This study of 469 adults found that those with Alzheimer's Disease (n=178) had lower levels of thyroid stimulating hormone than those without Alzheimer's (n=291). The researchers found this risk to be independent of other known cerebrovascular risk factors.

Low thyroid-stimulating hormone as an independent risk factor for Alzheimer disease

Liesbeth A.D.M. van Osch, MSc, Eva Hogervorst, PhD, Marc Combrinck, FCP(SA) (Neurol) and A. David Smith, DPhil

NEUROLOGY 2004;62:1967-1971

http://www.neurology.org/cgi/conten...ract/62/11/1967