What is the other name for vitamin A2? Uncovering 3-Dehydroretinol
                                
                                
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                                    3 min read                                
                            
                                First identified in the 1940s, vitamin A2 has a distinct chemical structure and origin that sets it apart from its more common counterpart, vitamin A1. The other name for vitamin A2, a crucial piece of this biochemical puzzle, is 3-dehydroretinol. This lesser-known retinoid plays a unique role in the biology of certain species, particularly freshwater fish.