Vitamin D is well-known for its role in the regulation of calcium balance and bone health. Within recent decades, an enormous amount of research has focused on additional benefits. Observational studies report that low vitamin D levels may increase the risk of infections including:
- Tuberculosis (TB)
- Human immunodeficiency virus (HIV)
- Hepatitis C
- Respiratory tract infections
The vast majority of human cells have vitamin D receptors. It is particularly essential for an optimal immune system function. Vitamin D stimulates cells that fight against bacterial, fungal, and viral infections while creating an inhospitable environment for microbial growth.