Personal use of permanent hair dyes and cancer risk and mortality in US women: prospective cohort study.
Yin ZhangBrenda M BirmannJiali HanEdward L GiovannucciFrank E SpeizerMeir J StampferBernard A RosnerEva Susanna SchernhammerPublished in: BMJ (Clinical research ed.) (2020)
No positive association was found between personal use of permanent hair dye and risk of most cancers and cancer related mortality. The increased risk of basal cell carcinoma, breast cancer (estrogen receptor negative, progesterone receptor negative, hormone receptor negative) and ovarian cancer, and the mixed findings in analyses stratified by natural hair color warrant further investigation.