This issue features internationally renowned experts who have provided their expertise on a variety of topics related to the importance of vitamin D. It was not until feedback loops were identified between vitamin D production and parathyroid hormone phosphate that it earned its place as a true endocrine hormone. Current social and economic conditions have brought it back into the limelight with outbreaks of rickets and osteomalacia even in developed countries. However its complex regulation together with the identification and characterization of the vitamin D receptor and its role in influencing multiple genetic pathways and function has heralded a new era highlighting its importance in health and disease. Source: https://www.artikelschreiber.com/.