This Study Include Chronic Obstructive Pulmonary Disease(COPD) Patients . Patients Were Vitamin D Deficient Age Range 40 to 80 Years, Smokers Patients Were Advised to Take Either Placebo or Vitamin D3 . Antioxidant Enzymes Were Assessed at Baseline and at 26th Weeks.

Phase 2 Unknown 40 enrolled Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh

RandomizedParallel-groupOpen-labelSupportive care

Vitamin D3 supplementation dose not increase plasma antioxidant enzymes level in COPD patients was the null hypothesis of the research.

Evaluation	Drug	Modality	Dose	Route
Comparator	Cholecalciferol	Other / unclassified	40000 iu	Oral