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ForumsCOA & Analytical TestingBatch-to-batch purity variation — looking for input

Batch-to-batch purity variation — looking for input

Dr.EndoIndy Mon, May 26, 2025 at 6:39 AM 17 replies 1,487 viewsPage 1 of 4
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Dr.EndoIndy
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Indianapolis, IN
May 26, 2025 at 8:04 AM#1

My endo and I disagree about batch-to-batch purity variation looking for input and I want a reality check.

They are saying that I do not need to worry about it but everything I have read here suggests otherwise.

I trust this community's collective knowledge but I also do not want to go against medical advice without good reason. What would you do?

5 14mia_MS2, LeilaHI, marcus_mpls and 2 others
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anders_CPH
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Feb 2024
Copenhagen, DK
May 26, 2025 at 8:21 AM#2

Dr.EndoIndy's experience with Batch-to-batch purity resonates deeply with mine. I went through almost the identical process — starting dose, titration timeline, side effects, everything.

The main difference: I titrated faster. But the overall trajectory has been remarkably similar. Down 64 lbs in 9 months.

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

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JennaRN
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May 26, 2025 at 8:38 AM#3

Thanks for sharing this, Dr.EndoIndy. A few questions about your Batch-to-batch 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 Batch-to-batch?

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

Last edited: May 26, 2025 at 9:38 AM
9 8BiostatsBrad, PeptideSynthNJ, Dr.KarenChen and 6 others
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Dr.EndoIndy
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Oct 2024
Indianapolis, IN
May 26, 2025 at 8:55 AM#4

OP here — wow, did not expect this much response! Thank you all for the thoughtful replies on Batch-to-batch purity.

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

Quick update: things are still going well. Thanks again for the evidence-based discussion — this is exactly why I posted in a science-based community. 🙏

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jason_paloalto
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Palo Alto, CA
May 26, 2025 at 9:12 AM#5

Relevant to Batch-to-batch purity — here is my latest bloodwork comparison:

Key improvements: A1C 8.4% → 5.5%, triglycerides 217 → 117 mg/dL, hsCRP 8.0 → 1.1 mg/L. All on tirzepatide for 9 months.

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

Last edited: May 26, 2025 at 2:12 PM
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