Does Heavy metals in food cause infertility?

Established. A link with fertility is documented by numerous, converging human studies, endorsed by health authorities. Direct toxicity to reproductive cells and to the hormonal axis; lead is a recognized reproductive toxicant.

Heavy metals in food

Mercury, cadmium, lead

Evidence level : Established KitchenMechanism : Environmental / physical burden

🟢 A link with fertility is documented by numerous, converging human studies, endorsed by health authorities.

Where it's found: Large predatory fish (tuna, swordfish), offal, tobacco (cadmium), and tap water passing through old pipes (lead, copper).
Suspected mechanism: Direct toxicity to reproductive cells and to the hormonal axis; lead is a recognized reproductive toxicant.
Suggested alternative: Vary the fish you eat and favor smaller species (sardine, mackerel): good nutritional intake, less mercury.
Source: ANSES (French agency for food, environmental and occupational health safety), fish and methylmercury exposure; WHO (lead).

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Related factors

Including a factor does not mean it causes infertility: it is simply worth monitoring, depending on its level of evidence.

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Content last updated: September 14, 2026