A Meta-Analysis on the Relationship Between Hair Dye and the Incidence of Non-Hodgkin’s Lymphoma

    December 2018 in “ Medical principles and practice ”
    Ling Qin, Hui-Yang Deng, Shengjiang Chen, Wei Wei
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    TLDR Using hair dye may slightly increase the risk of non-Hodgkin's lymphoma, especially with long-term use.
    The meta-analysis, which included 16 studies (13 case-control and 3 cohort studies), found that the use of hair dye was associated with a 14% increased risk of non-Hodgkin's lymphoma (NHL), with an odds ratio (OR) of 1.14 and a 95% confidence interval (CI) of 1.01-1.29. The risk was particularly higher in individuals who used hair dye for more than 20 pack-years. The results suggest that frequent and long-term use of hair dye may increase the risk of NHL, especially in females, and imply that minimizing exposure to hair dye could help prevent NHL.
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