Cancer Among Women Using Hair Dye
No Risk of Cancer Among Women Using Hair Dye
A study by Harvard researchers confirms that there is no association between the use of permanent hair dye and risk of blood-based cancer, e.g., lymphomas, leukemias and multiple myeloma.The findings, reported in the Oct. 4 issue of the Journal of the National Cancer Institute, are based on the Harvard Nurses' Health Study, a large prospective study of 121,7000 women concerning the effects of diet and lifestyle on health.
Francine Grodstein, research associate in medicine at the Harvard School of Public Health, and lead author of the study said:
"Increasing worry concerning a possible link between cancer and use of hair dye motivated us to examine this issue using Nurses' Health Study data. Since the largest number of blood-based cancer cases in our group were non-Hodgkin's lymphoma, we carefully examined whether there was any relationship to age at first use, duration, frequency and time since first use."
"We found no evidence of an association. Even among women who began hair dye use 20 or more years in the past, there was no effect of permanent hair dye use on their risk of non-Hodgkin's lymphoma."
These findings contrast with a previous large study that found no association between overall cancer mortality and hair dye use but found a suggestion of an increased risk of blood-borne cancer among some hair dye users.
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