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Keywords:

  • blood;
  • cobalamin;
  • folate;
  • homocysteine;
  • methylmalonic acid;
  • plasma;
  • psychogeriatric patients

Abstract

Cobalamin/folate deficiency is common in elderly subjects and may lead to psychiatric symptoms, but even more often it increases the severity of other organic and non-organic mental diseases. This paper reviews the literature relevant for markers of cobalamin/folate status and their relation to neuropsychiatric symptoms in the elderly. Plasma homocysteine, a marker of cobalamin/folate status, is frequently increased in psychogeriatric patients. Among markers of cobalamin/folate status, plasma homocysteine shows the best association with neuropsychiatric dysfunction. Copyright © 2001 John Wiley & Sons, Ltd.