What is the Signaling Pathway of Vitamin A?
                                
                                
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                                    3 min read                                
                            
                                Over 500 genes in the human body are regulated by the active metabolite of vitamin A, all-trans-retinoic acid (ATRA). Understanding what is the signaling pathway of vitamin A reveals how this essential nutrient orchestrates fundamental biological processes such as development, vision, and immune function at the molecular level.