Is it safe to dye your hair while pregnant?
Good news: most research says hair dye is fine — but pregnancy can change how your hair takes colour.
Medically reviewed by Dr. Christopher Sterling, obstetrician ·
The short answer
Most research suggests it’s safe to dye your hair while pregnant, as the chemicals aren’t highly toxic and very little is absorbed. Many people wait until after 12 weeks as a precaution. Work in a ventilated room and do a strand test first.
Why it matters
Only a very small amount of hair dye is absorbed through the scalp, and studies haven’t shown it harms a developing baby.
Pregnancy hormones can change your hair’s texture and how it reacts to colour, so results may be unpredictable — and your skin may be more sensitive.
Highlights, where dye goes on the hair and not the scalp, reduce absorption even further. Semi-permanent vegetable dyes such as henna are another option.
What to do
- Consider waiting until after 12 weeks.
- Do a patch test and a strand test even with your usual colour.
- Wear gloves, keep the room ventilated and don’t leave dye on longer than needed.
Common questions
Is bleaching hair safe during pregnancy?
The same reasoning applies: very little is absorbed. Ventilation helps with strong fumes.
Sources
Medically reviewed by Dr. Christopher Sterling, obstetrician, on against the sources above. Guidance can differ between countries — always follow the advice of your own midwife, doctor or pharmacist. Medical disclaimer.
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