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ForumsTirzepatide (Mounjaro / Zepbound)SURMOUNT-5: Tirzepatide vs semaglutide head-to-head — November 2025 Page 3

SURMOUNT-5: Tirzepatide vs semaglutide head-to-head — November 2025

LabKate Sat, Mar 14, 2026 at 9:46 PM 36 replies 1,552 viewsPage 3 of 8
BariatricNurseD
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Mar 15, 2026 at 3:39 PM#11
chris_chi24 said:
Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak.

Agreed, though "tolerable" needs defining. A dose you tolerate by eating almost nothing is not tolerated, it is being paid for somewhere else — usually in lean mass, sometimes in adherence three months later.

Worth separating that from semaglutide, which this thread keeps folding into the same question. They behave differently and the advice does not transfer.

6 4tony_orlando, Dr.NephBHM_UK, kim_atl_prep and 3 others
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wendy_avl
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Mar 16, 2026 at 3:52 AM#12
Dr.MetabolicMD said:
Agreed on the mechanism, with the caveat that the head-to-head used semaglutide 1mg, not 2.4mg.

This answered a question I did not know how to ask. I will report back once I have actually tried it.

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SleepFixSam
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Mar 16, 2026 at 4:05 PM#13
chris_chi24 said:
Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak.

Pushing back on chris_chi24 here. The trial means are being read too generously in this thread. STEP populations were selected, supported, and titrated by protocol, and the real-world curves are consistently a few points worse. That difference is not noise, it is what happens when you remove the study infrastructure.

Correct me if the detail matters more than I have assumed.

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lisa_labSD
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Mar 17, 2026 at 4:17 AM#14

The figures, for anyone assembling their own picture. For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine. Half the figures circulating in this community trace back to a secondary summary that dropped a qualifier.

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mike_mod
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Mar 17, 2026 at 4:29 PM#15

Moderator note: a couple of off-topic posts removed. Thread quality here is what the rules are for. Keep it up.

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