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Ask the Doctor: Sjogren’s and the Benefits of Vitamin D

Posted on Tue, Jul 28, 2015

Q. I keep reading about the use of vitamin D with autoimmune diseases. How important is it for Sjögren’s patients? 

A. Vitamin D is important in bone and cartilage homeostasis. New evidence indicates that vitamin D may have extraskeletal benefits on several systems including the immune system. Autoimmune diseases such as systemic lupus (SLE), and Sjögren’s have been associated in a few studies with low vitamin D levels. However, the significance of low vitamin D levels in disease pathogenesis and prevention is unclear.

What are the sources of vitamin D? Vitamin D has two precursors, Vitamin D2 (ergocalciferol) and Vitamin D3 (cholecalciferol). Vitamin D3 is synthesized mainly in the skin by the action of ultraviolet light. Vitamins D2 and D3 are found in very few dietary sources, such as fish oils or fortified dairy products, as well as supplements.

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Recommendations regarding desirable levels are based upon evidence related to bone health. Some controversy exists, but experts such as the International Osteoporosis Foundation suggest that a minimum level of 30 ng/mL is necessary to decrease the risk of falls and fracture. 

Vitamin D deficiency is very prevalent in the general population and some studies indicate a higher prevalence of vitamin D deficiency in certain autoimmune diseases. However, these studies have not been conclusive. As an example, in SLE patients, recent studies have indicated the prevalence of vitamin D deficiency to range between 38% and 96%. The wide variation can be attributed to many factors, such as the age of the patients recruited, geographic location, season at the time of the study, ethnicity, medications used and the accuracy of the vitamin D assay method used.

In Sjögren’s, few small trials have been performed to assess the prevalence of low vitamin D levels and the association with disease severity. No conclusive data has been assembled to indicate that subjects with Sjögren’s have lower vitamin D levels than healthy subjects, or to suggest a pathogenic relationship between lack of vitamin D and development of disease.

Patients with Sjögren’s can be prone to vitamin D deficiency. Photosensitivity, where exposure to ultraviolet light triggers a rash is prevented by avoiding exposure to sunlight, could contribute to lower levels of vitamin D. Furthermore, certain medications may aggravate vitamin D deficiency. Chronic corticosteroid and hydroxychloroquine use are suspected to affect vitamin D concentration and activity respectively. 

In summary, although there are no guidelines regarding optimal vitamin D levels for extraskeletal and immune system health, it would be reasonable to recommend that patients be screened for vitamin D deficiency and treated with supplementation. The American College of Rheumatology recommends a daily intake of 800–1000 IU per day of vitamin D in patients on treatment with steroids.

by Stamatina Danielides, MD

 This information was first printed in the The Moisture Seeker, SSF's patient newsletter for members. 

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Topics: sun and sjogren's, Diet, Nutrition, Sjogren's, Sun Sensitivity, Vitamin D, Lupus

The Sun & Sjögren’s: How to protect yourself

Posted on Tue, Jun 30, 2015

Sjögren’s patients, and those suffering from autoimmune disease in general, need to be cautious about their time in the sun. Ultraviolet (UV) radiation emitted from the sun and other light sources (such as some fluorescent lights) can alter immune function and lead to an autoimmune response in the body and skin.

In response to the sun, Sjögren’s patients can experience skin rashesocular sensitivity, pain, and disease flares. Sun sensitivity with Sjögren’s is associated with the autoantibody SSA/or Ro. Below are a few tips to help protect yourself this summer and year-round. 

  • Protect your skin and eyes through use of sunscreen, UV-protective lenses/sunglasses, ultraviolet light-protective clothing, hats, and non-fluorescent lighting. Sun-protective clothing is designed to protect your skin from UVA & UVB rays and is more reliable than sunscreen.
  • SSF_Sun_and_Sjogrens_TipsConsider purchasing UV-protective car and home window tinting and films (which come in clear.)
  • Wear sunscreen on areas not covered by sun-protective clothing, such as the neck and ears.
  • Read sunscreen labels and look for the words “broad spectrum,” which protects from both UVA & UVB light. Note that the SPF ratings refer only to UVB rays. 
  • Use plenty of sunscreen with a higher number SPF. Most people only use about 1/3 the recommended amount of sunscreen. This reduces the benefit of the SPF rating.
  • Remember to reapply sunscreen because water, humidity and sweating decrease sunscreen effectiveness.
  • Investigate whether UV-protective clothing and eyewear, window shields, and sunscreens are eligible for reimbursement under your insurance plan or Flexible Health Care Spending Account. 

The SSF would like to thank Mona Z. Mofid, MD, FAAD, for authoring this information that was first published in The Moisture Seekers, SSF's member newsletter, and as an SSF Patient Education Sheet.

Click Here to Receive our Newsletter  by Becoming an SSF Member

Topics: sun and sjogren's, Symptoms, Sjogren's, Dry Skin, Top 5 Tips, Makeup Tips, Chronic Pain, Flare,, Ocular Pain, Skin Rashes

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