Coffee beans are seeds that spend months in transit and storage, creating conditions for mold growth. A 2024 review of over 3,000 samples found the mycotoxin ochratoxin A in 54.6% of them, meaning more than half of coffee on the market may contain this toxin.
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Your coffee could contain toxins produced by mold, and you'd have absolutely no idea. Here's something most people don't know. Coffee is a fruit. What we call the bean is actually the seed inside of a coffee cherry. That fruit gets picked, processed, dried, stored, put into bags, transported, stored again, and then it's roasted, and eventually it ends up in your kitchen. So you've got an agricultural product plus moisture plus storage plus time. What can grow under the wrong conditions? Mold. And certain molds produce toxins. Those toxins are called mycotoxins. A 2024 systemic review looked at more than 3,000 coffee samples. A toxin produced by mold called ochratoxin A was detected in 54.6% of them, more than half.