Association of Vitamin B12 and Ferritin Levels With Neuropathic Pain and Disease Severity in Fibromyalgia Syndrome
: Fibromyalgia syndrome (FMS) is a chronic disorder characterized by widespread musculoskeletal pain, often accompanied by fatigue, sleep disturbance, and cognitive impairment. Neuropathic pain is an important but underrecognized component of FMS, which significantly worsens disease burden. Micronutrient deficiencies, particularly serum vitamin B12 and ferritin, are suggested to influence pain perception and neuronal function,…