Vitamin D

Description

Vitamin D, primarily in the forms of D2 (ergocalciferol) and D3 (cholecalciferol), is a fat-soluble secosteroid involved in calcium regulation and numerous cellular functions. In research environments, Vitamin D is often investigated for its role in gene transcription via the vitamin D receptor (VDR) and its modulation of immune and endocrine signaling. Experimental models explore its stability, transport, and conversion into active metabolites like calcitriol.