Pellagra, also known as niacin-tryptophan deficiency, is related to abdominal obesity-metabolic syndrome 1 and aging, and has symptoms including gastrointestinal disturbance An important gene associated with Pellagra is SLC6A19 (Solute Carrier Family 6 Member 19), and among its related pathways/superpathways are Metabolism and Metabolism of water-soluble vitamins and cofactors. The drugs Hydroxocobalamin and Niacin have been mentioned in the context of this disorder. Affiliated tissues include skin and bone marrow, and related phenotypes are homeostasis/metabolism and renal/urinary system