Suspicions of a link between aluminium and Alzheimers drove me to give up canned beverages several years ago, though I wonders what implications there are for those who wear tinfoil hats.
This was news at least 20 years ago. The aluminum cookware industry has that strong a lobby?
As far as hats go, get the non-stick foil and make sure it's applied non-stick side to the hair/head. Sort of acts like
a barrier. Also doubles as a conditioner for dry hair.