Mould Testing in Coffee & the Rise of “Healthy Coffee”: What the Science Really Says

Questions about mould, mycotoxins, and the supposed health benefits of “mould-free” or “healthy” coffee have surged in recent years. Social media has amplified fears about hidden toxins in everyday coffee, while certain brands have built entire marketing strategies around promising “clean,” “mould-tested,” or “health-boosting” brews.

But what does the science say? And is there really anything to worry about?

This is an EXCELLENT video from the legend James Hoffman, but if you fancy reading about the subject, we've also done a niffy round up below!

Let’s break down the facts, the regulations, and the hype — and explain why specialty coffee is already safe, clean, and naturally rich in antioxidants, no extra marketing needed.

1. What Are Mycotoxins — and Should Coffee Drinkers Be Worried?

Mycotoxins are naturally occurring compounds produced by certain fungi, most commonly Aspergillus species. The two mycotoxins most often discussed in coffee are ochratoxin A (OTA) and aflatoxins. They can form on agricultural crops when they are poorly processed or improperly stored, particularly in warm, humid climates.

Crucially, mycotoxins form only on green (unroasted) coffee beans, not on roasted coffee. Multiple studies confirm that roasting reduces mycotoxin levels dramatically — in some cases by up to 90% (FAO/WHO Joint Expert Committee on Food Additives, 2001).

A study published in Food Control found that typical roasting conditions “significantly reduce OTA, often to below detectable limits,” reinforcing that the roasting process itself is a powerful safety barrier.

So even before considering regulations, roasted specialty coffee already sits well below safety thresholds.

2. EU & UK Coffee Regulations: Why Mycotoxin Testing Is Already Built In

Here’s the part many consumers don’t realise:

Under EU law (Regulation EC 1881/2006), coffee cannot enter the market unless it meets strict mycotoxin limits.

This includes legally defined maximum levels for ochratoxin A. These tests happen at the import and regulatory level long before a roastery or subscription service ever handles the beans.

This means:

• roasters cannot legally buy coffee with elevated mycotoxins

• subscription companies cannot bypass these safety checks

• repeating the same tests adds no additional protection

In other words, if coffee is available for sale in the UK or EU, it has already passed stringent food-safety testing.

The European Food Safety Authority (EFSA) has repeatedly stated that OTA levels found in roasted coffee on the EU market are typically very low and “do not pose a health concern for consumers.”

So when brands claim “we test for mycotoxins,” they are typically highlighting a process that is already mandatory — not offering something unique.

3. Why Specialty Coffee Has an Even Lower Risk

Specialty-grade coffee — the type we source at RISE — undergoes more selective harvesting, better drying, and higher-quality storage than commodity coffee. This alone reduces mould risk substantially.

Independent research (including studies in Journal of Agricultural and Food Chemistry) shows specialty coffee almost always contains significantly lower mycotoxin levels than commercial supermarket coffee.

A few key reasons:

• Hand-picked ripe cherries mean fewer damaged beans

• Raised-bed drying prevents moisture accumulation

• Smallholder farmers rarely use synthetic pesticides due to cost, meaning the coffee is often effectively organic

• Fresh roasting and rapid shipping minimise the time for any contamination to occur

We’ve seen this ourselves on farms we work with in Costa Rica and Uganda — minimal chemical input, careful processing, and meticulous storage.

The result?
Extremely low mycotoxin risk before the coffee even leaves origin.

4. Is “Mould-Free Coffee” a Real Thing — or Just Marketing?

The rise of “mould-free,” “mycotoxin-tested,” and “health-boosted” coffee brands has coincided with a wider wellness trend that suggests everyday foods are secretly harmful. This often creates fear where none is warranted.

Here are the facts:

• Roasted specialty coffee rarely contains detectable mould spores

• Roasting destroys mould

• EU import testing prevents high-risk lots from entering the market

• Independent studies consistently show negligible mycotoxin levels in specialty beans

So when a brand highlights mould testing, they are often:

• reframing standard regulatory practice as a unique selling point

• implying competitors are unsafe (they aren’t)

• leveraging fear-based marketing to build trust

This doesn’t make them “bad.” It simply means the added testing isn’t providing additional safety.

The reality:
Specialty coffee in the EU is already mould-free in any meaningful sense.

5. The Rise of “Healthy Coffee” — and Why All Specialty Coffee Is Already Healthy

Another trend gaining traction is “healthy coffee”: brews marketed as antioxidant-rich, polyphenol-boosting, gut-friendly, or “cleaner” than standard coffee.

But here’s the truth:

All specialty coffee naturally contains high levels of antioxidants, polyphenols, and bioactive compounds — no special processing required.

Peer-reviewed research supports this:

• A 2019 review in Antioxidants found that coffee is one of the richest dietary sources of polyphenols in the Western diet.

• Chlorogenic acids (CGAs), abundant in specialty Arabica coffee, have been linked to anti-inflammatory and metabolic benefits.

• A meta-analysis in European Journal of Nutrition concluded that regular coffee consumption is associated with a reduced risk of cardiovascular disease, type 2 diabetes, and certain cancers.

Light-to-medium roasts (typical in specialty coffee) retain the highest antioxidant levels, meaning the average bag from an independent roastery is already “healthier” than supermarket dark roasts.

So what about brands claiming “extra antioxidants,” “clean coffee,” or “health-enhanced coffee”?

Often, they are:

• relabelling natural coffee compounds as proprietary features

• suggesting their beans are “cleaner” than others (they aren’t)

• capitalising on wellness trends rather than offering something new

Specialty coffee is, by design, one of the cleanest, most nutrient-dense versions of coffee available.

You don’t need a “superfood coffee” label to enjoy these benefits.

6. So, Should You Worry About Mould in Your Coffee?

In short: No.

If your coffee is:

• specialty-grade

• roasted recently

• sold legally in the UK or EU

…then it has already cleared all the safety barriers necessary to ensure low mycotoxin levels.

Coffee companies that emphasise mould testing aren’t selling unsafe products — they’re selling reassurance.

But reassurance isn’t the same as scientific necessity.

7. What We Do at RISE to Ensure Safe, High-Quality Coffee

Instead of chasing hype, we focus on what genuinely matters:

✔ Partnering with reputable, independent specialty roasters

They source ethically, process carefully, and roast expertly.

✔ Ensuring proper sourcing, drying, and storage at origin

Quality always starts on the farm.

✔ Delivering freshly roasted coffee quickly

Fresh coffee is naturally inhospitable to mould.

✔ Transparent curation

We only select coffees we’ve vetted and believe in.

If you ever have questions about the science, safety, or sourcing behind your coffee, we’re always here to talk openly.

Final Thoughts

Mould-free coffee. Healthy coffee. Super-clean coffee.
These trends reflect consumers’ desire to make informed choices — which is a good thing.

But the science is clear:

• EU regulations already ensure coffee is safe

• specialty roasting eliminates meaningful mould risk

• all specialty coffee is naturally rich in antioxidants and polyphenols

• extra mould-testing claims are mostly marketing, not necessity

Great specialty coffee is already clean, healthy, and delicious — no hype required.