MPO and nutritional deficiency disease: Endotoxin core antibody (EndoCab), lipopolysaccharide (LPS) and myeloperoxidase (MPO) may be predictive of malnutrition status in children.14 α-1-antitrypsin (AAT), MPO and neopterin, are elevated in malnourished children when compared to healthy children.15 However, other studies do not report associations with malnutrition or lactulose-rhamnose tests.16 These inconsistent associations hinder their broader application.