RESEARKA

_Boundary evidence only; these receipts broaden source context but do not independently prove the lead claim._

Citation Support

• source_1 Preventive Vitamin D Supplementation and Risk for COVID-19 Infection: A Systematic Review and Meta-Analysis
• source_2 Vitamin D supplementation for chronic liver diseases in adults
• source_3 Vitamin D and Type 2 Diabetes Mellitus: Molecular Mechanisms and Clinical Implications—A Narrative Review
• source_4 Role of Vitamin D Deficiency in the Pathogenesis of Cardiovascular and Cerebrovascular Diseases
• source_5 Vitamin D and Lung Outcomes in Elderly COVID-19 Patients