It is believed by many to help harden teeth, although some research has shown the opposite effect. Unfortunately, fluoride also strongly attracts [[aluminum]], which some studies suggest causes [[Alzheimer's disease]].<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056430</ref><ref>http://www.controlyourimpact.com/articles/antiperspirant-aluminum-and-alzheimers-disease</ref><ref>http://www.rense.com/general37/alum.htm</ref> | It is believed by many to help harden teeth, although some research has shown the opposite effect. Unfortunately, fluoride also strongly attracts [[aluminum]], which some studies suggest causes [[Alzheimer's disease]].<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056430</ref><ref>http://www.controlyourimpact.com/articles/antiperspirant-aluminum-and-alzheimers-disease</ref><ref>http://www.rense.com/general37/alum.htm</ref> |