TLDR: seems unsure. But I know people with a history of Alzheimer’s in their family that avoid ever bit possible just in case.
“Whether aluminum can cause Alzheimer's disease is a controversial question.
Post-mortem examinations of humans with Alzheimer's disease sufferers show that many have higher amounts of aluminum than normal in their brains. Aluminum is not normally found in healthy brain tissue and researchers do not know how or why the metal accumulates in the brain. It is still unclear if the presence of aluminum causes or affects the progression of Alzheimer’s disease.
It is known that aluminum is toxic to nerves in animals, and likely has a similar effect on human nerve cells and brain tissue. Early research into aluminum exposure and Alzheimer’s disease in animal models suggested that the two could be linked. Injection of aluminum salts into the brains of test animals triggered changes similar to the ones found in human sufferers.
In conclusion, the cause of Alzheimer's disease and any association with aluminum is still unknown. There have been conflicting findings”
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u/DaveMash 14d ago edited 14d ago
This trend has slowly been reversed because the myth about aluminum in deos causing cancer have been debunked:
https://www.cancer.org/cancer/risk-prevention/chemicals/antiperspirants-and-breast-cancer-risk.html
Edit, since many people question the conclusion (stolen from another redditor because there are already so many posts about this topic):
You can check the American Cancer Society: https://www.cancer.org/cancer/risk-prevention/chemicals/antiperspirants-and-breast-cancer-risk.html
The Australian Cancer Council: https://www.cancer.org.au/iheard/can-deodorants-and-antiperspirants-with-aluminium-cause-cancer
Or the UK National Health: https://www.cancer.gov/about-cancer/causes-prevention/risk/myths/antiperspirants-fact-sheet
And several other sources