"These results are exciting, as vitamin D has the potential to be an inexpensive, safe and convenient treatment for people with multiple sclerosis," said study author Peter Calabresi from Johns Hopkins University School of Medicine in the US.
Low levels of vitamin D in the blood are tied to an increased risk of developing MS and are more likely to have greater disability and more disease activity.
The current recommended daily allowance of vitamin D is 600 international units.
Patients with severe vitamin D deficiency were not included in the study.
Blood tests at the start of the study and again at three and six months measured the amount of vitamin D in the blood and the response in the immune system's T cells, which play a key role in MS.
helps to provide educational information for persons affected by MS