The claim

「Never dye or perm your hair while pregnant」

Q: Never dye or perm your hair while pregnant

Partly true — Very little modern hair dye is absorbed through the scalp, and there’s no evidence of birth defects. Most guidance says "be cautious, not abstinent": wait past the first trimester, ventilate the room, and limit scalp contact. Highlights that avoid the roots are an easy compromise.

Verdict

Partly true

Very little modern hair dye is absorbed through the scalp, and there’s no evidence of birth defects. Most guidance says "be cautious, not abstinent": wait past the first trimester, ventilate the room, and limit scalp contact. Highlights that avoid the roots are an easy compromise.

Sources

NHS · UK National Health Service
NHS (UK National Health Service). (n.d.). Using hair dye in pregnancy: Is it safe?. https://www.nhs.uk/best-start-in-life/pregnancy/using-hair-dye-in-pregnancy-is-it-safe/
Direct source · Government / official agency · checked 2026-08-02

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「Never dye or perm your hair while pregnant」

Verdict

Sources

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Further reading