The eating of arsenic, formerly practiced for supposed health benefits.
1873, Chandler and Chandler, The American Chemist, page 204M. Ritter adds that in his experiments with men, he never met with the coloring and embonpoint which are said to result from arsenicophagy.
2010, James C. Whorton, The Arsenic Century: How Victorian Britain was Poisoned at Home, Work, and Play, OUPShe took up arsenicophagy, and in just a few months, 'had become stout, rosy-cheeked, and altogether quite to her lover's satisfaction'.