Sorry, I'm busy at the moment canada med store Simon Ridley, head of research at Alzheimer’s Research U.K., says the study is “intriguing” but does not prove that better hygiene causes Alzheimer’s disease. "Our risk of Alzheimer’s is likely to be influenced by a complex mix of environmental and lifestyle factors, and this study did not investigate whether other factors beyond hygiene may be linked to any differing Alzheimer’s risk in different countries."