Alan Palmer is the author of the more than 500-page report in RCook's link. I don't have time to read it, but I found a short video of him on the interwebz.
He talks about the link between alumin(i)um exposure and Alzheimer's at ~6:15. According to Alan Palmer the link is well established.
This is the Alzheimer Society's take on it from
https://alzheimer.ca/en/Home/About-dementia/Alzheimer-s-disease/Risk-factors/Aluminum
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Is there a connection between aluminum and the development of dementia?
Aluminum has been studied for over 40 years as a substance that might be linked to dementia. However, there have been many conflicting findings.
- Some studies show increased levels of trace elements of aluminum in the brains of people with dementia, while others do not.
- Studies have not found an increased incidence of dementia in people with occupational exposure to aluminum.
- Tea is one of the few plants whose leaves accumulate larger trace element amounts of aluminum that can seep into the brewed beverage. However, there is no evidence that dementia is more prevalent in cultures that typically drink large amounts of tea.
- Unfortunately, earlier animal studies focused on one animal that is particularly susceptible to aluminum poisoning, which has led to incorrect conclusions about the general effects of aluminum on the body.
Current research provides no convincing evidence that exposure to trace elements of aluminum is connected to the development of dementia.
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If alumin(i)um is strong a strong risk factor for Alzheimer's I'd expect it to be epidemic in populations near alumin(i)um smelters. The evidence, however,...
To be honest, I'd be more concerned about exposure to heavy metal, bands such as Poison and White Snake. That causes serious often irreparable damage.
Joe
P.S. He mostly side stepped the audience question (~1:15) about 5G and contrails, but that ought to give some insight into the people who lap this up uncritically.