Clinical evidence linking coffee and tea intake with Parkinson's disease

Abstract

Parkinson's disease is a common neurodegenerative disorder with multifactorial etiology. Although the exact cause remains unknown, various studies have suggested the possibility of genetic and environmental interplay. Among the various environmental factors, chronic exposure to common human habits for example, cigarette smoking and caffeine intake have exhibited an inverse association with risk of developing Parkinson's disease. Coffee and tea, the two most common beverages consumed worldwide, have also been shown to reduce the risk of developing Parkinson's disease. We provide a concise overview of the clinical studies that examine the effect of coffee and tea intake on the risk of Parkinson's disease. © 2011 Elsevier GmbH.