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ForumsOral GLP-1 AgonistsOral semaglutide bioavailability optimization — meal timing evidence Page 4

Oral semaglutide bioavailability optimization — meal timing evidence

Dr.GastroMayo Wed, Jun 3, 2026 at 5:52 AM 17 replies 337 viewsPage 4 of 4
laura_annarbor
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Jun 7, 2026 at 5:00 AM#16
traveltech_sara said:
The version of this that has an answer is narrower than the version being asked.

That holds for the injectable. The oral formulation has different absorption behaviour and the dose numbers are not interchangeable, which is worth saying out loud because people quote them as if they were.

10 8labquiet_amy, emily_PDX, Dr.SleepRoch and 7 others
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james_edin
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Jun 7, 2026 at 12:59 PM#17
labquiet_amy said:
Practical: whatever you change, write down the date and the reason.

Coming at labquiet_amy’s question from a different direction. The dose-response is real but shallow at the top. Across STEP 1 and STEP 4 the gap between 1.7mg and 2.4mg is a couple of percentage points of body weight on average, and the average is carrying a wide spread — plenty of people at 1.7mg sit above the 2.4mg mean. If a dose is working and tolerable, "working" is the relevant variable, not "maximal".

11 9Dr.PathRoch, mona_PHX, andrew_nyc and 8 others
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stefan_berlin
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Jun 7, 2026 at 8:58 PM#18

One concrete data point for the thread. For anyone assembling their own picture: Tmax is one to three days, terminal half-life about 165 to 170 hours, steady state at four to five weeks, and subcutaneous bioavailability near 89%. Those four numbers explain most of the questions people ask about timing.

I would rather be corrected than agreed with, if it comes to it.

Last edited: Jun 7, 2026 at 11:58 PM
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Dr.BariatricHTX
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Jun 8, 2026 at 4:57 AM#19

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

What the dose-response curve actually looks like above 1.7mg, because the trial means hide how few people account for the extra loss?

13 11stefan_berlin, Dr.EM_Chicago, pete_RVA and 10 others
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mike_mod
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Jun 8, 2026 at 12:57 PM#20

Moderator note: reminder that nothing in this thread is medical advice, and that clinical claims need a source. No action needed from anybody.

35 8PurityPaulOR, MaxMetOK, MounjBrad and 32 others
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