Moldy foods like coffee, grains, and dried fruits can contain mycotoxins such as aspergillus, fusarium, or fumonisins.

“Moldy foods can contain aspergillus or other things like, um, fusarium or fumonisins. Uh, I talked about this in my book, The Carnivore Code. This is one of the concerns I have about things like coffee and grains, which can be very moldy. Thankfully, if you drink coffee, I'm not a fan, you guys all know that, there are many companies now that make lower mold coffees but if you want to drink coffee or you're going to eat grains, against the advice that I give, um, know where those are coming from and realize that anything in the bulk section of the supermarket, anything dried, any dried fruit, these could all be moldy and have mold toxins.”