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Should we fear cadmium? Comments from Mathieu Leduc

Published: 30 June 2025

French doctors are raising the alarm about rising exposure to cadmium, a toxic heavy metal found in phosphate fertilizers. Cadmium is a known carcinogen linked to kidney damage, bone disease, and other long-term health issues, even at low doses. French doctors are urging France's government to tighten fertilizer regulations to reduce this public health risk.

What about in Quebec?

Ìýthat Quebecers shouldn't worry about cadmium exposure yet—cadmium levels are declining in the Canadian population and Canada's standards governing cadmium content inÌýfertilizers are more conservative.

In addition, agronomistÌýMathieu Leduc, a lecturer at ɬÀï·¬'s Farm Management and Technology program, toldÌýLa Presse that aÌý"significant proportion" of soil phosphorus enrichment is now done using manure, which "generally contains fewer heavy metals." He added that large farms must be assessed for phosphorus annually, which prevents overuse of these fertilizers.

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