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Feb. 5, 2026

Efimosfermin alfa (BOS-580) once per month in people with metabolic dysfunction-associated steatohepatitis with F2 or F3 fibrosis

results from a 24-week, randomised, double-blind, placebo-controlled, phase 2 trial

Mazen Noureddin, Kris V Kowdley, Tatjana Odrljin et al. - The Lancet

This phase 2 trial of efimosfermin alfa (FGF21 analogue) showed favorable tolerability in patients with MASH and F2/F3 fibrosis. The results support further development of metabolic therapies targeting the liver-cardiovascular axis.

Summary

In this phase 2 trial, treatment with efimosfermin once per month was generally well tolerated in participants with biopsy-confirmed MASH and F2 or F3 fibrosis. These results support the further development of efimosfermin for treatment of MASH-related fibrosis.