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ForumsPharmacology & MechanismsSemaglutide albumin binding and the C-18 fatty acid linker Page 3

Semaglutide albumin binding and the C-18 fatty acid linker

PeptideChemSF Sun, Jun 7, 2026 at 9:17 PM 17 replies 305 viewsPage 3 of 4
Dr.PulmRoch
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Jun 8, 2026 at 11:40 AM#11
anna.melb_AU said:
Steady state is the thing most people miss.

This is exactly what I could not find anywhere else.

Last edited: Jun 8, 2026 at 12:40 PM
34 7rachel_ABQ, traveltech_sara, AttorneyGrant and 31 others
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claudia_zurich
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Jun 8, 2026 at 12:48 PM#12

From the other side of the consultation, briefly.

PeptideChemSF said:
...but the FDA says semaglutide...

Interesting point. I want to add some regulatory nuance: the FDA labeling reflects the specific clinical trial data submitted for approval. Real-world clinical practice often extends beyond the FDA label based on emerging evidence and clinical judgment.

Example: semaglutide was first approved for diabetes (Ozempic), then obesity (Wegovy). The molecule didn't change — our understanding of its applications expanded. Similarly, semaglutide may evolve as more data accumulates.

35 8tammy_FL, Dr.LipidDallas, alex_tucson and 32 others
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JessicaH_TX
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Jun 8, 2026 at 1:56 PM#13
Dr.DermMIA said:
The mechanism that matters here is not stomach emptying, it is central.

Pushing back on Dr.DermMIA 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.

36 9kim_atl_prep, sarah_TO, wendy_avl and 33 others
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TrialTracker_MD
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Jun 8, 2026 at 3:04 PM#14

One concrete data point for the thread. Numbers worth memorising for this class: Tmax one to three days for the weekly peptides, terminal half-life about a week for semaglutide and about five days for tirzepatide, steady state at four to five half-lives, subcutaneous bioavailability high enough that site choice is irrelevant.

37 10Dr.PulmRoch, maya_sedona, stefan_berlin and 34 others
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Admin
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Jun 8, 2026 at 4:12 PM#15

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part. Thread quality here is what the rules are for. Keep it up.

Last edited: Jun 8, 2026 at 8:12 PM
38 11PeptideSynthNJ, Dr.KarenChen, Dr.NateNeph and 35 others
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