Can triazole fungicide residues on fruits and grains damage your DNA?

What's actually in it

Triazole fungicides are among the most widely used crop chemicals in the world. They protect fruits, vegetables, grains, and nuts from fungal diseases. Names you might see on testing reports include tebuconazole, propiconazole, and epoxiconazole. Residues stay on the food after harvest. Washing helps but doesn't remove all of it. You eat small amounts with every non-organic meal.

What the research says

A 2026 wide-ranging review in Mutagenesis examined all available animal studies on triazole fungicides and DNA damage. The pattern was clear: triazoles cause genotoxicity, meaning they damage the genetic material inside cells.

The main mechanism is oxidative stress. Triazoles trigger a flood of reactive oxygen species that overwhelm the cell's defenses and directly attack DNA strands. The review found evidence of chromosome breaks, micronuclei formation, and DNA strand breaks across multiple triazole compounds and multiple animal species.

DNA damage doesn't always cause immediate illness. But over time, accumulated damage increases the risk of cancer and reproductive problems. Some triazoles also disrupt hormones by blocking enzymes that process estrogen and testosterone. Buying organic for the most heavily sprayed produce, like apples, grapes, and wheat products, is the most effective way to cut your exposure.