since present-day refining and food selection patterns , as well as pure corn diets , deplete both the b vitamins and w3-efa , the existence of therapeutically cross-reacting homologous catalyst and substrate deficiency forms of pellagra are postulated , the first contributing to the b vitamin deficiency epidemics of 50-100 years ago , the second to the more recent endemic `` '' diseases of western civilization '' '' which express in certain genetic subgroups as the major mental illnesses of today .
C0030783
pellagra
C0042850
b vitamin deficiency