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Serum vitamin D is associated with improved lung function markers but not with prevalence of asthma, emphysema, and chronic bronchitis | Scientific Reports
The 7 Causes of Shortness of Breath – Dr.Berg on Breathing Problems
Vitamin D deficiency symptoms: Breathing problems could be a sign | Express.co.uk
Vitamin D May Be Linked to COPD; Associated with Respiratory Function
Vitamin D is Vital to Maintaining Healthy Lungs and Respiratory System Function - GrassrootsHealth
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Targeting Vitamin D Deficiency to Limit Exacerbations in Respiratory Diseases: Utopia or Strategy With Potential? | Calcified Tissue International
Does vitamin D deficiency increase COVID-19 risk?
Correlation of Serum Ferritin, Vitamin D Levels, and Severity of Clinical Symptoms in Patients with COVID-19 | Journal of Health Reports and Technology | Full Text
Vitamin D Deficiency - Physiopedia
Dyspnea: Causes, diagnosis, and treatment
Recent advances in vitamin D implications in chronic respiratory diseases | Respiratory Research | Full Text
Causes and Symptoms of Serious Vitamin D Deficiency – Nu U Nutrition
The constellation of vitamin D, the acute-phase response, and inflammation | Cleveland Clinic Journal of Medicine
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Vitamin D Deficiency: Causes, Symptoms & Treatment
How bad breath could be a sign of a vitamin deficiency | Daily Mail Online
Vitamin D and its therapeutic relevance in pulmonary diseases - ScienceDirect
SIMEDHealth
Coronavirus warning: How to tell it's NOT vitamin D deficiency - signs YOU are infected | Express.co.uk
7 Common Nutrient Deficiencies
IJERPH | Free Full-Text | Effect of Vitamin D in Long COVID Patients
