Women who regularly use deodorants containing aluminium salts could risk developing breast cancer, a new Swiss study warns.
Initial tests on isolated mammary cells derived from a normal human gland were later replicated in studies on mice, and the results were the same: long-term exposure to concentrations of aluminium caused cells to form tumours and metastasise.
“I think we should avoid all deodorants containing aluminium salts,” co-author André-Pascal Sappino told The Local.
“And it’s very difficult to be sure that the so-called ‘without aluminium’ brands really are without,” added the oncology professor from the University of Geneva.
Sappino said the team's earlier research was treated with scepticism, but mounting evidence meant it was much easier to get published this time.
For now, aluminium salts were a "suspect, not yet convicted", said the professor, who drew an analogy with asbestos, the use of which is banned in Switzerland and the European Union.
“Asbestos is cheap, has very attractive industrial potential, and it took 50 years to ban it. We hope it doesn’t take so long to ban aluminium salts,” said Sappino.
Like asbestos, aluminium is not detectably mutagenic in bacteria, but subcutaneous injections of aluminium salts in mice resulted in “very aggressive tumours”.
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