According to Gram Research analysis of FDA data, ochratoxin A—a naturally occurring mold toxin—is present at safe levels in 96.5% of U.S. food samples tested between 2008 and 2022. When detected, contamination appeared most in green coffee beans, dried fruits, grain products, and spices, but even these foods rarely exceeded safe thresholds. The highest level found was 116 micrograms per kilogram, indicating that American food supplies are well-protected from this invisible mold toxin.
The U.S. Food and Drug Administration tested over 3,700 food samples between 2008 and 2022 to check for ochratoxin A, a naturally occurring toxin produced by mold that can grow on crops like coffee beans, dried fruits, and grains. According to Gram Research analysis, the good news is that 96.5% of samples had toxin levels so low they were barely detectable. When toxins were found, they appeared most often in green coffee beans, dried fruits, grain products, and spices. This long-term monitoring helps the FDA understand how common this invisible threat really is and whether new safety rules are needed.
Key Statistics
An FDA analysis of 3,700 food samples collected between 2008 and 2022 found that 96.5% had ochratoxin A levels below detectable limits, with the highest contamination appearing in green coffee beans, dried fruits, and grain products.
According to a 14-year FDA surveillance study published in 2026, the maximum ochratoxin A level detected in any food sample was 116 micrograms per kilogram, with the vast majority of contaminated samples remaining far below this threshold.
A 2026 FDA regulatory monitoring study of 3,700+ food samples showed that green coffee beans, dried fruits, grain products, and spices accounted for the highest detection rates of ochratoxin A, though contamination remained rare across all tested foods.
The Quick Take
- What they studied: How much of a naturally occurring mold toxin called ochratoxin A is actually present in American food supplies, especially in foods like coffee, dried fruits, and grains.
- Who participated: The FDA collected and tested 3,700+ food samples from 2008 to 2022 as part of their regular food safety monitoring program. Samples came from foods known to be at higher risk for mold contamination.
- Key finding: Nearly all food samples (96.5%) had toxin levels so low they were barely measurable. The highest contamination was found in green coffee beans, dried fruits, grain products, and spices, but even these were generally safe.
- What it means for you: Your everyday foods are unlikely to contain harmful levels of this mold toxin. However, continued monitoring helps ensure food safety stays strong. If you’re concerned about specific products, the FDA continues to test and track these levels.
The Research Details
The FDA runs a special program each year to check foods for mold toxins. Scientists collect samples of foods that are most likely to have mold problems—like coffee beans, dried fruits, and grains—and test them in laboratories. Between 2008 and 2022, they tested over 3,700 samples this way. They measured how much of a specific mold toxin called ochratoxin A was in each sample, from zero (not detectable) up to 116 micrograms per kilogram (a tiny amount by weight).
This type of study is called a surveillance program, which means it’s designed to watch and track a problem over time rather than test a new treatment. The FDA does this work every single year to make sure the food supply stays safe. By collecting data over 14 years, scientists can see patterns—like which foods have more contamination and whether the problem is getting better or worse.
The researchers used very sensitive laboratory equipment that can detect even tiny amounts of the toxin. They set detection limits (the smallest amount they can reliably measure) between 0.21 and 24.9 micrograms per kilogram depending on the food type.
This type of long-term monitoring is important because mold toxins can’t always be seen or tasted, but they can affect health if people eat too much of them over time. By testing thousands of samples year after year, the FDA can spot trends early. If contamination started getting worse, they would know and could take action. This data also helps the FDA decide whether to set official safety limits for ochratoxin A in the United States, similar to limits that already exist in other countries.
This study is reliable because it comes from the FDA, the official U.S. government agency responsible for food safety. The testing was done in certified laboratories using standardized methods. The large sample size (3,700+ samples) and long time period (14 years) make the findings more trustworthy than a smaller, shorter study. However, this is monitoring data rather than an experiment, so it shows what’s actually in foods but doesn’t prove what causes contamination or how to prevent it.
What the Results Show
Out of 3,700 food samples tested, the vast majority—96.5%—had ochratoxin A levels so low they were barely detectable. This is very good news for food safety. When the toxin was found at measurable levels, it appeared most often in four types of foods: green coffee beans, dried fruits, grain products, and spices.
The highest amount of toxin found in any single sample was 116 micrograms per kilogram, which is still considered a low level. Most samples that did contain detectable toxin had amounts far below this maximum. The detection limits used in the testing ranged from 0.21 to 24.9 micrograms per kilogram depending on the food type, meaning the FDA could catch even very small amounts of contamination.
These findings match what scientists have found in other countries and in other studies of ochratoxin A. The pattern is consistent: most foods are clean, but certain crops like coffee and dried fruits need more careful monitoring because they’re more likely to develop mold.
The study shows that green coffee beans (coffee before it’s roasted) had the highest contamination rates among all foods tested. This makes sense because green coffee beans are stored for long periods before processing, giving mold more time to grow. Dried fruits and grain products also showed higher contamination rates than other foods. Spices, which are dried plant materials, also appeared more frequently in the contaminated samples. These patterns help the FDA focus its testing efforts on the foods that need the most attention.
The FDA’s findings match what other countries and international organizations have found when testing for ochratoxin A. The types of foods with the highest contamination (coffee, dried fruits, grains, and spices) are the same ones flagged in studies from Europe and other regions. The overall contamination rates and levels found in this U.S. study are similar to what’s been reported elsewhere, suggesting that ochratoxin A is a consistent but manageable food safety issue worldwide.
This study shows what’s actually in foods, but it doesn’t explain why mold grows on some crops more than others or test ways to prevent contamination. The data comes from FDA testing, which focuses on foods already suspected of having mold problems, so it may not represent all foods equally. Some foods might be tested more often than others depending on FDA priorities. Additionally, the study doesn’t track whether contamination levels are changing over time or getting better or worse, though 14 years of data does provide a good snapshot of the situation.
The Bottom Line
Continue eating foods like coffee, dried fruits, and grains as part of a normal diet. The risk from ochratoxin A in U.S. foods is very low based on this FDA data. There’s no need to avoid these foods or make major dietary changes. If you’re concerned about food safety in general, buy from reputable sources and store foods properly to prevent mold growth. This recommendation has moderate to high confidence because it’s based on 14 years of FDA testing data.
Everyone who eats food should appreciate this research, but it’s especially relevant for people who consume large amounts of coffee, dried fruits, or grains. Parents concerned about their children’s food safety will find this reassuring. Food manufacturers and importers should care about this data because it helps them understand regulatory expectations. People with compromised immune systems might want to be extra cautious, though the risk remains very low.
You won’t notice any immediate changes from this research because the contamination levels are already very low. The benefit is long-term peace of mind knowing that the FDA is actively monitoring your food supply. If the FDA decides to set new safety limits based on this data, that could take months or years to implement, but it would provide even stronger protection.
Frequently Asked Questions
Is ochratoxin A in coffee dangerous?
Ochratoxin A appears in some coffee, but FDA testing of 3,700 samples found 96.5% had levels so low they’re barely detectable. The highest level found was 116 micrograms per kilogram—still considered safe. Occasional coffee consumption poses minimal risk.
What foods have the most mold toxin contamination?
Green coffee beans, dried fruits, grain products, and spices showed the highest detection rates in FDA testing from 2008-2022. However, even in these foods, contamination was rare and levels remained low. Proper storage in cool, dry places reduces mold growth naturally.
How often does the FDA test for ochratoxin A?
The FDA runs a yearly mycotoxin compliance program that samples foods susceptible to mold contamination, including ochratoxin A testing. This 14-year study analyzed over 3,700 samples collected annually, providing consistent monitoring of the food supply.
Should I stop eating dried fruits or coffee because of mold toxins?
No. FDA data shows 96.5% of samples had undetectable or extremely low toxin levels. These foods are safe to eat as part of a normal diet. The benefits of eating dried fruits and drinking coffee outweigh the minimal mold toxin risk based on current evidence.
What does the FDA do if they find high levels of ochratoxin A?
The FDA uses this monitoring data to track contamination patterns and determine whether to establish official safety limits for ochratoxin A in the U.S. Currently, there are no formal U.S. regulatory limits, but continued testing ensures the food supply remains safe.
Want to Apply This Research?
- Track your consumption of high-risk foods (coffee, dried fruits, grains, spices) weekly and note any digestive symptoms or health changes. This personal log helps you identify any patterns and provides data to discuss with a doctor if concerns arise.
- No behavior change is necessary based on this research. However, users can optimize food storage by keeping coffee beans, dried fruits, and grains in cool, dry places to naturally prevent mold growth. Set a reminder to check expiration dates on these items monthly.
- Set a quarterly reminder to review FDA food safety updates and any new guidance on ochratoxin A. Users can also track which brands and sources they purchase from, noting any recalls or safety alerts. This creates a personal food safety awareness practice without requiring dietary restriction.
This research summarizes FDA monitoring data and does not constitute medical advice. Ochratoxin A contamination in U.S. foods is rare and generally at safe levels based on this study. However, individuals with severe mold allergies, compromised immune systems, or specific health concerns should consult their healthcare provider about dietary choices. This article is for informational purposes only and should not replace professional medical guidance. Always follow FDA food safety recommendations and consult a doctor if you experience unexplained health symptoms.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.