Use of barium sulfate as an unabsorbable fecal marker.
D001466:Barium Sulfate; D002118:Calcium / Q000378:metabolism* / Q000652:urine; D002136:Calcium, Dietary; D003672:Defecation; D005243:Feces / Q000032:analysis; D006801:Humans; D007408:Intestinal Absorption; D008722:Methods; D012995:Solubility
D002136:Calcium, Dietary; D001466:Barium Sulfate; D002118:Calcium