Wegovy activates GLP-1 receptors, which act on the brain's appetite centers to reduce hunger and cravings, and slows how quickly food leaves the stomach so you feel full for longer and eat smaller meals. These effects support significant, sustained weight loss when combined with a reduced-calorie diet and increased physical activity.
These actions target the metabolic drivers behind MASLD and MASH: excess body weight and insulin resistance. As weight decreases and insulin sensitivity improves, fat tends to build up less in liver cells, and the inflammation that drives disease progression may ease.
In a clinical trial of adults with biopsy-confirmed MASH and moderate-to-advanced fibrosis (F2–F3), weekly semaglutide 2.4 mg was compared with placebo, both alongside standard care, over 72 weeks. At an interim analysis, semaglutide-treated patients showed significantly better liver histology outcomes than those on placebo, alongside an average weight loss of about 10.5%. Wegovy is not used on its own — providers pair it with dietary changes, physical activity, and regular monitoring, such as Liver Function Tests (LFTs), to support these outcomes.