Geoff Farrell is an international authority on fatty liver associated with overweight and diabetes, and how its serious form, NASH, develops and leads to cirrhosis and liver cancer. His discovery that cholesterol damages liver cells to provoke inflammation is fundamental to devising effective NASH treatments. Farrell led Asian-Pacific guidelines on prevention and management of NASH, a world first, and on prevention of liver cancer. He has been lead investigator of NIH and NHMRC program and project grants, supervised 26 PhD candidates (6 now run their own labs), and published 4 books, more than 220 scientific articles and 140 reviews, editorials and chapters.