Which Vitamin Is Responsible for Xanthurenic Aciduria?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                A rare inherited metabolic disorder, hydroxykynureninuria (a form of xanthurenic aciduria), occurs in less than 1 in 1,000,000 people worldwide and is caused by a genetic enzyme deficiency. Xanthurenic aciduria can also result from a nutritional shortage of a specific, more common, vitamin.