Can cadmium and lead in rice and wheat increase your cancer risk?
Yes. A risk assessment found that dietary cadmium and lead from rice and wheat consumption exceed safe levels for cancer risk in many populations.
What's actually in it
Cadmium and lead are naturally present in soil, and crops absorb them as they grow. Rice and wheat are particularly good at accumulating these metals. The amounts vary by region and farming practices, but they're present in nearly every sample tested worldwide.
You can't wash or cook the metals out. They're inside the grain itself.
What the research says
A 2026 study in Ecotoxicol Environ Saf assessed the health risk of cadmium and lead exposure from eating rice and wheat. They compared dietary intake levels to cancer risk benchmarks.
For populations that eat rice or wheat as a staple, daily cadmium intake from these grains exceeded safe cancer risk thresholds. The risk was highest for people who eat large amounts of rice daily.
Lead levels were lower but still contributed meaningfully to cumulative exposure, especially for children who eat proportionally more grain relative to body weight.
Varying your grains helps spread the risk. Rotating between rice, oats, quinoa, and other grains reduces your exposure to any single contaminant. Choosing rice grown in less contaminated regions can also help.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Risk assessment of dietary exposure to cadmium and lead through wheat and rice consumption. | Ecotoxicol Environ Saf | 2026 |
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