BREAKING NEWS
Source: Thailand Medical News  Dec 05, 2019  3 years ago
Study Shows Hair Dyes and Hair Straightening Chemical Treatments Increases Breast Cancer Risk
Study Shows Hair Dyes and Hair Straightening Chemical Treatments Increases Breast Cancer Risk
Source: Thailand Medical News  Dec 05, 2019  3 years ago
A recent study conducted by scientists from the US National Institute of Health found that females who use permanent hair dye and chemical hair straighteners have a higher risk of developing breast cancer than women who don't use these products.



The study published online Dec. 4 in the International Journal of Cancer and shows that breast cancer risk increased with more frequent use of these chemical hair products.

Utilizing data from 46,709 women in the Sister Study, researchers at the National Institute of Environmental Health Sciences (NIEHS), part of NIH, found that women who regularly used permanent hair dye in the year prior to enrolling in the study were 9% more likely than women who didn't use hair dye to develop breast cancer. Among African American women, using permanent hair dyes every five to eight weeks or more was associated with a 60% increased risk of breast cancer as compared with an 8% increased risk for white women. The research team found little to no increase in breast cancer risk for semi-permanent or temporary hair dye use.

Dr Alexandra White, Ph.D., head of the NIEHS Environment and Cancer Epidemiology Group and corresponding author told Thailand Medical News via a phone interview, "Researchers have been studying the possible link between hair dye and cancer for a long time, but results have been inconsistent. In our study, we see a higher breast cancer risk associated with hair dye use, and the effect is stronger in African American women, particularly those who are frequent users."

An intriguing finding was the association between the use of chemical hair straighteners and breast cancer. Dr. White and colleagues found that women who used hair straighteners at least every five to eight weeks were about 30% more likely to develop breast cancer. While the association between straightener use and breast cancer was similar in African American, White women and Asian women, hair straightener use was much more common among African American women.

Dr Dale Sandler, Ph.D., chief of the NIEHS Epidemiology Branch and coauthor, cautioned that although there is some prior evidence to support the association with chemical straighteners, these results need to be replicated in other studies.

Dr Sandler, when  asked if women should stop dyeing or straightening their hair,said, "We are exposed to many things that could potentially contribute to br east cancer, and it is unlikely that any single factor explains a woman's risk. While it is too early to make a firm recommendation, avoiding these chemicals might be one more thing women can do to reduce their risk of breast cancer."

Reference : Carolyn E. Eberle et al, Hair dye and chemical straightener use and breast cancer risk in a large US population of black and white women, International Journal of Cancer (2019). DOI: 10.1002/ijc.32738
 

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