Can Vitamin D Benefit Patients With MS?
Hupperts et al studied patients with relapsing-remitting MS who were receiving interferon beta-1a. They randomized 229 participants to vitamin D or placebo and followed them for 48 weeks. In preliminary analyses, the investigators found no difference between treatment groups with respect to the outcome of no evidence of disease activity. Patients who received vitamin D had a lower annualized relapse rate than controls, but the difference was not statistically significant. The active group did have significantly fewer gadolinium-enhancing lesions and new T2 hyperintense lesions, compared with controls, however.
In addition, Dr. Mowry and colleagues are comparing the effects of 5,000-IU and 600-IU doses of vitamin D in patients with MS who are receiving glatiramer acetate. The ongoing study is sponsored by the National MS Society. European studies of the clinical benefit of vitamin D also are under way.
Although the benefits of vitamin D are not completely understood, many neurologists recommend supplementation to their patients with MS. Pharmacokinetic studies have not shown a difference between daily, weekly, or monthly dosing regimens. “As long as you give the same dose of vitamin D, you will get the levels … to the same general area,” said Dr. Mowry. Nevertheless, some studies in other patient populations suggest that very high doses of vitamin D given monthly are probably toxic.
Many studies have suggested that vitamin D3 may be more potent than vitamin D2. “I tend to use [vitamin] D3 when I am supplementing,” said Dr. Mowry. “I aim for levels between 40 and 60 ng/mL, based on our observational data.... For my patients, that largely means they need somewhere between 2,000 and 4,000 IU/day, although sometimes more. I usually recheck the level in three months, based on what we know about the kinetics of vitamin D supplementation. I am cautious in individuals who may be at risk for hypercalcemia or hypercalciuria.”
—Erik Greb
Suggested Reading
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Mowry EM, Pelletier D, Gao Z, et al. Vitamin D in clinically isolated syndrome: evidence for possible neuroprotection. Eur J Neurol. 2016;23(2):327-332.
Mowry EM, Waubant E, McCulloch CE, et al. Vitamin D status predicts new brain magnetic resonance imaging activity in multiple sclerosis. Ann Neurol. 2012;72(2):234-240.
Munger KL, Åivo J, Hongell K, et al. Vitamin D status during pregnancy and risk of multiple sclerosis in offspring of women in the Finnish Maternity Cohort. JAMA Neurol. 2016;73(5):515-519.
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Nielsen NM, Munger KL, Koch-Henriksen N, et al. Neonatal vitamin D status and risk of multiple sclerosis: a population-based case-control study. Neurology. 2017;88(1):44-51.
Tremlett H, van der Mei IA, Pittas F, et al. Monthly ambient sunlight, infections and relapse rates in multiple sclerosis. Neuroepidemiology. 2008;31(4):271-279.
