Sjogren's Syndrome Support Group
Sjogren's syndrome is an autoimmune disorder in which immune cells attack and destroy the exocrine glands that produce tears and saliva. It also associated with rheumatic disorders such as rheumatoid arthritis, and it is rheumatoid factor positive in 90 percent of cases.
Vitamin D is a fat soluble vitamin so a blood level is a good idea before adding it to your vitamin/supplement regimen in large amounts. Plus, if you blood level is very low, an over the counter amount won't be enough.