Impact of Vitamin D Supplementation on Severity of Pediatric Atopic Dermatitis

Inclusion Criteria: * Atopic dermatitis diagnosed according to Hanifin and Rajka criteria * Age 2 - 17 years * SCORAD 10 - 103 Exclusion Criteria: * Active skin infection * History of underlying illness causing immunosuppression within the past 2 years * Immunosuppressors taken within the past month * Parathyroid disease * Sarcoidosis * Acute or chronic renal disease * Hyper or hypocalcemia * Thyroid disease * Osteomalacia or Paget's disease of bone * Malabsorption * Use of VD supplements (\> 400 IU daily) or fish oil supplements in the past month * Treatment for known VD deficiency in the last 6 months * Treatment with moderate or high potency topical corticosteroids, oral or topical antibiotics, oral antivirals, immune enhancers, or topical calcineurin inhibitors in the past 7 days * Phototherapy in the past month * Autoimmune disease or immunodeficiency * Planned trip to sunny climate during the 6-week study.