The Vitamin Associated with the 4D's: Niacin and Pellagra
                                
                                
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                                    4 min read                                
                            
                                Historically prevalent in areas of poverty and malnutrition, the condition known as pellagra is defined by a characteristic set of symptoms. This debilitating disease is caused by a severe lack of a specific vitamin, leading to the infamous cluster of symptoms referred to as the 4D's.