Nearly 4 in 10 adults had a ‘fatty liver’ on ultrasound in the BALLETS study, and an abnormal ALT concentration was the strongest laboratory predictor of this finding.11 Obesity was more strongly associated with ‘fatty liver’ than with alcohol excess, but one-quarter of adults with ‘fatty liver’ were neither overweight nor excessive alcohol drinkers. Here, GPT is linked to Hepatic steatosis.