Stop and check your pantry.
Glyphosate
We bought 20 of the most popular organic oat brands in America – from Whole Foods, Costco, Trader Joe’s, and bulk bins in CA, TX, and IA – and sent them for blind, third-party testing.
14 out of 20 tested positive for glyphosate. Even brands that market themselves as “Glyphosate Free” on their website. The highest sample came back at 127 ppb.
This is the full breakdown of how we tested, what we found, and why the USDA Organic seal in the United States does NOT mean zero glyphosate.
Watch the full 18-minute documentary cut at the top of this page.
At a Glance
Brands Tested: 20 organic oat brands
Lab Method: Blind ISO 17025 accredited lab, LC-MS/MS, 5 ppb detection limit
Result: 14/20 positive for glyphosate
Highest Residue: 127 ppb [still well below EPA tolerance of 30 ppm / 30,000 ppb for oats]
Lots Tested: Specific lots purchased March 2026. Results do not represent all lots or all time periods.
How We Tested: No Games, Just Data
We wanted results brands can’t argue with.
- Chain of Custody: We purchased sealed retail bags ourselves, logged lot numbers, store location, and purchase date on camera, and shipped directly to the lab.
- Lab Method: We used LC-MS/MS [Liquid Chromatography with tandem Mass Spectrometry] with a 5 ppb limit of detection. This is the gold standard. It’s far more specific than ELISA strip tests, which many brands use to claim “Glyphosate Free” because ELISA is prone to false negatives and cross-reactivity.
- Blind Testing: The lab did not know which brands were which.
- ISO 17025 Accredited: The lab is ISO 17025 accredited for this analysis.
Why this matters: If you want to prove something is truly below 10 ppb, you can’t use a cheap test kit. You need LC-MS/MS.
The Results
We divided the 20 brands into three groups:
The 3 Cleanest: Non-detect at 5 ppb
These brands showed no detectable glyphosate at our detection limit on the lots we tested. We will publish the lot numbers and lab reports for these brands to our email list first.
The Gray Zone: 12 Brands
These tested positive between 5 ppb and 50 ppb. Low levels, but not zero. This is where most certified organic oats landed.
The 3 Dirtiest: Highest Detections
These included bulk bin oats and bagged brands that tested highest, including one sample at 127 ppb. Cross-contamination and sourcing practices appear to be major factors.
Full brand-by-brand results, lab reports, and lot numbers are available in the video and in the downloadable PDF at the bottom of this post. Mention of brands, certifiers like CCOF, Oregon Tilth, QAI, and retailers is for factual reporting of our purchases and does not imply wrongdoing.
7 Brutal Truths About Organic Oats
Truth 1: Organic Is A Process Claim, Not A Purity Claim.
Under 7 U.S.C. 6501 et seq and 7 CFR Part 205, USDA Organic certifies how something was grown. It does not require lot-level residue testing to guarantee zero contamination. The system is built on paperwork, not purity testing.
Truth 2: Why Oats Are Sprayed BEFORE Harvest.
In conventional farming, glyphosate is often used as a desiccant to dry down the crop before harvest. That means oats are sprayed right before they go into the food supply. Organic oats should not be desiccated, but drift, shared fields, and shared equipment can bring residue in.
Truth 3: “Glyphosate Free” Means Nothing Legally.
There is no federal legal definition for “Glyphosate Free” in the U.S. Anyone can put it on a website. Without a third-party standard like The Detox Project’s Glyphosate Residue Free certification and lot-level LC-MS/MS data, it’s marketing.
Truth 4: ELISA vs. LC-MS/MS – How Testing Can Be Gamed.
ELISA is cheap and fast. LC-MS/MS is expensive and accurate. Brands that only show ELISA results may be missing low-level contamination.
Truth 5: You Cannot Wash or Soak It Away.
Glyphosate is systemic. Rinsing, soaking, or overnight oats will not remove it.
Truth 6: What The Science Actually Says.
We are not giving medical advice. For your own research, regulators disagree: IARC Monograph Volume 112 classified glyphosate as “probably carcinogenic to humans” [Group 2A], while the U.S. EPA in its Interim Registration Review Decision found no risks of concern when used per label. Read both, including the Zhang et al. 2019 meta-analysis on Non-Hodgkin Lymphoma.
Truth 7: Organic Is A Paperwork System, Not A Testing System.
Certification relies on farmer affidavits, buffer zones, and audit trails. USDA’s Pesticide Data Program does find occasional residues in organic foods. That doesn’t mean the farmer cheated – it means organic is vulnerable to contamination in the real world.
The Solution: The 5-Point Bulletproof Paperwork System
If you are a brand, or a shopper who wants to ask better questions, every truly clean brand should be able to show you this for each lot:
Farmer Affidavit: Signed statement – no glyphosate used, no desiccation, buffer zones maintained.
Field History & Clean Transport Affidavit: What was grown in that field last year, and proof trucks/bins were cleaned.
Supplier Guarantee Letter: Legally binding guarantee from the mill/supplier.
Lot-Level LC-MS/MS Test: Not ELISA. LC-MS/MS at <10 ppb from an ISO 17025 lab for THAT lot.
Chain of Custody: From field to bag, with lot numbers you can trace.
[FREE DOWNLOAD]: Get our template pack – Farmer Affidavit + Clean Transport Affidavit + Supplier Guarantee Letter – in the comments and email newsletter.
What You Should Do Tomorrow Morning
Check your lot number. Don’t panic – all levels we found were below EPA tolerance.
Ask your brand for the 5 documents above for your specific lot. Clean brands love showing this.
Store oats properly at home. Airtight storage and good pantry practices help prevent post-purchase cross-contamination. We fund this independent testing with small commissions from tools, vacuum sealers, and storage we recommend – thank you.
The Debate: Should USDA Create Two Tiers?
This is the big question.
Should USDA keep one green seal for all organic, or create an Organic Plus / Gold Standard seal that REQUIRES:
Lot-level LC-MS/MS testing below 10 ppb
Full chain-of-custody proof
Annual public residue reporting
Would that reward excellence or create confusion? What is more American – enforcing a minimum, or rewarding the best?
Tell us in the comments.
Next Week: We tested organic WHOLE WHEAT BREAD. One organic loaf had MORE glyphosate than its conventional version from the same company.
Documents & Statutes Mentioned – Read Them Yourself:
IARC Monograph Volume 112 – Glyphosate
EPA Interim Registration Review Decision – Glyphosate
Zhang et al. 2019 Meta-Analysis on NHL: Mutation Research
USDA Pesticide Data Program 2020
7 U.S.C. 6501 et seq – Organic Foods Production Act
7 CFR Part 205 – USDA Organic Regulations
Detox Project Glyphosate Residue Free Standard
Disclaimer:
This article and the related video are for educational and informational purposes only and reflect our independent lab test results and our opinion on publicly available regulations and scientific literature. This is not medical advice, legal advice, or dietary advice. Our tests were conducted on specific lots purchased in March in CA, TX, and IA and results may not represent all lots or all time periods. Residue levels discussed were below the U.S. EPA tolerance for oats [30 ppm / 30,000 ppb]. Organic certification in the U.S. is governed by 7 U.S.C. 6501 and 7 CFR Part 205. Mention of brands, certifiers [CCOF, Oregon Tilth, QAI], retailers [Whole Foods, Costco, Trader Joe’s], and products is for factual reporting and does not imply wrongdoing. All trademarks are property of their respective owners. We are not affiliated with USDA, FDA, EPA, IARC, or The Detox Project. Some links are affiliate links, including Home Depot, which may earn us a small commission at no extra cost to you. This helps fund independent lab testing. Always consult your healthcare provider and read current federal regulations for personal decisions.[Roundup]