Pemafibrate treatment significantly ameliorated ALT levels (from 29 to 22 U/L, p < 0.001 by Wilcoxon’s signed-rank test) in the total cohort and subjects with high ALT levels (2×ULN < ALT), and improved liver fibrosis as assessed by the Fibrosis-4 index (mean change − 0.05 (95% confidence interval: −0.22 to − 0.02), p < 0.05 versus baseline by the Mann-Whitney U-test and p < 0.05 versus the ALT ≤ UNL group by the Kruskal–Wallis test followed by Dunn’s post-hoc analysis). The gene discussed is GPT; the disease is Hepatic fibrosis.