Debunking the Myth of Aluminum and Alzheimer's

For decades, aluminum has made headlines as a possible cause of dementia. Studies dating back to the mid-20th century have shown that feeding rats large amounts of aluminum can lead to a type of neurofibrillary tangle. These reports have received generous coverage in the press and given rise to concern about the safety of the metal, which is, of course, present in our kitchens, not to mention in automobiles, airplanes, and elsewhere. Although the reports have generated widespread concern, the aluminum hypothesis has been seriously challenged -- one might even say totally discredited -- and consequently has been marginalized in recent years.

When inspected under electron microscope, the neurofibrillary tangles associated with aluminum appear to be different from those associated with Alzheimer's disease. Scientists have not been able to replicate the findings of increased aluminum in the brains of so-called AD victims. Despite the concern that the initial findings have caused, the whole aluminum theory seems to have been a red herring. As for the population studies that suggested greater risk with increased aluminum exposure, many other explanations could account for the statistical connections.

Aluminum is a very common metal in human ecosystems. It is present in pots and pans, antacids, and even deodorants. Avoiding exposure would be practically impossible.

The weight of evidence suggests that we need to take no actions with regard to avoiding exposure to aluminum despite the early observations that have created considerable consternation and worry that persists today.