
Interpreting Liver Function Tests in MASLD: Why “Normal” May No Longer Mean Healthy
Traditional upper limits for ALT (often ≤55 U/L in UK labs) were derived decades ago, before the epidemic of obesity and steatosis. Current evidence suggests these ranges are too high — and that values above 30 U/L may already indicate liver injury in people with metabolic risk. The British Society of Gastroenterology (BSG) guidelines emphasise that a result within the “normal range” may not be reassuring if the patient is metabolically high-risk










