Vitamin D Deficiency: Comprehensive Guide to Symptoms, Causes, Diagnosis (ICD-10), and Gluten-Free Considerations (2025)

Vitamin D Deficiency: Comprehensive Guide to Symptoms, Causes, Diagnosis (ICD-10), and Gluten-Free Considerations (2025)
The Critical Role of Vitamin D and Defining Deficiency Vitamin D, often referred to as the “sunshine vitamin,” is a fat-soluble secosteroid essential for numerous physiological processes, most notably calcium homeostasis and bone mineralization. Unlike most vitamins, Vitamin D functions as a prohormone, meaning the body can synthesize it when skin is exposed to ultraviolet…