Americans is perfectly safe.

Monsanto Vice President Scott Partridge repeated the familiar mantra: Hundreds of scientific studies, as well as reviews by regulatory agencies across the globe, including the U.S. Environmental Protection Agency, have found that glyphosate — the active ingredient in Roundup — does not cause cancer. Monsanto’s new owner, Bayer AG, went further. Bayer CEO Werner Baumann told investors that the jury was just flat-out “wrong” and that Bayer would work to ensure that sales of the weed-killing products were not interrupted. “More than 800 scientific studies and reviews” support glyphosate safety, he told investors.

Unchallenged, the carefully honed talking points sound impressive and conclusive — exactly as intended.

But in the wake of the jury’s award, many people across the United States who have been spraying the pesticide on their lawns and gardens for years doubt those reassuring words. And with good reason.

Corporate assurances of safety leave out one important word — a word that is critically important to anyone who wants to make an informed decision about the cancer risk associated with Roundup and the hundreds of other glyphosate-based herbicides on the market.

That word is “independent,” as in “independent scientific studies and reviews.”

As was laid out in the trial, there is a wealth of evidence, much of it from within Monsanto’s own internal documents, detailing how much of the research suggesting that Roundup is safe has been orchestrated and/or influenced by Monsanto and its chemical industry allies.

But truly independent research has shown that there is reason for concern. As Roundup use on U.S. farms, residential lawns and gardens has soared from roughly 40 million pounds a year in the 1990s to nearly 300 million pounds in recent years, the dangers of the chemical have been documented in numerous peer-reviewed studies.

It was those independent and peer-reviewed works that convinced the cancer research arm of the World Health Organization to determine that glyphosate is a probable human carcinogen. In the wake of that WHO finding, California added glyphosate to the state’s list of cancer-causing chemicals.

Monsanto’s response to that 2015 classification was more manipulated science. An “independent review” of glyphosate showed up in a peer-reviewed scientific journal decrying the IARC classification. The review not only was titled as being independent, but declared that no Monsanto employee had any involvement in the writing of it.Yet the company’s internal emails, turned over in discovery associated with the litigation, revealed that a Monsanto scientist in fact aggressively edited and reviewed the analysis prior to its publication.

That was but one of multiple examples detailed in the unsealed documents of similar efforts, referred to by Monsanto’s own employees as “ghostwriting.”

The EPA has sided with Monsanto over independent scientists, declaring the pesticide is not likely to cause cancer. By doing so, the agency has ignored the fact that its own Office of Research and Development expressed unease with the EPA’s handling of the glyphosate evaluation, as did a scientific advisory panel convened by the agency to peer-review the evaluation.

Perhaps not surprisingly, the trial evidence also included communications detailing what can only be described as cozy collaborations between Monsanto and certain EPA officials.

Americans deserve better from their regulators, whose priority should be to put the public’s health far before corporate profits.

Instead, it took a brave man dying of cancer and jury of 12 ordinary citizens to step up and face the challenge of taking a hard look at the scientific facts and calling for justice.

One Man’s Suffering Exposed Monsanto’s Secrets to the World

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Company’s own records revealed damning truth of glyphosate-based herbicides’ link to cancer

This article was originally published in The Guardian.

By Carey Gillam

It was a verdict heard around the world. In a stunning blow to one of the world’s largest seed and chemical companies, jurors in San Francisco have told Monsanto it must pay $289m in damages to a man dying of cancer which he claims was caused by exposure to its herbicides.

Monsanto, which became a unit of Bayer AG in June, has spent decades convincing consumers, farmers, politicians and regulators to ignore mounting evidence linking its glyphosate-based herbicides to cancer and other health problems. The company has employed a range of tactics – some drawn from the same playbook used by the tobacco industry in defending the safety of cigarettes – to suppress and manipulate scientific literature, harass journalists and scientists who did not parrot the company’s propaganda, and arm-twist and collude with regulators. Indeed, one of Monsanto’s lead defense attorneys in the San Francisco case was George Lombardi, whose resumé boasts of his work defending big tobacco.

Now, in this one case, through the suffering of one man, Monsanto’s secretive strategies have been laid bare for the world to see. Monsanto was undone by the words of its own scientists, the damning truth illuminated through the company’s emails, internal strategy reports and other communications.

The jury’s verdict found not only that Monsanto’s Roundup and related glyphosate-based brands presented a substantial danger to people using them, but that there was “clear and convincing evidence” that Monsanto’s officials acted with “malice or oppression” in failing to adequately warn of the risks.

Testimony and evidence presented at trial showed that the warning signs seen in scientific research dated back to the early 1980s and have only increased over the decades. But with each new study showing harm, Monsanto worked not to warn users or redesign its products, but to create its own science to show they were safe. The company often pushed its version of science into the public realm through ghostwritten work that was designed to appear independent and thus more credible. Evidence was also presented to jurors showing how closely the company had worked with Environmental Protection Agency officials to promote the safety message and suppress evidence of harm.

“The jury paid attention throughout this long trial and clearly understood the science and also understood Monsanto’s role in trying to hide the truth,” said Aimee Wagstaff, one of several attorneys around the US who are representing other plaintiffs making similar claims to Dewayne Johnson.

This case and the verdict specifically concern the 46-year-old father who developed a severe and fatal form of non-Hodgkin’s lymphoma while working as a school groundskeeper, repeatedly spraying large quantities of Monsanto’s Roundup and other glyphosate herbicide brands. Doctors have said he probably does not have long to live.

The ramifications, however, are much broader and have global implications. Another trial is set to take place in October in St Louis and roughly 4,000 plaintiffs have claims pending with the potential outcomes resulting in many more hundreds of millions, if not billions of dollars in damage awards. They all allege not only that their cancers were caused by exposure to Monsanto’s herbicides, but that Monsanto has long known about, and covered up, the dangers. The team of plaintiffs’ attorneys leading the litigation say they so far have brought to light only a fraction of evidence collected from Monsanto’s internal files and plan to reveal much more in future trials.

Monsanto maintains it has done nothing wrong, and that the evidence has been misrepresented. Its attorneys say they have the bulk of scientific research firmly on their side, and that they will appeal against the verdict, meaning it could be years before Johnson and his family see a dime of the damage award. In the meantime, his wife, Araceli, works two jobs to support the couple and their two young sons as Johnson prepares for another round of chemotherapy.

But as this case and others drag on, one thing is clear: this is not just about one man dying of cancer. Glyphosate-based herbicides are so widely used around the globe (roughly 826 million kg a year) that residues are commonly found in food and water supplies, and in soil and air samples. US scientists have even recorded the weed killer residues in rainfall. Exposure is ubiquitous, virtually inescapable.

Acknowledgement of risk is essential to public protection. Regulators, however, have failed to heed the warnings of independent scientists for too long, even shrugging off the findings of the World Health Organization’s top cancer scientists who classified glyphosate as a probable human carcinogen.

Now, well past time, long-held corporate secrets have been exposed.

In his closing argument, the plaintiff’s attorney, Brent Wisner, told the jury it was time for Monsanto to be held accountable. This trial, he said, was the company’s “day of reckoning”.