Abstract
Background: Carpal tunnel syndrome (CTS) is a debilitating neuropathy that accompanies pain and other physical limitations and disrupts the normal functioning of the victims' lives.
Objective: We aimed to investigate Vitamin D's preventive and therapeutic effects on the occurrence and remission of CTS symptoms.
Methods: In this systematic review the PRISMA statement has been designed primarily. An extensive search was undertaken in various databases, including PubMed, Cochrane library, Web of Science, EMBASE, and Scopus. After considering the inclusion and exclusion criteria of the study, finally, 19 articles were retrieved. The raw data were extracted and entered into an Excel form, and the study outcomes were investigated.
Results: The main symptoms and tests, including functional score, nerve conduction, and pain, were improved after Vitamin D supplementation in CTS patients. However, they revealed worse scores in people with low Vitamin D levels. In addition, the scores of mentioned indices were worsened in people with lower serum Vitamin D levels. Nevertheless, some studies did not find a significant relationship between low serum 25(OH)D and more significant pain scores in CTS patients. In addition, Vitamin D inserts its effects on CTS by regulating cell proliferation, nerve growth factor, suppression of oxidative stress and inflammatory cytokines, and improvement in cartilage and microvascular damage.
Conclusion: Vitamin D supplementation can improve the symptoms in CTS patients, and low serum 25(OH)D can aggravate the symptoms of the disease and could be a risk factor for its occurrence. However, more observational studies and clinical trials are needed.
Keywords: Vitamin D, serum 25(OH)D, carpal tunnel syndrome, systematic review, oxidative stress, cytokines.
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