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Producers to Blame for Fraudulent Fillers in Ground Coffees, Researchers Say

Photo by Joe King

Photo by Joe King

Diminishing production in key growing regions like Brazil is causing some producers to use fillers like corn, soy, wood, twigs and even chunks of earth, according to researchers at the State University of Londrina in Brazil.

The research team, led by Suzana Lucy Nixdorf, is presenting a report on the use of fillers as well as a new test to determine their presence in coffee products at the American Chemical Society this week. Nixdorf says the team is pioneering research on a liquid chromatography and statistical tools process that can separate coffee compounds from fillers and other ingredients that may be adulterating ground products marked as 100% coffee. Identifying fillers and other impurities has traditionally been a subjective process run by professional coffee tasters that does not allow for accurate results, she says.

(related: Rwandan Research Team to Launch $20,000 ‘Potato Taste Defect’ Study)

“These extra ingredients, though not harmful, make ground coffee go farther and increase profits for producers,” the research team suggested in an announcement yesterday. Added Nixdorf, “With a lower supply of coffee in the market, prices rise, and that favors fraud because of the economic gain.”

The initial report does not suggest at what point in the supply chain fillers are allegedly being used, nor does it mention any specific companies, but only refers to the alleged culprits as “producers.”

Infographic provided by the American Chemical Society

Infographic provided by the American Chemical Society

The researchers have compiled a long list of filling agents that have already been discovered in lab tests, including: Corn, barley, wheat, soybeans, rice, beans, acai seed, brown sugar or starch syrup. Many of these ingredients defy claims from producers noted by the researchers that the fillers may be the unintentional or unavoidable results of coffee production, the researchers say. Other fillers with a similar color composition to coffee found were: Wood, twigs, sticks, parchment, husks, whole coffee berries and clumps of earth.

(related: Not to Sound Alarmist, But Instant Coffee Is Taking Over the World)

“Because much of the coffee is composed of carbohydrates, researchers could develop a ‘characteristic fingerprint’ when using chromatography that separates out the real coffee compounds,” says Nixdorf. “The added, unwanted grain fillers generate different levels of sugars than the natural ingredients, so they are easy to identify.”



Andy Newbom

In coffee, most of the time, “producers” (farmers, mills, exporters, importers in this bad example above) give buyers exactly what they ask and pay for. You want this years harvest coffee for $1.50 BELOW C price? Yes sir, here you go “coffee” with as many defects as we could cram into it.

So you received the samples (in green coffee form) roasted them, ground them, brewed or cupped them and then approved that coffee for purchase. You saw, counted and tasted the fillers and frogs.

Then the buyer buys the coffee in green coffee form.
The buyer roasts and grinds the coffee.
The buyer asked for and received exactly what they bought.

Last time I checked the vast majority of coffee farms were not selling roasted, pre-ground coffee under the name of Folgers. Folgers does that.


Thats right, its the same overhere (Netherlands) after sampling the raw coffee’s you get delivered the same beans as the samples.
Never ever had any complaints about the quality.
The only thing I could imagin that this maybe has done for the homemarket of the coffee prucing countries.

Kyle Freund

Key thing to realize is that this is a commissioned study to demonstrate this tool – this is not reflecting the actual amount of defects, but that soon you can pay to find them using the test they’re hawking.

Plus, why does it always come back to blaming producers and coffee shortage driving up prices on poor consumers? Maybe it’s time to start paying what it’s worth to actually produce coffee and take care of families… to my mind, this isn’t fraud when it happens – you get what you pay for as Andy notes.

James Vaughn

This story has been going around in the news recently. While the headlines tend to be pretty catchy and alarming by design, the articles purposefully play down or leave out critical info that clarifies the actual scope- which is not much. If you follow the links to the original American Chemical Society press release (about three clicks) there is a bold, italicized paragraph right at the top which describes that the test is done ONLY on roasted and ground coffee, that is ONLY commercially available inside Brazil.

The leading statement of the original press release from the academy goes out of out it’s way to say the test has nothing to do with the US, any other country.

That’s some significant info to play down, or leave out in the flurry of articles in the news. Plus, the sheer number of articles give the impression of something on the scale of a Zombie apocalypse.

In the first paragraph of the original press release it’s stated that, “a highly accurate test is in the works.” Kind of a letdown if you have been lead to think, through reporting on reporting, that your local shop is pouring corn husks into your coffee. “Hiding” there, ominously.

Even the graphics that accompany the ACS press release misleads. “Common Filler Ingredients In Ground Coffee.” Well… No. Only common for a subset of Corproration(s), within Brazil, who are producing ground coffee, that was tested by these researchers, and funded by the Government of Brazil.

Probably a pretty cool test, but positioning it in the context of alarming news, in a huge industry and reporters running with it in that spirit, not cool.

Some, but not all, press release are designed to sell you something. Paragraph #2 was the Call To Action, come to the annual ACS exposition and hear the lecture about coffee adulteration. If they meant to get the world out about the lecture, they did. Kind of.

Roberto Devienne

Again this matters in on the news of this magazine and seems there a 2nd intention to depreciate the coffee quality in Brazil, we have control from institute that can check the coffee quality. I do not know to what coffee producer this add is directed, but this happens in others countries in South, central America, Mexico and even in Asia too.
As far I am concerned some buyers requires to low price from coffee producers countries that they require very low grade coffee beans to be used. If in internal market this has to be revised as this is several times someone wants to depreciate Brazilian coffee.

stephane mahieu

Author need to understand how works the coffee industry. As mentionned above, it is not harvested roasted and grounded. It’s a raw material, foreign matter, defect beans and above standard moisture are natural. It then need to be milled into a variety of grades ranging from premium to low grade – some with 3%+ foreign matter – there is a market for everything. Tolerances are written in all contracts from farmer, middleman, miller, exporter to roaster. Samples are analysed in minutes. Prices are adjusted accordingly. Where is the fraud ?

Roberto Devienne

I believe James Vaugan is against coffee producers in Brazil as again he blamed about adulteration in coffee from Brazil and what about other countries.How he can prove that the coffee is adulterated. Remember even companies froom cis countries poor and even from singapore I have heard required not 100& coffee on the blends of instant coffee. so please stop to jeopardize Brazil.


There is an excuse for putting anything into ground coffee and it costs less -although thats what you get when you buy a tin of Folgers or Tasters Choice or Moretto or Kirkland brand from the Costco or the local drugstore. Thats if you want the bulk tin for only a few dollars yet that sits in any conditions and how the user will store it and where will probably make a weak cup


If ever you had a cup of coffee at a Tim Hortons or a Starbucks or a McDonalds they probably used the preground sort. Lots of Americans veer away from dark roast coffees since the pre ground ones are often easy to blend anything into and often end up tasting a way other than they should

In more professional coffee roasting shops – it is compulsory for them to serve coffee that was grounded from whole bean form before serving and not to buy packs of ready ground coffee which is often the case in conventional restaurants and cafeterias

saritt staff

In order not to be deceived, you need to buy coffee only from reliable suppliers, and in general, before buying you need to find and view information about ground coffee. Not so long ago, I found on the Internet the article MyFriendsCoffee and made my choice. By the way, my coffee has no impurities and tastes great.

Liars gotta lie

Found a piece of laquored, stained wood in my Aldi ground coffee today, Was about an inch long. Been drinking this stuff for years.. How much wood slivers, that were smaller, and what else has been ground up, and passed off as 100%real coffee?
Their brand is Beaumont… what a scam. Can only imagine the long term effects on my body. Shameful.

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