Background: Low level of vitamin D is associated with a more severe course and low quality of life in relapsing-remitting multiple sclerosis (RRMS). Low dose vitamin D intake has improved quality of life in RRMS patients.
Objective: This study explored the effect of high dose vitamin D intake on quality of life in RRMS patients in a double blind randomized clinical trial.
Methods: 94 RRMS patients were randomized to two groups. One group received 50,000 IU vitamin D3 every five days for 3 months. The other group received placebo. Interferon-β (IFN-β) continued as the main treatment in both groups. Quality of life was assessed using MSQOL-54 Persian version at the beginning and at the end of the study.
Results: After 3 months, the vitamin D group had a significant difference in mental health composite with placebo group, 62.41 ± 13.99 vs. 60.99 ± 17.99 (p-value = 0.041). Change in health was 75.74 ± 25.73 and 70.59 ± 26.45 in vitamin D and placebo group, respectively (p-value = 0.036).
Conclusions: Mental QOL improved significantly after taking high dose vitamin D for 3 months in vitamin D group relative to placebo.
Keywords: Mental health; Multiple sclerosis; Physical health; Quality of life; Vitamin D.