Researchers recently assessed the relationship between hair dye use and tumor risk and mortality.
The Nurses' Health Study included 117,200 female participants who reported no tumors during baseline testing, and over a 36-year follow-up period, participants reported information about individual use of permanent hair dyes, assessing participants' use, duration, frequency, cumulative dosage, age at first use, and so on.
end of the study was tumor and tumor death.
The risk of solid cancer other than melanoma skin cancer (n=20805, with a risk ratio of 0.98) or blood system tumours (n=1807;1.00) was not significantly increased compared to participants who never used hair dye.
In addition, the risk of death from most specific tumors in people who have used hair dyes (including skin squamous cell carcinoma, bladder cancer, melanoma, estrogen-positive breast cancer, progesterone-positive breast cancer, hormone-positive breast cancer, brain cancer, colorectal cancer, kidney cancer, lung cancer and most blood cancers) or cancer-related deaths (n=4860;0.96) has not been significantly increased.
found a slight increase in the risk of substrate cell carcinoma in people who had used it (n=22560;1.05).
is also of concern that the cumulative dose of hair dyes is associated with increased risk of estrogen-negative breast cancer, progesterone-negative breast cancer, hormone-neutral breast cancer and ovarian cancer.
the risk of specific tumors associated with hair dyes was race-related, with an increased risk of Hodgkin's lymphoma after hair dyeing in women with natural black hair (70 female patients, 24 of whom were natural brunettes), while in natural light hair color, the risk of substrate cell carcinoma was higher after hair dyeing.
study concluded that permanent hair dyes did not increase the risk of most tumor morbidity and death, but that the cumulative dose of hair dyes was associated with an increased risk of substrate cell carcinoma, partial breast cancer and ovarian cancer.