The possible link between Alzheimer's and aluminum was made almost 35 years ago. It was about that point in my life when underarm deodorant became a part of my daily hygiene. I noticed that my dad used RightGuard anti-perspirant spray with aluminum chlorhydrate. It struck me as kind of stupid to spray an aluminum compound into the air where it could contact the nasal membranes and have a pretty direct shot at the brain.
Fast forward to December 2003. My dad passed on. He had been showing signs of Alzheimer's or Parkinson's for a couple years. His gait shifted to shuffling. His penchant for balancing the checkbook and income to the penny every month gave way to forgetting to pay critical bills. He became agitated and mean for no reason, yet would be unaware of his uncivil behavior some time later. He "lost" his eyeglasses in the trashcan. Is there a connection? There is no history of any senile dementia on either side of his family. Most live to ages 80 to 105. He passed at 73.
It may not have only been the aluminum chlorhydrate in anti-perpspirants. When our parents were growing up, in the Depression years, cookware was made of aluminum. I wouldn't be surprised if some of it didn't leach into the foods. We had aluminum cookware for a short time when we were little, but Mom switched to stainless steel cookware as soon as it became available.
It will be curious to see if the levels of adults with Alzheimer's begins to decline corresponding to the time at which most folks began using stainless instead of aluminum cookware.