Key pointsr Intestinal failure-associated liver disease (IFALD) is defined as a persistent (more than 2 weeks) elevation of liver function tests 1.5 times above the normal reference range. r 50% of children and 30% adults have evidence of mild IFALD after 4-12 weeks of parenteral nutrition (PN). r IFALD in children typically presents as cholestasis, whereas in adults steatosis is the usual underlying histopathology.r Early detection of IFALD should prompt multiprofessional review of the PN prescription, dietetic advice regarding enteral feeding, screening for infection and co-morbidity and focus efforts to achieve early discharge from hospital. r Undernutrition, which normally defines severe liver disease, is masked by PN, frequently leading to an underestimation of IFALD severity. r Persistent jaundice is a manifestation of advanced liver disease in the context of IFALD. r When decompensation of IFALD occurs, it is often very rapid and accounts for the high mortality rate of patients awaiting liver and bowel transplants.