Is it safe to eat mycotoxin-contaminated peanuts and corn regularly?

What's actually in it

Mycotoxins are toxic metabolites from mold, most commonly aflatoxin, fumonisin, ochratoxin, and zearalenone. They contaminate peanuts, corn, wheat, coffee, dried fruits, and some spices. Warm, humid storage conditions promote mold growth and mycotoxin production. Unlike bacterial toxins, mycotoxins often aren't destroyed by cooking.

Chronic low-dose mycotoxin exposure is documented to increase cancer risk, especially liver cancer.

What the research says

A 2026 review in J Biochem Mol Toxicol on foodborne mycotoxins as molecular and epigenetic carcinogens mapped the biochemical mechanisms. Mycotoxins act through DNA damage, epigenetic changes, and immune suppression. Regular consumption of contaminated foods measurably increases cancer risk.

For lower mycotoxin intake: buy peanuts and corn products from brands with testing programs (many US-sold peanut butters meet FDA limits well below the legal threshold). Store grains and nuts in cool, dry conditions. Discard any with visible mold (including the surrounding product). For coffee, lighter roasts from reputable brands tend to have lower mycotoxin than cheap or poorly stored coffee. Mediterranean-diet approach with varied grains and legumes spreads any single-food contamination.