For many of us, coffee is a daily ritual. The aroma of freshly brewed beans, the warmth of the cup in our hands — it’s how we start the day.
But as more people start asking what’s really in their food, coffee has landed under the same spotlight as cereals, honey, bread, and oats. So here’s the question that keeps popping up:
Is Coffee Full of Pesticides? What Does the Testing Really Show?
Short answer: not “full,” but far from clean.
Independent testing overseas has found trace pesticide residues — including glyphosate and AMPA — in both conventional and organic coffees. The levels are small, but the bigger story isn’t about the number in isolation. It’s about what those residues say about our wider food system, and what they mean once they’re added to everything else we consume in a day.
Let’s break it down properly.
What Independent Coffee Testing Reveals About Glyphosate and AMPA
One of the most comprehensive looks at coffee contamination came from the Clean Label Project in the United States. They tested 57 coffee products across 45 brands, running more than 7,000 individual analyses for contaminants like pesticides, heavy metals, and mould toxins.
Their findings were interesting:
- Most coffees were free from high levels of toxins.
- Trace levels of glyphosate were detected in some samples.
- AMPA, glyphosate’s main breakdown product, showed up in 72% of samples — including every organic coffee tested.
Organic certification prohibits glyphosate use, yet AMPA was still present. That doesn’t mean organic farmers are secretly spraying. It points to something deeper and more troubling:
In other words, this isn’t about farming choices — it’s about environmental contamination. Glyphosate has become so persistent in the environment that even organic crops can’t avoid it.
So while the testing results didn’t show anything “dangerous” on paper, they revealed a pattern we’ve seen across many foods — glyphosate traces turning up where you’d least expect them.
Why Glyphosate and Other Pesticides End Up in Coffee Beans
Coffee farming varies from country to country, but many plantations grow coffee in large monocultures. Managing weeds in those systems can be challenging, and glyphosate is often used to keep surrounding areas clear. Even if glyphosate isn’t sprayed directly on the coffee plants themselves, several pathways bring it into the bean:
- Environmental contamination — drift from nearby spraying.
- Contaminated soil or water — residues moving through the environment long after application.
- Systemic absorption — glyphosate moves inside plant tissues if exposure occurs.
Then there’s roasting. Many people assume heat kills everything, but glyphosate is surprisingly stable. Residues can persist right through processing, grinding, packaging, and into your cup.
In other words: the pathway isn’t simple — and it doesn’t have to be intentional for residues to appear.
Are Glyphosate Residues in Coffee Actually Safe? Understanding the Limits
This is where things get murky.
When regulators say the levels are “safe,” they usually refer to Maximum Residue Limits (MRLs). But an MRL isn’t a health-based limit — it’s a number set to reflect residues expected from “normal agricultural practice.”
So an MRL answers a farming question, not a health question.
And that’s where consumers are often misled.
Coffee residue levels are usually low, but even low levels of pesticides in coffee raise several issues:
- Safety assessments look at one chemical at a time — not the dozens we consume across a full day.
- Chronic low-dose exposure remains understudied — especially when multiple chemicals share similar biological pathways.
- Testing is heavily skewed toward short-term toxicity, not long-term endocrine, metabolic, or microbiome effects.
- Environmental persistence means organic is no longer a guaranteed shield.
So while your coffee might be considered “safe” in isolation, the truth is simpler:
your body doesn’t experience exposures in isolation.
What New Zealand Isn’t Testing: Coffee, Glyphosate, and the Transparency Gap
At the moment, New Zealand does not routinely test coffee for glyphosate residues.
We’ve tested honey. We’ve tested bread. We’ve tested cereals. But coffee? No.
So we’re left relying on overseas data and crossed fingers.
There’s no reason coffee shouldn’t be included in NZ’s residue surveillance — especially when the global evidence shows glyphosate and AMPA appearing in both organic and conventional coffees.
Imagine if New Zealand coffee brands voluntarily released real batch-by-batch residue testing. Clean Label Project didn’t publish their results because they had to. They did it because consumers deserve clarity.
That level of transparency isn’t happening here… yet.
Coffee Is Just One Source of Exposure — Here’s the Bigger Picture
Coffee is just one more place where glyphosate quietly appears. We’ve seen the same story play out across:
- Honey (our testing found glyphosate even in jars marketed as “pure”)
- Cereals and Weet-Bix (glyphosate detected in iconic breakfast staples)
- Bread (glyphosate contamination confirmed in NZ loaves)
- Imported grains (higher-risk supply chains)
- Waterways and soil (widespread environmental persistence)
So the question stops being, “Is my coffee safe?”
And becomes:
“How many different exposures am I unknowingly stacking every day?”
This is why cumulative exposure matters so much more than the residue in any one product.
Practical Ways to Reduce Pesticide Exposure in Your Daily Coffee
You don’t need to give up coffee altogether — but you can make choices that lower risk.
Choose certified organic coffee when you can.
Organic standards prohibit glyphosate use. It’s not perfect protection, but it reduces intentional spraying.
Support transparent coffee brands.
If any NZ companies start publishing pesticide test results, they should be rewarded with consumer support.
Mix your risk.
Glyphosate exposure isn’t just in coffee. Check your cereals, bread, honey, oats, and pantry staples. Reducing residue load across your diet matters more than perfecting one item.
Stay curious. Ask questions.
If labels don’t tell you anything meaningful, ask the producer why.
How Much Glyphosate Exposure Is Too Much? The Question No One Can Answer
Regulators don’t have a clear answer.
Scientists don’t have a clear answer.
And consumers definitely don’t.
That’s not your failure — it’s a failure of the system.
The truth is simple:
Coffee might only contain tiny residues, but it’s part of a much larger picture — a picture where glyphosate shows up in foods, soils, waterways, and even products marketed as “clean.”
When chemicals are everywhere, “trace amounts” stop looking reassuring.
They start looking like a warning.
You shouldn’t have to wonder whether your morning ritual comes with a side of weedkiller.
But until we have better testing, better transparency, and better accountability, the question stands:
How much exposure is too much when it’s turning up everywhere?
Resources & References
When it comes to glyphosate in our food and drinks — even in something as everyday as coffee — the details matter. Independent testing, global health agencies, and investigative writers all offer different pieces of the puzzle. The resources below provide a wider lens, so you can see how coffee fits into the much bigger conversation about pesticides, health, and regulation.
Clean Label Project – Coffee Study
https://cleanlabelproject.org/coffee-study/
Independent testing of 57 coffee products across 45 brands, with more than 7,000 tests for contaminants including pesticides, heavy metals, and mold toxins. Trace glyphosate was detected but below regulatory thresholds.
World Health Organization / IARC – Glyphosate Classification
https://www.iarc.who.int/featured-news/media-centre-iarc-news-glyphosate/
In 2015, the International Agency for Research on Cancer (IARC) classified glyphosate as “probably carcinogenic to humans,” sparking global debate and regulatory reviews.
European Food Safety Authority – Glyphosate Safety Assessment
https://www.efsa.europa.eu/sites/default/files/2023-07/glyphosate_factsheet.pdf
A detailed factsheet outlining EFSA’s latest scientific assessment of glyphosate, covering human and environmental health data from many studies.
Environmental Working Group – Pesticides in Food
https://www.ewg.org/foodnews/summary.php
EWG’s annual “Dirty Dozen” and “Clean Fifteen” lists help consumers understand pesticide residues in fruits and vegetables. While coffee isn’t included, the findings show how common pesticide exposure is in the food supply.
US Environmental Protection Agency – Glyphosate Overview
https://www.epa.gov/ingredients-used-pesticide-products/glyphosate
EPA maintains that glyphosate is safe when used as directed, providing insight into how US regulators view the herbicide compared with global watchdogs.
Time – Are Pesticides in Your Food Harmful?
https://time.com/7291075/are-pesticides-dangerous-maha-glyphosate-atrazine/
A recent article exploring the health risks of pesticides—particularly glyphosate—and offering practical tips for reducing exposure through dietary and lifestyle choices
No More Glyphosate NZ – Glyphosate in Honey: First Test Results
https://nomoreglyphosate.nz/glyphosate-in-nz-honey-first-test-results/
Independent testing in New Zealand honey jars revealed trace levels of glyphosate, raising concerns about residues even in products marketed as natural and pure.
No More Glyphosate NZ – Weet-Bix Glyphosate Test Results
https://nomoreglyphosate.nz/weet-bix-glyphosate-test-results/
Testing of one of New Zealand’s most iconic breakfast foods found glyphosate contamination, showing how exposure begins first thing in the morning.
Further Reading
Whitewash: The Story of a Weed Killer, Cancer, and the Corruption of Science
By Carey Gillam
https://nomoreglyphosate.nz/whitewash-carey-gillam-monsanto-expose/
An investigative deep dive into glyphosate’s history, the science linking it to health risks, and the influence of corporations on regulators. Essential background for anyone wanting to understand why “safe” isn’t always simple.
Toxic Legacy: How the Weedkiller Glyphosate Is Destroying Our Health and the Environment
By Stephanie Seneff
https://nomoreglyphosate.nz/toxic-legacy-stephanie-seneff-review/
MIT researcher Stephanie Seneff examines glyphosate’s potential role in chronic disease, gut health disruption, and environmental damage. Controversial, but an important voice in the debate.
Coffee may only be one sip of the story. Glyphosate has woven itself into cereals, bread, honey, and countless other foods we consume daily. These references are a starting point for questioning the official narrative of “safe” exposure — and for asking whether we should accept any level of weedkiller in our morning cup.
Image Source & Attribution
A big thank you to the creators at Unsplash for making their images freely available for projects like ours. The image featured on this page is by cami. You can explore more of their work here: https://unsplash.com/@casnafu.
