Common Chemical NDMA May Pose Higher Cancer Risk to Children: Study

A common environmental chemical may hit children far harder than adults-right down to their DNA.

A new study from Massachusetts Institute of Technology has revealed that N-Nitrosodimethylamine (NDMA), a contaminant found in some medications, processed foods, and polluted drinking water, could pose a significantly greater cancer risk to children than adults.

Published in Nature Communications, the research used mouse models to explore how NDMA affects the body at different ages. Both juvenile and adult mice exposed to the chemical showed similar initial DNA damage. However, what happened next was strikingly different.

In young mice, the damage triggered a cascade of harmful effects. As their cells rapidly divided—a normal part of growth—the DNA damage evolved into double-strand breaks, leading to mutations and, eventually, cancers such as liver tumors. In contrast, adult mice, whose liver cells divide far more slowly, showed minimal progression from damage to mutation and did not develop significant tumors under the same conditions.

The key factor appears to be cell proliferation. Rapidly growing tissues in children create more chance for damaged DNA to be incorrectly repaired, increasing cancer risk.

Importantly, researchers caution that adults are not immune. Conditions that increase cell turnover—such as liver inflammation, high-fat diets, or alcohol use—could make adult tissues more vulnerable to NDMA’s harmful effects.

Ultimately, the findings reinforce a crucial message: age matters when assessing environmental risks. Identifying and regulating harmful exposures early could play a vital role in preventing cancer before it starts—especially in the most vulnerable populations.

REFERENCE: Volk, L. B., et al. (2026). Early life exposure to N-nitrosamine drives genotoxicity, mutagenesis, and tumorigenesis in DNA repair-deficient mice. Nature Communications. DOI: 10.1038/s41467-026-71753-w. https://www.nature.com/articles/s41467-026-71753-w.