trustmebro.to/r/…
✓ checked
trust me, bro:
here is the receipt.
the claim

Personal use of hair dye increases the risk of cancer.

the verdict
CONTESTED PARTIAL
Recorded sources
5 sources for · 5 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that personal use of hair dye increases the risk of cancer?

Partly. Evidence on whether personal hair dye use increases cancer risk is mixed and partial: several meta-analyses and case-control studies report modestly elevated risks for specific cancers such as bladder and breast cancer, while other large cohort and case-control studies find no overall increase in cancer risk. No single source settles the general claim across all cancers.

Verdict: CONTESTED PARTIAL · 5 sources for, 5 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5
Bladder cancer risk and personal hair dye use
2004
Get citation
Andrew, A. S., Schned, A. R., Heaney, J. A., & Karagas, M. R. (2004). Bladder cancer risk and personal hair dye use. doi.org. https://doi.org/10.1002/ijc.11729

Evidence against · 5
Personal Permanent Hair Dye Use Is Not Associated with Bladder Cancer Risk: Evidence from a Case-Control Study
2006
Get citation
Lin, J., Dinney, C. P., Grossman, H. B., & Wu, X. (2006). Personal Permanent Hair Dye Use Is Not Associated with Bladder Cancer Risk: Evidence from a Case-Control Study. doi.org. https://doi.org/10.1158/1055-9965.epi-06-0156

See more details
More for · 4
Personal Use of Hair Dyes and the Risk of Bladder Cancer: Results of a Meta-Analysis
2005
Get citation
Personal Use of Hair Dyes and the Risk of Bladder Cancer: Results of a Meta-Analysis. (2005). doi.org. https://doi.org/10.1177/003335490512000107

Does the Use of Hair Dyes Increase the Risk of Developing Breast Cancer? A Meta-analysis and Review of the Literature.
2018
Get citation
R, G., R, M., I, I., & K, M. (2018). Does the Use of Hair Dyes Increase the Risk of Developing Breast Cancer? A Meta-analysis and Review of the Literature.. doi.org. https://doi.org/10.21873/anticanres.12276

Hair chemicals may increase breast cancer risk: A meta-analysis of 210319 subjects from 14 studies
2021
Get citation
Xu, S., Wang, H., Liu, Y., Zhang, C., Xu, Y., & Tian, F. (2021). Hair chemicals may increase breast cancer risk: A meta-analysis of 210319 subjects from 14 studies. doi.org. https://doi.org/10.1371/journal.pone.0243792

Association between hair dye use and human cancers: A systematic review.
2026
Get citation
RK, G., J, M., C, N., G, B., & NA, M. (2026). Association between hair dye use and human cancers: A systematic review.. doi.org. https://doi.org/10.1016/j.jdin.2025.10.009

More against · 4
Personal use of permanent hair dyes and cancer risk and mortality in US women: prospective cohort study
2020
Get citation
Personal use of permanent hair dyes and cancer risk and mortality in US women: prospective cohort study. (2020). doi.org. https://doi.org/10.1136/bmj.m2942

Does Hair Dye Use Increase the Risk of Breast Cancer? A Population-Based Case-Control Study of Finnish Women
2015
Get citation
Heikkinen, S., Pitkäniemi, J., Sarkeala, T., Malila, N., & Koskenvuo, M. (2015). Does Hair Dye Use Increase the Risk of Breast Cancer? A Population-Based Case-Control Study of Finnish Women. doi.org. https://doi.org/10.1371/journal.pone.0135190

Hair Dye Use and Breast Cancer: a Case-Control Study among Screening Participants
1991
Get citation
Hair Dye Use and Breast Cancer: a Case-Control Study among Screening Participants. (1991). doi.org. https://doi.org/10.1093/oxfordjournals.aje.a115818

Morbidity and Mortality in 7,684 Women According to Personal Hair Dye Use: The Copenhagen City Heart Study followed for 37 Years.
2016
Get citation
S, V., SF, N., P, S., & BG, N. (2016). Morbidity and Mortality in 7,684 Women According to Personal Hair Dye Use: The Copenhagen City Heart Study followed for 37 Years.. doi.org. https://doi.org/10.1371/journal.pone.0151636

Receipt History
Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.
Check your own claim
Challenge the receipt
Requests are recorded for review. This does not start an automatic check or guarantee a response time.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work