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ForumsTirzepatide (Mounjaro / Zepbound)Tirzepatide and fatty liver — SURPASS hepatic substudies Page 3

Tirzepatide and fatty liver — SURPASS hepatic substudies

MASHdoc_SA Thu, May 14, 2026 at 8:13 AM 19 replies 656 viewsPage 3 of 4
Dr.DermMIA
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May 19, 2026 at 12:36 PM#11
Dr.NutriCornell said:
The GIP arm is doing real work rather than padding the label.

Saving this. It is the first explanation that did not require me to already understand it. Adding it to my notes with a link back to this thread.

47 22LipidDoc_ATL, BariatricNurseD, MASHdoc_SA and 44 others
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NurseAsh_DET
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May 20, 2026 at 5:26 PM#12

Clinical perspective, offered as context rather than as advice.

Dose-response modeling for tirzepatide: Emax model fitting to the STEP/SURMOUNT dose-finding data shows:

Semaglutide: ED50 ≈ 0.6mg, Emax ≈ -18%, Hill coefficient ≈ 1.3
Tirzepatide: ED50 ≈ 6mg, Emax ≈ -25%, Hill coefficient ≈ 1.5

Clinical implication: most patients achieve >80% of maximal response by the mid-range dose (1.7mg sema, 10mg tirz). Going to the maximum dose provides diminishing returns — possibly not worth the additional side effect burden for some patients. Individualize dosing based on response vs tolerability.

46 21ricardo_MIA, BrianDallas92, labquiet_amy and 43 others
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NeuroNate
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May 21, 2026 at 10:17 PM#13
sarah_TO said:
The liver data is among the strongest non-weight findings in the class.

This is where I part company with the consensus forming above. Not convinced. The evidence being cited is consistent with the conclusion and also consistent with two other conclusions nobody has ruled out.

Last edited: May 22, 2026 at 4:17 AM
45 20sarah_TO, wendy_avl, jason_paloalto and 42 others
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FDA_TrackerJim
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May 23, 2026 at 3:09 AM#14

The figures, for anyone assembling their own picture. The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the same conditions. Nobody wants that answer and it is still the answer.

44 19Dr.LeslieOBGYN, MikeNYC_runner and 41 others
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Admin
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May 24, 2026 at 8:01 AM#15

Moderator note: reminder that nothing in this thread is medical advice, and that clinical claims need a source.

Last edited: May 24, 2026 at 12:01 PM
43 18PeptideSynthNJ, Dr.KarenChen, Dr.NateNeph and 40 others
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