Collecting this in one place because it comes up every few weeks and the answer is always assembled from scratch. It is about liver and MASH, and it is deliberately narrow — everything I am not confident about is marked as such.
What is actually established
The liver data is among the strongest non-weight findings in the class. The semaglutide MASH programme reported a large advantage over placebo on MASH resolution, with a substantial minority also achieving fibrosis improvement — and fibrosis is the endpoint that predicts outcomes. Mechanistically it is reduced hepatic lipogenesis, increased fatty-acid oxidation, less hepatic inflammation, and possibly a direct effect on stellate-cell activation.
The condition it depends on
ALT falling is not the same as fibrosis improving. Enzymes are a crude proxy; FIB-4 or elastography is what tells you about the thing that matters.
The practical version
With resmetirom now available for MASH, combination approaches are being explored, so the standard of care in this area is moving faster than most threads assume.
What I am not sure about
What I actually want to know is whether normalised enzymes tell you anything about fibrosis, and what the right follow-up measurement is. Tell me what I have not thought of.
MASHdoc_SA said:The liver data is among the strongest non-weight findings in the class.
Liver ultrasound comparison for liver and MASH: my hepatologist ordered serial ultrasounds to track NAFLD regression.
Baseline: "Moderate hepatic steatosis, liver span 17.2cm, echogenic texture consistent with fat infiltration"
Month 8: "Mild steatosis, liver span 15.8cm, improved echogenicity"
Month 14: "Minimal to no steatosis, normal liver span 14.5cm, normal echotexture"
My liver literally shrank and de-fattened. The ultrasound tech said she's seen this pattern increasingly in GLP-1 patients and it's remarkable how consistently the fatty liver resolves.
MASHdoc_SA said:The liver data is among the strongest non-weight findings in the class.
Liver enzyme update related to liver and MASH: I had mildly elevated ALT/AST at baseline (likely NAFLD). After 11 months on GLP-1 therapy:
| Marker | Baseline | Current | Normal Range |
|---|---|---|---|
| ALT | 59 | 31 | 7-56 U/L |
| AST | 57 | 25 | 10-40 U/L |
| GGT | 94 | 33 | 9-48 U/L |
| ALP | 104 | 86 | 44-147 U/L |
FibroScan also improved — liver stiffness from 10.5 kPa to 6.2 kPa. The evidence for GLP-1 agonists in NAFLD/NASH is very promising.
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View ResultsJennaRN said:Liver enzyme update related to liver and MASH: I had mildly elevated ALT/AST at baseline (likely NAFLD).
NASH/MAFLD therapeutic landscape and liver and MASH: GLP-1 agonists are emerging as potential first-line NASH therapy. The Phase 2b data for semaglutide showed 59% NASH resolution (vs 17% placebo) with 43% achieving fibrosis improvement[1].
Mechanism: GLP-1R activation reduces hepatic lipogenesis, increases fatty acid oxidation, reduces hepatic inflammation, and may directly reduce hepatic stellate cell activation (fibrosis pathway).
With resmetirom (thyroid hormone receptor agonist) recently approved for NASH, the field is evolving rapidly. Combination approaches (GLP-1 + resmetirom) are being explored.
[1] Newsome PN, et al. N Engl J Med. 2021;384(12):1113-1124.