Those with neuromuscular disease have often been found to also have a vitamin D deficiency. In previous years, vitamin D deficiency has been associated with neurological disorders such as multiple sclerosis, myasthenia gravis and Parkinson’s disease. A more recent study suggests that this may be prevalent in other neuromuscular conditions as well. Research shows that vitamin D supplementation may help improve functioning in elderly patients as well as individuals with myasthenia gravis and Parkinson’s. These findings may push physicians to consider monitoring vitamin D levels in their patients and supplementing in cases of neurologic conditions.