RT Journal Article SR Electronic T1 Improvement of Chronic Back Pain or Failed Back Surgery with Vitamin D Repletion: A Case Series JF The Journal of the American Board of Family Medicine JO J Am Board Fam Med FD American Board of Family Medicine SP 69 OP 74 DO 10.3122/jabfm.2009.01.080026 VO 22 IS 1 A1 Gerry Schwalfenberg YR 2009 UL http://www.jabfm.org/content/22/1/69.abstract AB This article reviews 6 selected cases of improvement/resolution of chronic back pain or failed back surgery after vitamin D repletion in a Canadian family practice setting. Pub Med was searched for articles on chronic back pain, failed back surgery, and vitamin D deficiency. Chronic low back pain and failed back surgery may improve with repletion of vitamin D from a state of deficiency/insufficiency to sufficiency. Vitamin D insufficiency is common; repletion of vitamin D to normal levels in patients who have chronic low back pain or have had failed back surgery may improve quality of life or, in some cases, result in complete resolution of symptoms.