ASPEN Certified Nutrition Support Clinician (CNSC) Practice Exam

Protein-energy malnutrition in liver disease most often occurs when the liver is severely impaired and cannot support normal metabolism, intake, and nutrient processing. In cirrhosis, especially when decompensated, several factors converge to drive PEM: reduced oral intake due to anorexia and early satiety from ascites and edema, malabsorption and altered bile flow that affect fat and fat-soluble vitamin absorption, increased energy expenditure from systemic inflammation, and a protein-catabolic state that leads to muscle breakdown (sarcopenia). These changes collectively tip the balance toward inadequate nutrition despite intake.

Viral hepatitis can involve malnutrition, but it is typically less common or severe unless it progresses to advanced liver failure. Hepatic steatosis and NASH often occur with obesity and may not have the same degree of malnutrition risk unless the disease advances to cirrhosis with complications. Therefore, cirrhosis represents the stage with the highest risk and prevalence of protein-energy malnutrition.