07 Aug 2019 --- Patients with Parkinson’s disease were found to have significantly lower levels of vitamin D in their blood in a study published in the journal Acta Neurologica Scandinavia. The study, which evaluated 182 Parkinson’s patients and 185 healthy individuals, also found that patients with lower vitamin D levels were more prone to accidents of falling, sleep problems, depression and anxiety. The findings suggest that vitamin D supplementation may help to treat the non-motor symptoms associated with Parkinson's disease.