Effect of vitamin D₃ supplementation on Sinonasal Outcome Test-22 (SNOT-22) and visual analogue scale scores in patients with chronic rhinosinusitis
Background & objective: Chronic rhinosinusitis (CRS) is a persistent inflammatory condition of the nasal and paranasal sinus mucosa lasting more than 12 weeks. Symptoms such as nasal obstruction, facial pain, and olfactory dysfunction can substantially impair patients’ quality of life. Vitamin D₃ has been proposed as a...