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Evidence-based GLP-1 & peptide discussion since 2023
Forumsβ€ΊCOA & Analytical Testingβ€ΊIs 98% purity actually good or should I be worried

Is 98% purity actually good or should I be worried

mona_PHX Sun, Feb 8, 2026 at 8:30 AM 11 replies 559 viewsPage 1 of 3
mona_PHX
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Feb 8, 2026 at 9:55 AM#1

Is 98% purity actually good or should I be worried

Wanted to share some data with the community since I know we're all about evidence here.

Background: I have been tracking everything meticulously since starting my GLP-1 12 months ago. Here's what I have found regarding is 98% purity actually good or.

I'll post my numbers below and would love to see others share theirs too. The more data points we have, the better we can all make informed decisions.

Fair warning β€” this is a long post. TL;DR at the bottom for those who do not want the full breakdown.

47 10RetaRick_CA, JenPlateau, SallyK_inj and 44 others
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Dr.ObesityLA
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Feb 8, 2026 at 10:12 AM#2

mona_PHX's experience with Is 98% purity actually resonates deeply with mine. I went through almost the identical process β€” starting dose, titration timeline, side effects, everything.

The main difference: I titrated faster. But the overall trajectory has been remarkably similar. Down 68 lbs in 13 months.

One thing I would add that mona_PHX did not mention: the relationship with food fundamentally changed.

Last edited: Feb 8, 2026 at 11:12 AM
26 19KarenAZ_mom, zoe_NC, Dr.ObesityLA and 23 others
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SteveThurs
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Feb 8, 2026 at 10:29 AM#3

Thanks for sharing this, mona_PHX. A few questions about your Is 98% purity experience:

  1. What dose are you currently on?
  2. How long before you noticed significant changes?
  3. Did your doctor have any specific recommendations about Is 98% purity?

I am in a similar boat and trying to learn from others' experiences before my next appointment.

Last edited: Feb 8, 2026 at 2:29 PM
46 13SleepFixSam, PurityPaulOR, MaxMetOK and 43 others
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mona_PHX
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Dec 2024
Phoenix, AZ
Feb 8, 2026 at 10:46 AM#4

OP here β€” wow, did not expect this much response! Thank you all for the thoughtful replies on Is 98% purity actually.

To answer SteveThurs: yes, I am on compounded sema from a 503B pharmacy.

Quick update: things are still going well. Thanks again for the evidence-based discussion β€” this is exactly why I posted in a science-based community. πŸ™

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quinn_sf
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Feb 8, 2026 at 11:03 AM#5

Relevant to Is 98% purity actually good or β€” here is my latest bloodwork comparison:

Key improvements: A1C 7.6% β†’ 5.5%, triglycerides 201 β†’ 101 mg/dL, hsCRP 8.0 β†’ 1.3 mg/L. All on tirzepatide for 17 months.

The inflammatory marker drop is what impresses me most. Consistent with the SELECT trial's cardiovascular findings.

16 19Dr.EndoEP, GraceAZ_72, carl_compliance and 13 others
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