Overview Effects of Vitamin D in Parkinson's Disease (PD) Status: Completed Trial end date: 2015-01-01 Target enrollment: Participant gender: Summary A trial to measure the effects of vitamin D (versus a placebo) on balance, gait, falls, strength, and cognition in persons with Parkinson's disease. Phase: Phase 2 Details Lead Sponsor: VA Office of Research and DevelopmentCollaborator: Oregon Health and Science UniversityTreatments: CalciumCalcium, DietaryCholecalciferolErgocalciferolsVitamin DVitamins