Research appearing in Osteoporosis International (Epub ahead of print, July 4, 2008), shows a possible link between systemic lupus erythematosus (SLE) and low vitamin D levels. The cross-sectional study compared serum vitamin D levels (25(OH)D) in 26 healthy controls and 36 patients with SLE. Low vitamin D levels were more prevalent in the SLE patients than in the controls.