There are several studies that look at the relationship between maternal hair dyes and childhood diseases, including childhood brain tumors. Don’t expect ot find any information that praises the health benefits of hair dyeing, but you won’t find any evidence that it is particularly dangerous either.

Even though there are no studies linking hair dyes to any prenatal toxicity, many conservative doctors tell their patients to pass on going platinum until after the baby is born. The truth is that it is probably fine to get some highlights and an occasional color rinse, but you probably shouldn’t soak your head in a vat of dye nightly-plus, your hair would fall out.