| Women want the dye to be present on the hair, but | | | | four times a year had a greater risk to develop |
| not on the scalp. Among women with other slow | | | | ovarian cancer. Women who smoke and use |
| genes (the "CYP1A2 slow" phenotype), exclusive | | | | permanent hair dyes have an even higher risk of |
| permanent hair dye use was associated with a | | | | cancer. |
| 2.5-fold increased risk. | | | | More studies might look at the risk of cancer from |
| Large epidemiological studies show no elevated health | | | | exposure to hair dye at work, which the researchers |
| risk for women using hair dyes. Now, an equally | | | | excluded from this analysis. For hematopoietic cancers, |
| important part of the study is those women who were | | | | studies found a slightly increased risk of cancer in |
| not at increased risk despite using the hair dye. It state | | | | people who had used hair dye. For bladder cancer and |
| that women who used permanent hair dye once a | | | | breast cancer, the results indicate that there was no |
| month had a 25% higher rate of bladder cancer. | | | | effect of hair dye use on cancer risk. |
| Women who dye their hair might be different from the | | | | Risk of salivary cancer increased three times in hair |
| average woman in many ways. Those women have | | | | dye users and risk of brain and ovarian cancer almost |
| turned to at home hair dye kits. I heard of women | | | | doubled. Personal use of hair dyes and risk of cancer: |
| going bald from over-dyeing their hair, or braiding it. The | | | | a meta-analysis. The researchers found no strong |
| study of 1,300 women claims that those who started | | | | evidence of a link between personal hair dye use and |
| dyeing their hair before 1980 were one-third more likely | | | | an increase in cancer risk. But researchers have not |
| to develop NHL. The researchers did not find any | | | | been able to find a clear link between using hair dye |
| larger risk of cancer in women who started using hair | | | | and cancer risk, including the risk of breast cancer. |
| dye later than 1980. The exception was women who | | | | Take-home message. This study supports previous |
| used black hair dye for more than 20 years. Another | | | | research that found no link between hair dye use and |
| study found that women who dyed their hair one to | | | | increased risk for breast cancer. |