Despite the published view that there is no connection between aluminium and dementia, a study was carried out in the south west where there was a high incident of patient who had been treated in the local hospitals on dialysis machines and developing dementia later. It was all to do with the levels of aluminium levels in the water. Also research was carried out (Gillette) to see if connection between of products such as deodrants (levels of aluminium) and dementia. The results have not been published. I suspect there is a connection.