15 September 2008

What does the National Hockey League Have to do with this??

Scary Warning About Hair Dye and Cancer

"Coloring your hair may make you look younger and prettier, but a new study from Yale University in New Haven, Connecticut, may give you pause, especially if you use dark-colored hair dyes. The researchers conclude that using hair dye may increase the risk of certain types of non-Hodgkin lymphoma, a blood cancer involving the lymph nodes, confirming the findings of previous studies."

"The study: In fact, it was those previous study findings that inspired Yale researcher Dr. Yawei Zha to explore the association between hair dye and cancer, since many of those studies have had inconsistent results. Reuters reports that the Yale team pooled data from four published "case-control" studies covering 4,461 case patients who had non-Hodgkin lymphoma and 5,799 control subjects who did not. Among all the women in the study--both those with non-Hodgkin lymphoma and those without--75 percent had used hair dye at some time in their life. Among the men, 10 percent had done so. "

"The results: Among women, but not men, who started using hair dye prior to 1980, there was a 30 percent increased risk of non-Hodgkin lymphoma, compared with those who had never used hair dye. In this group, the risk was increased for non-Hodgkin lymphoma subtypes chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) and follicular lymphoma, but not other subtypes of the disease. Among women who began using hair dye in 1980 or later, the increased risk was limited to those using dark colors of dye."

"Writing in the American Journal of Epidemiology, the investigators caution that "personal use of hair dye may play a role in the risk of NHL, particularly for follicular lymphoma and CLL/SLL. Our study also indicates that although the risk associated with personal hair-dye use was observed mainly among women who started using hair dyes before 1980, the risk was not limited to those women." Future studies, they note, "are needed to examine the risk of NHL by time period of hair-dye use and by genetic susceptibility."

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