Ray has written about the dangers of heavy metal accumulation. Aluminium is in many medical products such as anti-acids, anti-perspirants, vaccines, antiseptics, etc. It is amazing in how many household products for both external and internal use contain this toxic metal and very few people are even aware of the health effects. I have even seen products containing aluminium being advertised as "good for the immune system" since they trigger an immune response in many people (hence their use as vaccine adjuvants).
http://www.keele.ac.uk/pressreleases/20 ... sease.html
http://www.keele.ac.uk/pressreleases/20 ... sease.html