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Dietary intake of vitamin E may reduce risk of Parkinson's disease

ST. PAUL, MN Previous research has implicated oxidative damage (cell degradation) in the development of Parkinson's disease. Because vitamins E, C and carotenoids are antioxidants, researchers recently studied the associations between their intake and risk of Parkinson's disease. Their conclusions point not to supplements, but to dietary intake of vitamin E (from the foods we eat) as having a protective factor in the risk of developing Parkinson's disease. The study is reported in the October 22 issue of Neurology, the scientific journal of the American Academy of Neurology.

Using repeated and validated dietary assessments of two large study cohorts, researchers from Harvard School of Public Health, Brigham and Women's Hospital, and Harvard Medical School examined the associations between dietary intakes of vitamin E, C, and carotenoids, vitamin supplements, and risk of Parkinson's disease. After exclusions, 76,890 women from the Nurses' Health Study (NHS) and 47,331 men from the Health Professionals Follow-Up Study (HPFS) were included in the study analyses.

Dietary data was collected from the women's cohort since 1984 and from the men's since 1986. The food frequency questionnaires used in the NHS and HPFS have been validated and shown to reflect reasonably the long-term nutrient intakes of study participants. In addition to dietary assessments, questions on the use of specific vitamins and brand and type of multivitamins were asked. By 1998, the end of the study term, a total of 371 new cases of Parkinson's disease (161 in women and 210 in men) were documented.

"In these two large cohorts, we found no evidence that use of vitamin E or C supplements or multivitamins reduced the risk of Parkinson's," says study author Shumin Zhang, MD, ScD, Harvard School of Public Health and Harvard Medical School. "In contrast, however, higher intake of dietary vitamin E was associated with a significantly lower risk of Parkinson's."


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Contact: Cheryl Alementi
calementi@aan.com
651-695-2737
American Academy of Neurology
21-Oct-2002


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