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Evidence-based GLP-1 & peptide discussion since 2023
ForumsCOA & Analytical TestingInter-lab variability in peptide testing — July 2024 Page 3

Inter-lab variability in peptide testing — July 2024

JennaRN Tue, Jan 9, 2024 at 2:00 AM 32 replies 2,715 viewsPage 3 of 7
hannah_MT
New Member
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Feb 2026
Bozeman, MT
Jan 9, 2024 at 6:15 AM#11

SkepticalSean — wow. I've been looking for this exact info for weeks.

7 10nick_newbie, DadBodDave, AmyNC_wife and 4 others
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mark_tokyo
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Jun 2024
Tokyo, JP
Jan 9, 2024 at 6:32 AM#12

Slightly tangential to Inter-lab variability in but JennaRN reminded me — has anyone else noticed changes in their alcohol tolerance?

I know it is not exactly on-topic but it seems related enough to ask here rather than starting a new thread. Apologies if this has been covered — I did search first.

2 23bri_stats, pete_manc_UK
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WendyG_ATL
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Apr 2024
Georgia
Jan 9, 2024 at 6:49 AM#13

Thanks for sharing this, JennaRN. A few questions about your Inter-lab variabilit experience:

  1. What dose did you start at?
  2. How long before you noticed side effects improving?
  3. Did your provider have any specific recommendations about Inter-lab varia?

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

18 17traveltech_sara, AttorneyGrant, DebRD_ATL and 15 others
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JennaRN
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Mar 2024
Colorado
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Jan 9, 2024 at 7:06 AM#14

OP here — wow, did not expect this much response! Thank you all for the thoughtful replies on Inter-lab variability in.

To answer mark_tokyo: I get my labs done through Quest every 3 months.

Quick update: my latest labs came back even better. Thanks again for the evidence-based discussion — this is exactly why I posted in a science-based community. 🙏

40 14RegAffairsDC, BiostatsBrad, PeptideSynthNJ and 37 others
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josh_phd_bmore
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Jul 2024
Baltimore, MD
Jan 9, 2024 at 7:23 AM#15

Relevant to Inter-lab variability in — here is my latest bloodwork comparison:

Key improvements: A1C 8.0% → 5.3%, triglycerides 235 → 105 mg/dL, hsCRP 6.0 → 1.1 mg/L. All on tirzepatide for 15 months.

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

21 20tampaLisa73, KarenAZ_mom, zoe_NC and 18 others
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