Does Fluoride in toothpaste cause infertility?

Unconfirmed claim. A claim is circulating (social media, marketing) but available studies do not confirm it, and may even contradict it. A link to infertility circulates on social media. At the doses used in dental care, available data do not confirm it, and the benefit against cavities is well established.

Fluoride in toothpaste

Mineral used for dental prevention

Evidence level : Unconfirmed claim BathroomMechanism : Hormonal disruption burden

⚪ A claim is circulating (social media, marketing) but available studies do not confirm it, and may even contradict it.

Where it's found: Standard toothpastes, mouthwashes, fluoridated water.
Suspected mechanism: A link to infertility circulates on social media. At the doses used in dental care, available data do not confirm it, and the benefit against cavities is well established.
Suggested alternative: No change needed: simply follow the recommended dose (a pea-sized amount) and avoid swallowing it.
Source: WHO, recommendations on fluoride; EFSA (reference intake values).

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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