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the claim
Aluminum chlorohydrate in antiperspirants causes breast cancer
the verdict
OVERSTATED
true in a weaker form than the claim states
confidence 0/100

Whether aluminum chlorohydrate in antiperspirants causes breast cancer remains contested, with in vitro and some observational studies suggesting a potential link via estrogenic activity, while comprehensive reviews and safety assessments find no consistent or definitive clinical evidence of carcinogenicity.

what the evidence does support

Aluminum chlorohydrate in antiperspirants shows potential estrogenic activity in vitro and mixed observational associations, but reviews find no definitive clinical link to breast cancer.

Evidence for · 3
Use of Underarm Cosmetic Products in Relation to Risk of Breast Cancer: A Case-Control Study.
2017 · cited by 31
This case-control study found a significant association between frequent early-life underarm cosmetic product use and increased breast cancer risk.
Evidence against · 3
Systematic review of potential health risks posed by pharmaceutical, occupational and consumer exposures to metallic and nanoscale aluminum, aluminum oxides, aluminum hydroxide and its soluble salts.
2014 · cited by 241
This comprehensive systematic review concluded that there is no clear evidence showing that underarm antiperspirants increase the risk of breast cancer, and metallic aluminum salts are not proven carcinogenic.
See more details
More for · 2
Potential interference of aluminum chlorohydrate with estrogen receptor signaling in breast cancer cells
2018 · cited by 30
This in vitro study demonstrated that aluminum chlorohydrate can interfere with estrogen receptor signaling and alter gene expression in breast cancer cells.
Potential interference of aluminum chlorohydrate with estrogen receptor signaling in breast cancer cells.
2018 · cited by 22
This study confirmed that aluminum chlorohydrate induces estrogen receptor alpha activation and promotes genes related to breast cancer progression in cell lines.
More against · 2
Correlation between daily life aluminium exposure and breast cancer risk: A systematic review.
2023 · cited by 11
This systematic review noted that epidemiological data on deodorant and antiperspirant use and breast cancer incidence remain inconsistent and lack definitive causal proof.
Exploring the Potential Link between Aluminum-Containing Deodorants/Antiperspirants and Breast Cancer: A Comprehensive Review.
2024 · cited by 3
This comprehensive review highlights that while biological mechanisms and exposure are debated, existing research and clinical data do not establish a direct causal connection between antiperspirants and breast cancer.
The paper trail · every fact has a biography
first checked02 Aug 2026
judged → OVERSTATED · 002 Aug 2026
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