Alarming Levels of Glyphosate Found in Popular American Foods
By Carey Gillam
Independent tests on an array of popular American food products found many samples contained residue levels of the weed killer glyphosate. The nonprofit organizations behind the tests—Food Democracy Now and The Detox Project—released a report Monday that details the findings. The groups are calling for corporate and regulatory action to address consumer safety concerns.
According to the report, the herbicide residues were found in cookies, crackers, popular cold cereals and chips commonly consumed by children and adults. The testing was completed at Anresco, a U.S. Federal Drug Administration (FDA) registered lab and used liquid chromatography tandem mass spectrometry (LC-MS/MS), a method widely considered by the scientific community and regulators as the most reliable for analyzing glyphosate residues.
The announcement of the private tests comes as the FDA is struggling with its own efforts to analyze how much of the herbicide residues might be present in certain foods. Though the FDA routinely tests foods for other pesticide residues, it never tested for glyphosate until this year. However, the testing for glyphosate residues was suspended last week.
FDA Suspends Testing Foods for Glyphosate Residues https://t.co/BCtov2cRlD @gmo917 @GMWatch— EcoWatch (@EcoWatch)1479005704.0
Glyphosate has been under the spotlight since the World Health Organization's International Agency for Research on Cancer classified the herbicide as a probable human carcinogen last year. Glyphosate is the world's most widely used herbicide and is the key ingredient in Monsanto's Roundup and hundreds of other products. The U.S. Environmental Protection Agency (EPA) is finalizing a risk assessment for glyphosate to determine if future use should be limited.
The tests conducted by Anresco were done on 29 foods commonly found on grocery store shelves. According to the report, glyphosate residues were found in:
- General Mills' Cheerios at 1,125.3 parts per billion (ppb)
- Kashi soft-baked oatmeal dark chocolate cookies at 275.57 ppb
- Ritz Crackers at 270.24 ppb
Different levels were found in Kellogg's Special K cereal, Triscuit Crackers and several other products. The report notes that for some of the findings, the amounts were "rough estimates at best and may not represent an accurate representation of the sample." The food companies did not respond to a request for comment.
"Frankly, such a high level of glyphosate contamination found in Cheerios, Doritos, Oreos and Stacy's Pita Chips are alarming and should be a wake-up call for any parent trying to feed their children safe, healthy and non-toxic food," Dave Murphy, executive director of Food Democracy Now!," said.
The EPA sets a "maximum residue limit" (MRL), also known as a tolerance, for pesticide residues on food commodities, like corn and soybeans. MRLs for glyphosate vary depending upon the commodity. Finished food products like those tested at Anresco might contain ingredients from many different commodities.
The nonprofits behind the report said that concerns about glyphosate comes as new research shows that Roundup can cause liver and kidney damage in rats at only 0.05 ppb, and additional studies have found that levels as low as 10 ppb can have toxic effects on the livers of fish.
"With increasing evidence from a growing number of independent peer-reviewed studies from around the world showing that the ingestion of glyphosate-based herbicides like Roundup can result in a wide range of chronic illnesses, it's urgent that regulators at the EPA reconsider the allowed levels of glyphosate in American's food and work to limit continued exposure to this pervasive chemical in as large a section of the human population as possible," Dr. Michael Antoniou, a molecular geneticist from London, UK, said in reaction to the report released Monday.
"The information gathered by this glyphosate food testing project is very timely and provides valuable information for consumers, elected officials and scientists, like myself, in evaluating the toxicity of real world levels of exposure to this most widely used pesticide," Antoniou continued.
The groups criticized U.S. regulators for setting an acceptable daily intake (ADI) for glyphosate at much higher levels than other countries consider safe. The U.S. has set the ADI for glyphosate at 1.75 milligrams per kilogram of bodyweight per day (mg/kg/bw/day) while the European Union has set it at 0.3. The EPA is supposed to set an ADI from all food and water sources that is at least 100 times lower than levels that have been demonstrated to cause no effect in animal testing. But critics assert that the EPA has been unduly influenced by the agrichemical industry.
EPA Bows to Industry in Delay of Glyphosate Cancer Review https://t.co/LqPkJg2M4W @food_democracy @eartheats— EcoWatch (@EcoWatch)1477090512.0
The groups said that the federal government should conduct an investigation into the "harmful effects of glyphosate on human health and the environment," and the relationships between regulators and the agrichemical industry that has long touted the safety of glyphosate.
"It's time for regulators at the EPA and the White House to stop playing politics with our food and start putting the wellbeing of the American public above the profits of chemical companies like Monsanto," Murphy said.
Monsanto has repeatedly said that there are no legitimate safety concerns regarding glyphosate when it is used as intended, and that toxicological studies in animals have demonstrated that glyphosate does not cause cancer, birth defects, DNA damage, nervous system effects, immune system effects, endocrine disruption or reproductive problems. The company, which has been reaping roughly $5 billion a year from glyphosate-based products, said any glyphosate residues in food are too minimal to be harmful.
The U.S. Department of Agriculture and the FDA have echoed Monsanto's reassurances in the past, citing the chemical's proven safety as justification for not including glyphosate residue testing in annual programs that test thousands of food products each year for hundreds of different types of pesticides. But the lack of routine government monitoring has made it impossible for consumers or regulators to determine what levels of glyphosate are present in foods, which has raised many questions about the safety of the chemical.
A key reason glyphosate residues persist in so many food products has to do with its widespread use in food production. Glyphosate is sprayed directly on many crops genetically engineered to tolerate the herbicide, such as corn, soybeans, sugar beets and canola. Glyphosate is also sprayed directly on many types of conventional crops ahead of harvest, including wheat, oats and barley. In all, glyphosate is used in some fashion in the production of at least 70 food crops, according to the EPA, including a range of fruits, nuts and veggies. Even spinach growers use glyphosate.
The groups that released the report are calling for a permanent ban on the use of glyphosate as a pre-harvest drying agent because of the residue levels.
A recent analysis done by a senior FDA chemist found glyphosate residues in several types of oatmeal products, including baby food, and in several honey samples. The glyphosate residues found in honey were higher than allowed in the European Union.
By Melissa Gaskill
Two decades ago scientists and volunteers along the Virginia coast started tossing seagrass seeds into barren seaside lagoons. Disease and an intense hurricane had wiped out the plants in the 1930s, and no nearby meadows could serve as a naturally dispersing source of seeds to bring them back.
Restored seagrass beds in Virginia now provide habitat for hundreds of thousands of scallops. Bob Orth, Virginia Institute of Marine Science / CC BY 2.0<p>The paper is part of a growing trend of evidence suggesting seagrass meadows can be easier to restore than other coastal habitats.</p><p>Successful seagrass-restoration methods include <a href="https://www.sciencedirect.com/science/article/abs/pii/S0304377099000078?via%3Dihub" target="_blank">transplanting shoots</a>, <a href="https://onlinelibrary.wiley.com/doi/10.1111/j.1061-2971.2004.00314.x" target="_blank" rel="noopener noreferrer">mechanized planting</a> and, more recently, <a href="https://www.nature.com/articles/s41467-020-17438-4" target="_blank" rel="noopener noreferrer">biodegradable mats</a>. Removing threats, proximity to donor seagrass beds, planting techniques, project size and site selection all play roles in a restoration effort's success.</p><p>Human assistance isn't always necessary, though. In areas where some beds remain, seagrass can even recover on its own when stressors are reduced or removed. For example, seagrass began to recover when Tampa Bay improved its water quality by reducing nitrogen loads from runoff by roughly 90%.</p><p>But more and more, seagrass meadows struggle to hang on.</p><p>The marine flowering plants have declined globally since the 1930s and currently disappear at a rate equivalent to a football field every 30 minutes, according to the <a href="https://www.unep.org/resources/report/out-blue-value-seagrasses-environment-and-people" target="_blank" rel="noopener noreferrer">United Nations Environment Programme</a>. And research published in 2018 found the rate of decline is <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GB005941" target="_blank" rel="noopener noreferrer">accelerating</a> in many regions.</p><p>The causes of decline vary and overlap, depending on the region. They include thermal stress from climate change; human activities such as dredging, anchoring and coastal infrastructure; and intentional removal in tourist areas. In addition, increased runoff from land carries sediment that clouds the water, blocking sunlight the plants need for photosynthesis. Runoff can also carry contaminants and nutrients from fertilizer that disrupt habitats and cause algal blooms.</p><p>All that damage comes with a cost.</p>
The Value of Seagrass<p>As with ecosystems like rainforests and <a href="https://therevelator.org/mangroves-climate-change/" target="_blank">mangroves</a>, loss of seagrass increases carbon dioxide emissions. And that spells trouble not just for certain habitats but for the whole planet.</p><p>Although seagrass covers at most 0.2% of the seabed, it <a href="https://www.unenvironment.org/news-and-stories/story/seagrass-secret-weapon-fight-against-global-heating" target="_blank">accounts for 10%</a> of the ocean's capacity to store carbon and soils, and these meadows store carbon dioxide an estimated 30 times faster than most terrestrial forests. Slow decomposition rates in seagrass sediments contribute to their <a href="https://www.researchgate.net/publication/238506081_Assessing_the_capacity_of_seagrass_meadows_for_carbon_burial_Current_limitations_and_future_strategies" target="_blank" rel="noopener noreferrer">high carbon burial rates</a>. In Australia, according to <a href="https://onlinelibrary.wiley.com/doi/10.1111/gcb.15204" target="_blank" rel="noopener noreferrer">research</a> by scientists at Edith Cowan University, loss of seagrass meadows since the 1950s has increased carbon dioxide emissions by an amount equivalent to 5 million cars a year. The United Nations Environment Programme reports that a 29% decline in seagrass in Chesapeake Bay between 1991 and 2006 resulted in an estimated loss of up to 1.8 million tons of carbon.</p>
Eelgrass in the river delta at Prince William Sound, Alaska. Alaska ShoreZone Program NOAA / NMFS / AKFSC; Courtesy of Mandy Lindeberg / NOAA / NMFS / AKFSC<p>Seagrasses also protect costal habitats. A healthy meadow slows wave energy, reduces erosion and lowers the risk of flooding. In Morro Bay, California, a 90% decline in the seagrass species known as eelgrass caused extensive erosion, according to a <a href="https://www.sciencedirect.com/science/article/abs/pii/S0272771420303528?via%3Dihub" target="_blank" rel="noopener noreferrer">paper</a> from researchers at California Polytechnic State University.</p><p>"Right away, we noticed big patterns in sediment loss or erosion," said lead author Ryan Walter. "Many studies have shown this on individual eelgrass beds, but very few studies looked at it on a systemwide scale."</p><p>In the tropics, seagrass's natural protection can reduce the need for expensive and often-environmentally unfriendly <a href="https://www.nioz.nl/en/news/zeegras-spaart-stranden-en-geld" target="_blank" rel="noopener noreferrer">beach nourishments</a> regularly conducted in tourism areas.</p><p>Seagrass ecosystems improve water quality and clarity, filtering particles out of the water column and preventing resuspension of sediment. This role could be even more important in the future. By producing oxygen through photosynthesis, meadows could help offset decreased oxygen levels caused by warmer water temperatures (oxygen is less soluble in warm than in cold water).</p><p>The meadows also provide vital habitat for a wide variety of marine life, including fish, sea turtles, birds, marine mammals such as manatees, invertebrates and algae. They provide nursery habitat for <a href="https://wedocs.unep.org/bitstream/handle/20.500.11822/32636/seagrass.pdf?sequence=1&isAllowed=y" target="_blank" rel="noopener noreferrer">roughly 20%</a> of the world's largest fisheries — an <a href="https://www.floridamuseum.ufl.edu/science/seagrass-meadows-harbor-wildlife-for-centuries/" target="_blank" rel="noopener noreferrer">estimated 70%</a> of fish habitats in Florida alone.</p><p>Conversely, their disappearance can contribute to die-offs of marine life. The loss of more than 20 square miles of seagrass in Florida's Biscayne Bay may have helped set the stage for a widespread <a href="https://www.wlrn.org/2020-08-14/the-seagrass-died-that-may-have-triggered-a-widespread-fish-kill-in-biscayne-bay" target="_blank">fish kill</a> in summer 2020. Lack of grasses to produce oxygen left the basin more vulnerable when temperatures rose and oxygen levels dropped as a result, says Florida International University professor Piero Gardinali.</p>
Damaged Systems, a Changing Climate<p>Governments and conservationists around the world have already put a lot of effort into coastal restoration efforts. And that's helped some seagrass populations.</p><p>Where stressors remain, though, restoration grows more complicated. <a href="https://www.rug.nl/research/portal/en/publications/the-future-of-seagrass-ecosystem-services-in-a-changing-world(3a8c56db-7bed-4c9e-ac7f-c72453e2a102).html" target="_blank">Research</a> published this September found that only 37% of seagrass restorations have survived. Newly restored meadows remain vulnerable to the original stressors that depleted them, as well as to storms — and <a href="https://www.ecowatch.com/tag/climate-crisis">climate change</a>.</p>
Seagrass in Dry Tortugas National Park, Florida. Alicia Wellman / Florida Fish and Wildlife / CC BY-NC-ND 2.0<p>In Chesapeake Bay a cold-water species of seagrass is currently hitting its heat limit, especially in summer, according to Alexander Challen Hyman of University of Florida's School of Natural Resources and Environment. As waters continue to warm due to climate change, the species likely will disappear there.</p><p>Climate-driven sea-level rise complicates the problem as well. Seagrasses thrive at specific depths — too shallow and they dry out or are eaten, too deep and there isn't enough light for photosynthesis.</p>
But There’s Good News, Too<p>Luckily, left to its own devices, a seagrass meadow can flourish for hundreds of years, according to a <a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2019.1861" target="_blank" rel="noopener noreferrer">paper</a> published last year by Hyman and other researchers from the University of Florida. The researchers arrived at their conclusion by looking at shells of living mollusks and fossil shells to estimate the ages of meadows in Florida's Big Bend region on the Gulf Coast.</p><p>That area has extensive, relatively pristine seagrass meadows. "Our motivation was to understand the past history of these systems, and shells store a lot of history," said co-author Michal Kowalewski.</p><p>A high degree of similarity between living and dead shells indicates a stable area, while a mismatch suggests an area shifted from seagrass to barren sand. The researchers found that long-term accumulations of shells resembled living ones, suggesting that the seagrass habitats have been stable over time.</p><p>That stability allows biodiversity to thrive, creating conditions where specialist species can survive and flourish, according to Hyman.</p><p>Discovering the long-term stability of seagrass meadows has implications for choosing restoration sites, Kowalewski notes.</p><p>"There must be reasons they thrive in one place, while a mile away they don't and fossil data says they probably never did," he said. "If we remove a seagrass patch, we cannot hope to plant it somewhere else. It's not just the seagrass that is special. The location at which it's found is special, too."</p><p>A better approach is conserving these habitats in the first place, but we're not doing enough of that right now. The UN reports that marine protected areas safeguard just 26% of recorded seagrass meadows, compared with 40% of coral reefs and 43% of mangroves.</p>
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