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ForumsTirzepatide (Mounjaro / Zepbound)GIP receptor: the underappreciated half of tirzepatide's mechanism Page 4

GIP receptor: the underappreciated half of tirzepatide's mechanism

NeuroNate Sat, May 9, 2026 at 2:22 AM 19 replies 575 viewsPage 4 of 4
steve_okc
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Oklahoma City, OK
May 10, 2026 at 9:53 AM#16
CarlaRPh_TPA said:
Dose-response modeling for tirzepatide: Emax model fitting to the STEP/SURMOUNT dose-finding data shows: Semaglutide: ED50 ≈ 0.6mg, Emax ≈ -18%, Hill…

Second this.

Last edited: May 10, 2026 at 1:53 PM
25 0NauseaFreeNow, SteveThurs, B12Beth and 22 others
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amsterdam_pete
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May 10, 2026 at 2:18 PM#17

One thing that is still open after VendorMark’s answer:

Which effects tachyphylax and which persist, because the answer explains why tolerability improves while the appetite effect keeps working?

24 24ZaraB_AL, JakeSmashed95, NauseaFreeNow and 21 others
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DanielChem_CHI
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May 10, 2026 at 6:43 PM#18
dave_SLC said:
Practical: whatever you change, write down the date and the reason.

Pushing back on dave_SLC here. Not convinced. The evidence being cited is consistent with the conclusion and also consistent with two other conclusions nobody has ruled out.

That is the short version; the long version is somebody else's post.

23 23patPC_UT, Dr.DermMIA, fiona_VT and 20 others
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greg_boulder
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Jul 2024
Boulder, CO
May 10, 2026 at 11:09 PM#19
dave_SLC said:
Practical: whatever you change, write down the date and the reason.

True, and it depends on a baseline nobody has stated. Without knowing where someone started, the same number can be an excellent result or a disappointing one.

22 22patPC_UT, Dr.DermMIA, fiona_VT and 19 others
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mike_mod
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May 11, 2026 at 3:35 AM#20

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part.

Last edited: May 11, 2026 at 5:35 AM
50 0PurityPaulOR, MaxMetOK, MounjBrad and 47 others
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