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ForumsCOA & Analytical TestingInter-lab variability in peptide testing — July 2024 Page 3

Inter-lab variability in peptide testing — July 2024

Dr.GastroMayo Tue, Jun 24, 2025 at 1:04 AM 41 replies 1,493 viewsPage 3 of 9
FranDenver
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Oct 2024
Denver, CO
Jun 24, 2025 at 5:19 AM#11

Thank you TrialNerd_Beth! This is incredibly helpful. Bookmarking for later. 🙏

38 5Dr.RenalNash, LipidDoc_ATL, BariatricNurseD and 35 others
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zoe_NC
Member
278
1,234
Nov 2024
Charlotte, NC
Jun 24, 2025 at 5:36 AM#12

Slightly tangential to Inter-lab variability in but Dr.GastroMayo reminded me — has the insurance landscape changed recently?

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.

Last edited: Jun 24, 2025 at 6:36 AM
18 23FranDenver, Dr.BariatricHTX, LindaRN_retired and 15 others
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GraceAZ_72
Member
156
678
Jan 2025
Tucson, AZ
Jun 24, 2025 at 5:53 AM#13

Thanks for sharing this, Dr.GastroMayo. 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.

43 3SallyK_inj, CryptoCarl, MariaRD and 40 others
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Dr.GastroMayo
VIP Member
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13,456
Jan 2024
Mayo Clinic, MN
Jun 24, 2025 at 6:10 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 zoe_NC: my doctor and I discussed the options and went with brand.

Quick update: I have noticed more improvement since posting this. Thanks again for the evidence-based discussion — this is exactly why I posted in a science-based community. 🙏

40 17MikeFit_NJ, InsuranceTom, WendyG_ATL and 37 others
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FDA_TrackerJim
Senior Member
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7,890
Feb 2024
Rockville, MD
Jun 24, 2025 at 6:27 AM#15

Adding my data to this Inter-lab variability in discussion:

MetricBaselineMonth 3Month 6
Weight272 lbs222 lbs207 lbs
A1C6.6%5.8%5.2%
hsCRP6.02.00.6

Protocol: Semaglutide 2.4mg/wk, resistance training 3x/wk, protein 1.4g/kg/day.

Last edited: Jun 24, 2025 at 9:27 AM
14 15jason_paloalto, Dr.LeslieOBGYN, MikeNYC_runner and 11 others
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