In October 2018 researchers from the USA published the results of their study to assess the effect of vitamin D supplementation in individuals with early Parkinson’s disease as it has been seen that vitamin D deficiency is common in individuals with this medical condition. A total of 1,741 individuals were included in the study and divided into four groups according to daily supplement use: namely no vitamin D (54%), multivitamin (34%), vitamin D of over 400 IU/day (5%), and multivitamin + vitamin D (7%). The clinical outcomes of the various supplementations were assessed at 3 years for each group. Results showed that at 3 years there was no significant difference in clinical outcomes in the four groups.
Luthra NS et al. Characterization of vitamin D supplementation and clinical outcomes in a large cohort of early Parkinson’s disease. J Clin Mov Disord. 2018 Oct 31;5:7