Roundup for Breakfast, Part 2: In New Tests, Weed Killer Found in All Kids’ Cereals Sampled

WASHINGTON October 24, 2018 – A second round of tests commissioned by the Environmental Working Group found the active ingredient in Monsanto’s Roundup weed killer in every sample of popular oat-based cereal and other oat-based food marketed to children. These test results fly in the face of claims by two companies, Quaker and General Mills, which have said there is no reason for concern. This is because, they say, their products meet the legal standards.

Yet almost all of the samples tested by EWG had residues of glyphosate at levels higher than what EWG scientists consider protective of children’s health with an adequate margin of safety. The EWG findings of a chemical identified as probably carcinogenic by the World Health Organization come on the heels of a major study published in JAMA Internal Medicine that found a significant reduction in cancer risk for individuals who ate a lot of organic food.

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The tests detected glyphosate in all 28 samples of products made with conventionally grown oats. All but two of the 28 samples had levels of glyphosate above EWG’s health benchmark of 160 parts per billion, or ppb.

Products tested by Anresco Laboratories in San Francisco included 10 samples of different types of General Mills’ Cheerios and 18 samples of different Quaker brand products from PepsiCo, including instant oatmeal, breakfast cereal and snack bars. The highest level of glyphosate found by the lab was 2,837 ppb in Quaker Oatmeal Squares breakfast cereal, nearly 18 times higher than EWG’s children’s health benchmark.

New EWG Tests Find Glyphosate in All Cheerios and Quaker Oats Cereals Sampled

Type of Food

Product Name

Glyphosate (ppb)

Lab

Sample 1

Sample 2

Granola

Quaker Simply Granola Oats, Honey & Almonds

625

862

Anresco

Instant oats

Quaker Instant Oatmeal Cinnamon & Spice

128

45

Anresco

Instant oats

Quaker Instant Oatmeal Apples & Cinnamon

543

248

Anresco

Instant oats

Quaker Real Medleys Super Grains Banana Walnut

608

Anresco

Overnight oats

Quaker Overnight Oats Raisin Walnut & Honey Heaven

1029

Anresco

Overnight oats

Quaker Overnight Oats Unsweetened with Chia Seeds

1799

Anresco

Oat breakfast cereal

Quaker Oatmeal Squares Brown Sugar

2746

Anresco

Oat breakfast cereal

Quaker Oatmeal Squares Honey Nut

2837

Anresco

Oat breakfast cereal

Apple Cinnamon Cheerios

868

Anresco

Oat breakfast cereal

Very Berry Cheerios

810

Anresco

Oat breakfast cereal

Chocolate Cheerios

826

Anresco

Oat breakfast cereal

Frosted Cheerios

756

893

Anresco

Oat breakfast cereal

Fruity Cheerios

618

Anresco

Oat breakfast cereal

Honey Nut Cheerios

833

894

Anresco

Oat breakfast cereal

Cheerios Oat Crunch Cinnamon

1171

541

Anresco

Snack bar

Quaker Chewy S’mores

260

572

Anresco

Snack bar

Quaker Chewy Peanut Butter Chocolate Chip

625

275

Anresco

Snack bar

Quaker Breakfast Squares Soft Baked Bars Peanut Butter

1014

713

Anresco

Snack bar

Quaker Breakfast Flats  Crispy Snack Bars Cranberry Almond

894

Anresco

Test information: EWG scientists purchased products in grocery stores in the San Francisco Bay area and Washington, DC, area. Either one or two different samples were purchased for testing, depending on the type of product. Approximately 300 grams of each product were packaged and shipped to Anresco Laboratories, in San Francisco. Glyphosate levels were analyzed by liquid chromatography tandem mass spectrometry method, with the limit of quantification of 10 ppb. Testing methodology is described here. A PDF of the testing results is available here.


Glyphosate, the most widely used herbicide in the world, is classified by the International Agency for Research on Cancer as “probably carcinogenic” to people. The IARC has steadfastly defended that decision despite ongoing attacks by Monsanto.

In 2017, glyphosate was also listed by the California Office of Environmental Health Hazard Assessment as a chemical known to the state to cause cancer.

“How many bowls of cereal and oatmeal have American kids eaten that came with a dose of weed killer? That’s a question only General Mills, PepsiCo and other food companies can answer,” said EWG President Ken Cook. “But if those companies would just switch to oats that aren’t sprayed with glyphosate, parents wouldn’t have to wonder if their kids’ breakfasts contained a chemical linked to cancer. Glyphosate and other cancer-causing chemicals simply don’t belong in children’s food, period.”

Results of the new tests come two months after EWG’s first series of tests found glyphosate in all but two of 45 samples of foods made with conventionally grown oats, and in about one-third of the 16 products made with organic oats. About two-thirds of the samples of conventional foods had levels of glyphosate above EWG’s health benchmark.

Following release of the first batch of tests, General Mills and the Quaker Oats Company went on the defensive, noting that glyphosate levels found were within regulatory limits set by the Environmental Protection Agency.

But just because something is legal doesn’t mean it’s safe. Federal government standards for pesticides in food are often outdated, not based on the best and most current science. The EPA’s standards for pesticides and other chemicals are also heavily influenced by lobbying from industry.

Studies regularly find that the legal limits on contaminants in food, air, drinking water and consumer products fall short of fully protecting public health, particularly for children and other people more sensitive to the effects of toxic chemicals. The EPA’s legal limit for glyphosate on oats, 30 parts per million, was set in 2008, well before the cancer findings of the IARC and California state scientists.

EWG does not believe chemicals linked to cancer belong in children’s food. Our recommended maximum daily intake of glyphosate in food is 0.01 milligrams. For a 60-gram portion of food, this daily intake limit translates to a safety standard of 160 ppb of glyphosate. This health benchmark is based on the risks of lifetime exposure, because small, repeated exposures can add up if someone eats food containing glyphosate every day.

After sitting on data from its own glyphosate tests for more than a year, the Food and Drug Administration finally made the results public last month. The FDA found glyphosate on about two-thirds of corn and soybean samples. But it did not test any oats or wheat, the two main crops on which glyphosate is used as a pre-harvest drying agent.

More than 156,000 people have signed a petition from EWG and Just Label It calling on General Mills, Quaker and Kellogg’s to get glyphosate out of their products. Last month EWG – joined by companies including MegaFood, Ben & Jerry’s, Stonyfield Farm, MOM’s Organic Market, Nature’s Path, One Degree Organic Foods, Happy Family Organics, Patagonia, PCC Community Markets and Amy’s Kitchen – petitioned the EPA to sharply limit glyphosate residues allowed on oats and prohibit its use as a pre-harvest drying agent.