vitamin D

Throughout 2025, the team at Multiple Sclerosis News Today brought our readers the latest advances and updates in research related to multiple sclerosis (MS). Below are the top 10 most-read news stories we published this year. We look forward to continuing to serve the MS community in 2026 and…

Increasing blood vitamin D levels with high-dose supplementation can significantly reduce the risk of new disease activity in people with clinically isolated syndrome (CIS), or those who experienced a first episode of symptoms suggestive of multiple sclerosis (MS). That’s according to new data from the D-Lay-MS…

High doses of vitamin D provide clinically modest but statistically significant benefits for adults with multiple sclerosis (MS), according to a meta-analysis of published clinical trials. The study found patients who took the supplement saw reductions in disability scores, relapses, and new lesion formation. Those who took vitamin D for…

A high dose cholecalciferol, a form of vitamin D, significantly reduced the risk of further disease activity in people with clinically isolated syndrome (CIS), published findings from a Phase 3 trial show. Vitamin D was similarly effective for reducing disease activity among a subgroup of participants who would…

Children with multiple sclerosis (MS) who were exposed to sunlight for at least half an hour per day during the first summer of life tend to have less disease relapses than those who received less sun exposure during that period, a study found. The risk of relapse was also…

Taking high-dose cholecalciferol (vitamin D) as a supplement is safe and can nearly double the time it takes for people with clinically isolated syndrome (CIS), a first manifestation of neurological symptoms suggestive of multiple sclerosis (MS), to experience new disease activity. That’s according to data from D-Lay-MS…

Vitamin D supplements were associated with less severe disease in a rat model of progressive multiple sclerosis (MS), but male rats tended to experience greater benefits than did females, a study into disease-related sex differences reports. This higher overall benefit may be due to nerve cells in males being…

Taking a high-dose vitamin D supplement as an add-on to standard treatment for multiple sclerosis (MS) doesn’t slow the development of new lesions, a sign that the brain or spinal cord have been damaged, according to a meta-analysis study. Vitamin D also had no…

The molecular process that brings vitamin B12 into the brain can also transport Gilenya (fingolimod), an approved treatment for multiple sclerosis (MS), according to a new study. The finding “supports creating brain-targeted B12 formulations” for MS, said Jerold Chun, MD, PhD, co-author of the study at Sanford Burnham…

Welcome to “MS News Notes,” a column where I comment on multiple sclerosis (MS) news stories that caught my eye last week. Here’s a look at what’s been happening: Dalfampridine side effects The side effects that might occur if you use dalfampridine (sold under the brand name Ampyra)…

Low blood levels of vitamin D are tied to poorer cognitive skills and more severe disability in people with multiple sclerosis, researchers in Italy report. “Our study showed that [vitamin D] levels are associated with cognitive function in MS, as already well demonstrated in the general population and in…

Vitamin D reduced the signs of inflammation and nerve damage in a rat model of progressive multiple sclerosis (MS), a study shows. Low levels of the vitamin have been extensively linked with a higher risk of developing relapsing forms of the disease, but studies of vitamin D supplementation in…

Welcome to “MS News Notes,” a Monday morning column where I comment on multiple sclerosis (MS) news stories that caught my eye last week. Here’s a look at what’s been happening: Yoga vs. physical therapy The MS News Today article “Yoga better than physical therapy at improving…

A high-dose vitamin D supplement did not reduce the risk of relapses in people with relapsing-remitting multiple sclerosis (RRMS) already using a disease-modifying therapy to control disease activity, according to findings of a Phase 3 clinical trial. The VIDAMS study (NCT01490502) — standing for Vitamin D…

The body has two distinct lineages of immune cells that can be distinguished by the presence or absence of the vitamin D receptor, a preclinical study reports. The findings shed more light on how vitamin D fine-tunes immune responses and may help researchers better understand the link between vitamin…

Welcome to “MS News Notes,” a Monday morning column in which I comment on multiple sclerosis (MS) news stories that caught my eye last week. In this column, I’ll be highlighting more MS News Today articles from the Americas Committee for Treatment and Research in Multiple Sclerosis…

Taking high-dose vitamin D supplements as an add-on to standard MS treatment doesn’t reduce the risk of inflammatory disease activity for people with relapsing-remitting multiple sclerosis (RRMS), according to data from a clinical trial. The findings “suggest that prescribing higher doses of vitamin D for purposes of…

Using Mayzent (siponimod) and vitamin D3 as a combination therapy was found to improve motor function and promote remyelination — restoring the damaged myelin sheath around nerve fibers —  in a mouse model of multiple sclerosis (MS). “Our results demonstrate for the first time the potential synergistic effects…

No Link Between MS Severity, Vitamin D-related Mutations: Study Several studies over the years have indicated that there could be a link between a person’s vitamin D level and the risk of multiple sclerosis (MS). This study is slightly different. Researchers looked at whether genetic variations related to vitamin…

A number of genetic variations related to vitamin D metabolism were not significantly associated with the severity of multiple sclerosis (MS), according to a recent study. The study, “Role of Multiple Vitamin D-Related Polymorphisms in Multiple Sclerosis Severity: Preliminary Findings,” was published in Genes. In MS, the body’s immune…

People with high levels of free vitamin D in circulation before the age of 20 have a lower risk of developing multiple sclerosis (MS) later in life, a new study suggests. A significantly lower risk was also observed among people who, at ages 30–39, had elevated levels of a…

In this installment of our “Expert Voices” series, Multiple Sclerosis News Today asked Kassandra Munger to answer some of your questions about the connection between vitamin D levels and multiple sclerosis (MS). Munger received her bachelor’s in biology from the University of Rochester in 1997, master’s in…

I’ve been popping vitamin D pills for years — decades, really. I never really understood why, I just knew that many people with multiple sclerosis (MS) are vitamin D-deficient. A recent study has cast some new light on why I should continue. It all seems to comes down to…

COVID-19 Booster May Benefit Patients on Anti-CD20 Therapy After multiple reports of how Gilenya and anti-CD20 MS medications reduce the efficacy of the mRNA COVID-19 vaccines, here’s more evidence that a booster shot may improve that protection. The researchers report “modestly increased levels” of anti–SARS-CoV-2 antibodies after a third…

Vitamin D can influence the immune system’s tolerance to certain proteins by changing how DNA is packaged in specific immune cells called dendritic cells, according to a new study. Its findings could have implications for treating diseases like multiple sclerosis (MS) that are characterized by the immune system attacking…

Vitamin D supplementation may improve quality of life in people with multiple sclerosis (MS), according to a literature review study. Because vitamin D deficiency is common in MS patients, these findings suggest that “supplementation should be applied at least in a dose that covers the recommended intake,” the researchers…

I’m back in Florida for the next several months, having left cloudy, windy, chilly Maryland for the Gulf Coast. It’s been sunny and in the low 80s for the past few days, and my multiple sclerosis (MS) is feeling just fine. A lot of people with MS avoid the heat,…

Children and young adults who spend more time outdoors in the sunshine are less likely to develop multiple sclerosis (MS), according to a new study, which suggests that sunshine might help to protect against the disease. “Advising regular time in the sun of at least 30 minutes daily especially…

Vitamin D Deficiency Linked to Early Cognitive Issues in Study I’ve taken a vitamin D supplement for many years because numerous studies have shown a correlation between low vitamin D levels and MS. My levels have been normal for years, and I assume the supplement has helped. Even so,…

Low vitamin D levels in the bloodstream are associated with slower information processing speeds in people with early-stage multiple sclerosis (MS), a study suggests. “Our data support the hypothesis that vitamin D is involved in cognition in MS,” its researchers concluded. The study, “Serum Vitamin D as…