Medical Q&As

Dyed hair - safe in pregnancy?

Is it safe to have your hair dyed or highlighted while pregnant? Iíve heard that the chemicals used can be harmful to the baby.

There have been a number of studies that have attempted to answer the question you pose. Some animal studies have shown that some of the chemicals contained in hair dye are potentially harmful however, the doses that the test animals were exposed to were extremely high and way in excess of the doses that would normally be used by women dying their hair. Some of the hair dye can be absorbed into the bloodstream but again the doses involved are extremely low. On the balance of probability it is reasonable to say that dying your hair during pregnancy is not likely to be harmful to the foetus.