I had an Organic Chemistry professor back in like 2001 who swore by the Al link, or at least was very cautious about it and made the lifestyle changes to eliminate all the aluminum cookware she said could leach with the cooking of acidic foods and all. Seemed a pretty easy enough thing to avoid when we went all cast iron and stainless steel. I'm curious what the history to this Al hypothesis is.
For at least 10 years it's been known that alzheimer's victims show deposits of aluminum in their brains. There was no conclusive cause-effect shown though. But I've been avoiding aluminum for ten years now - to be on the safe side. It's also easy enough to avoid aluminum.