Cirrhosis & Chronic Liver Disease

References & Evidence Notes

Each numbered entry below is either a source you can follow or a note setting out what the evidence does and does not support. Both are numbered together so the markers in the text line up.

Last reviewed 27 August 2026. Supplement entries are cross-checked against the NIH National Center for Complementary and Integrative Health and the Linus Pauling Institute Micronutrient Information Center.⁸ Two cautions before anything else. Many supplements are cleared by the liver and some are directly hepatotoxic, so nothing on this page should be started without your hepatology team: green tea extract, kava, comfrey, chaparral, high-dose vitamin A and high-dose niacin have all been implicated in liver injury, and herbal products are a recognised cause of acute liver failure. And some symptoms are emergencies rather than nutrition problems: vomiting blood or passing black tarry stools can mean variceal bleeding; confusion, disorientation or a flapping tremor suggests hepatic encephalopathy; fever with abdominal pain in someone with ascites can mean spontaneous bacterial peritonitis. All three need hospital assessment the same day. The nutrition on this page matters more than on most, because malnutrition and muscle loss independently worsen survival in cirrhosis.

1. On what cirrhosis is and what changes: cirrhosis is advanced fibrosis with nodular regeneration, and it is broadly divided into compensated and decompensated disease. Decompensation, marked by ascites, variceal bleeding, encephalopathy or jaundice, sharply changes prognosis. Removing the cause, alcohol abstinence, hepatitis C cure, hepatitis B suppression, weight loss in metabolic liver disease, slows or halts progression, and some fibrosis regression is documented, though established cirrhosis is largely structural. ↩
2. On protein, where the old advice was wrong. Protein restriction was once standard in hepatic encephalopathy and is now considered harmful. Current guidance recommends 1.2 to 1.5 g of protein per kg per day, with protein restriction described as contraindicated even in hepatic encephalopathy, because sarcopenia is common in cirrhosis and independently predicts mortality, PubMed 42348593. A late-evening snack reduces the overnight fasting state, which in cirrhosis resembles days of starvation in a healthy person. Vegetable and dairy protein are often better tolerated than red meat. ↩
3. On ascites and sodium: sodium restriction, commonly around 2 g per day, with diuretics is the mainstay for ascites, and fluid restriction is generally reserved for significant hyponatraemia rather than applied routinely. Over-restriction of sodium worsens appetite and intake, which is a real trade-off in a malnourished population. ↩
4. On encephalopathy: lactulose and rifaximin are the standard treatments and work by reducing ammonia production and absorption. Branched-chain amino acids have modest evidence for encephalopathy and for nutritional support. Precipitants matter as much as treatment: infection, gastrointestinal bleeding, constipation, dehydration, electrolyte disturbance and sedatives all trigger episodes and are correctable. ↩
5. On supplements and drugs that damage the liver. Herbal and dietary supplements are increasingly implicated in drug-induced liver injury worldwide, with green tea extract, turmeric and ashwagandha among those named in the United States, PubMed 42475234. Green tea extract at high doses, kava, comfrey, chaparral, germander and anabolic-androgenic steroids are recognised causes. A United States Pharmacopeia review found that taking green tea extract as a large dose on an empty stomach sharply raises catechin absorption, which is the pattern associated with injury, PubMed 32140423, and cases confirmed by the US Drug-Induced Liver Injury Network have been moderate to severe, PubMed 34400337. High-dose vitamin A is hepatotoxic and accumulates, because it is fat-soluble; in a systematic review of hypervitaminosis A cases, most of them from non-prescription supplements, hepatobiliary problems appeared in roughly a fifth, and liver transplantation is among the treatments described, PubMed 42176931. Niacin at lipid-lowering doses has caused hepatitis, PubMed 11988158, and sustained-release forms have been the ones most often implicated. Acetaminophen is safe at reduced doses, commonly limited to 2 g per day in cirrhosis, and is preferred over NSAIDs, which precipitate kidney injury, fluid retention and gastrointestinal bleeding, and which a review of analgesics in chronic liver disease advises avoiding outright, PubMed 40904659. Iron supplements should not be taken without documented deficiency. ↩
6. On surveillance, which is the part most often skipped: six-monthly ultrasound for hepatocellular carcinoma, endoscopy to screen for and band varices, and vaccination against hepatitis A and B, influenza and pneumococcus. Early detection of hepatocellular carcinoma is the difference between curative and palliative treatment, and this is where attendance changes outcomes most. ↩
7. On alcohol: complete abstinence is the single highest-value intervention in alcohol-related cirrhosis and improves survival even at a late stage. It also matters in cirrhosis of any other cause, because alcohol accelerates fibrosis alongside every other driver. ↩
8. National Center for Complementary and Integrative Health (NIH), nccih.nih.gov, and the Linus Pauling Institute Micronutrient Information Center, lpi.oregonstate.edu/mic.