I read this study where the authors measured the Vitamin D levels in people suffering chronic pain to see if it may be a contributing factor. Vitamin D plays a role in pain perception and neuromuscular functioning, and so dysfunctions related to Vitamin D levels may present as abnormal pain states (in this case elevated).
The researchers measured the Vitamin D levels in 267 people and compared it with other parameters “such as the amount and duration of narcotic pain medication used, self-reported levels of pain, emotional distress, physical functioning, health perception”.
“The researchers found that patients who had inadequate vitamin-D levels …