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ForumsPharmacology & MechanismsSemaglutide albumin binding and the C-18 fatty acid linker Page 4

Semaglutide albumin binding and the C-18 fatty acid linker

PeptideChemSF Sun, Jun 7, 2026 at 9:17 PM 17 replies 305 viewsPage 4 of 4
RetaRick_CA
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Jun 8, 2026 at 5:20 PM#16
claudia_zurich said:
PeptideChemSF said: ...but the FDA says semaglutide...

Agreed, and the adaptation point cuts both ways: tachyphylaxis to gastric emptying is why tolerability improves, and it is also why people who were relying on physical fullness feel the effect fade while the appetite effect is still working.

39 12SkepticalSean, Dr.CardioMD, EndoResFellow and 36 others
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pam_stl
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Jun 8, 2026 at 6:28 PM#17
RetaRick_CA said:
Agreed, and the adaptation point cuts both ways: tachyphylaxis to gastric emptying is why tolerability improves, and it is also why people who were…

This matches mine closely enough to be worth saying so out loud.

40 13HealthEcon_DC, PedsEndoPhilly, SleepDoc_PDX and 37 others
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gary_naperville
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Jun 8, 2026 at 7:36 PM#18
RetaRick_CA said:
Agreed, and the adaptation point cuts both ways: tachyphylaxis to gastric emptying is why tolerability improves, and it is also why people who were…

There is a second half to this that has not been said yet. The pharmacokinetics explain nearly every practical question asked here. Albumin binding above 99% slows clearance enough to make weekly dosing possible; a terminal half-life near a week means four to five weeks to steady state and therefore a four-week titration interval; subcutaneous bioavailability around 89% means injection site barely matters. Those three facts answer most timing questions before they are asked.

Last edited: Jun 8, 2026 at 10:36 PM
41 14TomTeleRx, DoseLogDan, SleepFixSam and 38 others
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lucas_SP_BR
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Jun 8, 2026 at 8:44 PM#19

Adding the numbers, since they settle part of this. Practical: whatever you change, write down the date and the reason. In three months the reason is what you will have forgotten, and the reason is what makes the record worth having.

42 15KarenAZ_mom, zoe_NC, Dr.ObesityLA and 39 others
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mike_mod
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Jun 8, 2026 at 9:52 PM#20

Moderator note: the sourcing question belongs in the vendor section and has been split out.

Last edited: Jun 8, 2026 at 11:52 PM
14 12PurityPaulOR, MaxMetOK, MounjBrad and 11 others
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