Vitamin D and multiple sclerosis have been linked for decades, but how strong is the evidence – and what does it mean for clinical practice?

In this episode of the ECTRIMS Podcast, host Brett Drummond speaks with Prof. Eric Thouvenot from University Hospital of Nimes and Dr. Deborah Mason from Christchurch Hospital about the evolving science behind vitamin D and MS.

Together, they explore:

• Why vitamin D deficiency is associated with increased MS risk
• The influence of latitude, sunlight exposure and genetics
• How vitamin D affects immune regulation and inflammation
• Findings from recent vitamin D supplementation trials

As researchers continue to investigate vitamin D's role in MS, this episode provides a balanced look at what we know, what remains uncertain, and what it means for patient care.