Vitamin D supplements could reduce multiple sclerosis symptoms, study suggests

Previous research has shown that vitamin D deficiency can increase the risk of multiple sclerosis (MS) — and a new study suggests that supplementing it in high doses could help reduce symptoms.

The study included 303 adults in France who had experienced clinically isolated syndrome (CIS) — which is a single, initial period of neurological symptoms that could lead to MS — within the last 90 days.

One group of participants took high doses (100,000 IU) of cholecalciferol (vitamin D3) every two weeks for 24 months.