Glyphosate shows up in two broad categories: weed-killing products you can buy at a hardware store, and trace residues in a surprisingly wide range of foods and drinks. It is the most widely used herbicide in the world, sprayed on farms, lawns, and public spaces, which means it ends up in grain, beans, beer, wine, honey, and even meat at low levels.
Herbicide Products You Can Buy
The most recognizable glyphosate product is Roundup Weed and Grass Killer, but dozens of generic versions sit on the same shelf. Any product labeled as a “non-selective herbicide” with glyphosate listed as the active ingredient falls into this group. You’ll find them sold as concentrates, ready-to-spray bottles, and wand applicators at garden centers, hardware stores, and farm supply retailers. Brands include Roundup, Ranger Pro, Compare-N-Save, and Hi-Yield, among many others.
One detail worth knowing: not everything with “Roundup” on the label actually contains glyphosate anymore. Purdue University Extension has pointed out that some newer Roundup-branded products use entirely different active ingredients, like triclopyr for woody brush. If you’re specifically trying to find or avoid glyphosate, check the active ingredient panel rather than relying on the brand name.
Oat-Based Cereals and Snacks
Oats are one of the biggest dietary sources of glyphosate residue. Testing by the Environmental Working Group detected glyphosate in more than 95% of conventional oat-based products sampled, including children’s cereals. The levels vary enormously from brand to brand.
In EWG’s 2018 lab results, some of the highest readings came from Quaker Oatmeal Squares, which tested at 2,746 and 2,837 parts per billion (ppb) for the Brown Sugar and Honey Nut varieties. For context, EWG’s own child-protective benchmark is 160 ppb. Cheerios varieties ranged from about 470 ppb for the original Toasted Whole Grain to over 1,100 ppb for Cheerios Oat Crunch Cinnamon. Honey Nut Cheerios tested between 833 and 894 ppb. Lucky Charms came in at 230 to 400 ppb.
Granola products showed a similar pattern. Quaker Simply Granola with Oats, Honey, and Almonds tested at 625 to 862 ppb, while Nature Valley Crunchy Granola Bars landed between 120 and 340 ppb. Organic products were a different story: Kashi Heart to Heart Organic and Nature’s Path Organic Honey Almond both came back with no detectable glyphosate. Cascadian Farm Organic Harvest Berry bars also tested clean.
Why Oats, Wheat, and Beans Are Hotspots
Glyphosate doesn’t just reach crops because of weed control during the growing season. Farmers also spray it directly on certain crops right before harvest to dry them out, a practice called desiccation. This is common with dry beans, wheat, oats, and lentils. Michigan State University Extension describes glyphosate as the “most consistent and effective” pre-harvest herbicide for dry beans, noting that many fields are treated with it in the weeks before picking.
Because the herbicide is applied so close to harvest, residues don’t have much time to break down before the crop is processed into food. That’s a key reason why grain and legume products tend to carry higher glyphosate levels than fruits or vegetables, where it’s used earlier in the growing cycle or not at all.
Beans, Lentils, and Hummus
EWG testing in 2020 found glyphosate in 60% of conventional bean and lentil samples. Chickpea products fared worse: more than 80% of conventional hummus and chickpea samples tested positive. Pinto beans have also shown detectable residues. If you eat beans or lentils regularly, these are among the more significant dietary sources.
Beer and Wine
Glyphosate turns up in alcoholic beverages made from grain and grapes. Testing by the U.S. PIRG Education Fund found it in the majority of beer and wine samples. Sutter Home Merlot (2018 vintage) had the highest reading at 51 ppb. Among beers, Coors, Tsingtao, and Miller Lite each contained levels above 25 ppb. Peak Beer was the only brand in the study with no detectable glyphosate.
Even organic products weren’t completely free of it. Samuel Smith Organic beer tested at 3.5 ppb, and Inkarri Estate Organic wine showed 5.2 ppb. These levels are far lower than in conventional products, but they suggest that glyphosate’s widespread use leads to low-level environmental contamination that reaches crops even when it isn’t applied directly.
Honey, Meat, and Dairy
Honey is a notable source because bees forage across large areas that may include treated fields. Studies in Canada, Switzerland, and the U.S. have detected glyphosate in honey samples. In the U.S., residues appeared in about 30% of samples tested, with more than half of those exceeding legal limits. One sample contained seven times the allowed level. European studies have generally found lower concentrations, though some still exceeded limits.
Meat, fish, and dairy contain glyphosate at much lower levels. A large sampling study found residues in about 23% of meat and fish samples, with concentrations ranging from less than 1 to 4.9 micrograms per kilogram, all below the legal limit of 50. Milk samples showed even lower levels, typically under 0.5 micrograms per kilogram. Glyphosate doesn’t accumulate in animal tissue the way some pesticides do. Animal studies show that roughly 99% of an absorbed dose clears the body within a week.
Wheat Products
Bread, crackers, pasta, and other wheat-based foods are another common source, again largely because of pre-harvest spraying. EWG and other groups have confirmed glyphosate residues in wheat products, though specific brand-level data for wheat is less widely published than for oat products. Conventional whole wheat items are more likely to carry residues than refined white flour products, since glyphosate concentrates in the outer layers of the grain.
How to Reduce Your Exposure
Organic certification prohibits glyphosate use, and lab testing consistently confirms that organic products carry little to no residue. In EWG’s cereal testing, every organic product came back with no detectable glyphosate, while conventional versions of similar products routinely tested in the hundreds or thousands of ppb. Choosing organic oats, wheat, beans, and lentils is the most straightforward way to lower your dietary intake.
If switching entirely to organic isn’t practical, focusing on the highest-residue categories gives you the most impact. Oat cereals, granola, hummus, and bean products are where the biggest exposures tend to occur. Fruits, vegetables, meat, and dairy generally carry much lower levels.
The Safety Debate
Whether these residue levels are harmful is genuinely unsettled. The U.S. EPA classifies glyphosate as “not likely to be carcinogenic to humans.” The International Agency for Research on Cancer, part of the World Health Organization, classified it as “probably carcinogenic to humans” in 2015. These two agencies reviewed overlapping evidence and reached opposite conclusions, a disagreement that has fueled ongoing scientific and legal battles. The ppb levels found in food are far below what’s been linked to health effects in animal studies, but critics argue that long-term, low-level exposure hasn’t been adequately studied, especially in children.