I give my kids vitamin D to try and reduce their chances of getting MS. Read THREE different studies below for more details
Vitamin D: Vital Role in Your Health:Researchers conclude the "sunshine vitamin" is good medicine. By Richard Trubo WebMD Feature Reviewed By Louise Chang, MD "mounting evidence that links LOW levels of the VITAMINS to an INCREASED risk of type 1 diabetes, muscle and bone pain, and, perhaps more serious, cancers of the breast, colon, prostate, ovaries, esophagus, and lymphatic system."
"If you're trying to reduce your risk of diabetes, or lower your chances of heart attacks, rheumatoid arthritis, or multiple sclerosis, then vitamin D should be at the front of the line in your daily supplement regimen"
http://www.mercola.com/2004/jan/31/vitamin_d_benefits.htm By Dr. Joseph Mercola
"women were 30 percent less likely to develop RA, and 40% less likely to develop MS, when taking the recommended daily amount or more of vitamin D." - Seperate study with similar % was in RN magazine.
RN Magazine about year ago- study found white military men also reduced their chances of getting MS by 40% if they took vitamin D.