Subject: How To Know What Batch You're Actually Getting From a Research Vendor
From: Derek from Peptide Price <[email-masked]>
To: [email-masked]
Date: Sun, 15 Mar 2026 14:47:08 +0000
List-Id: <derekpruski.substack.com>

View this post on the web at https://derekpruski.substack.com/p/how-to-know-what-batch-youre-actually

This question comes up a lot, so it’s worth breaking down.
When you go to a vendor’s site to verify what you’re ordering, you’re typically looking at their COA page or COA library. The number of COAs listed matters — seeing multiple batches is a good thing. Vendors should always keep historical batches accessible so researchers can refer back to them down the line, whether that’s six months or two years later.
That said, some vendors organize this significantly better than others. Here are a few that stood out to me when it comes to making this easy to understand at a glance.
Peptira
Peptira separates currently shipping batches from historical ones directly in their COA library, so you know upfront which batch is actively going out. In some cases they show two currently shipping batches — that’s simply because they’re running old and new labels simultaneously during a transition, not a quality concern. It doesn’t pinpoint the exact unit you’ll receive, but it’s considerably clearer than most vendors out there.
peptira.com/?ref=Derek [ https://substack.com/redirect/252caf0d-5d3c-407e-bcc3-615afacd9969?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ] — Code DEREK
Flawless + Glow Aminos
The layout here is clean and well organized. They list the received date, lot number, and net content, and clearly separate current batches from historical ones — all in one place. At a glance you can see exactly what’s in active rotation and what’s been retired.
flawlesscompounds.com/shop/?coupon=Derek15 [ https://substack.com/redirect/0282c9ee-c925-4d8f-abf9-7cfbc0962231?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ] — Code DEREK15 glowaminos.com/shop/?coupon=Derek15 [ https://substack.com/redirect/c4a48e3e-d175-45cd-86ed-cddc1f24b88a?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ] — Code DEREK15
AMP Peptides
AMP takes a slightly different approach that can trip people up at first, but the logic is sound. There’s a prominent “View Lab Tested Results” button on each product page that always links to the currently shipping batch. Previous COA batches are organized in a separate tab below. Once you understand the layout, it’s straightforward and easy to navigate.
ameanopeptides.com/?ref=Derek15 [ https://substack.com/redirect/be068588-8b2c-4928-93dd-83702c0378ab?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ] — Code DEREK
Southern Aminos
Very similar to Flawless and Glow in terms of structure. Everything is laid out in a clean table: peptide name, COA date, batch number, cap/crimp color, mass, purity, endotoxins, and direct COA links — all broken down by current versus previous batches. Easy to read, easy to verify.
southernaminos.com/?coupon=derek [ https://substack.com/redirect/a24bace1-4b80-41aa-a3be-0fc5ff8af0f8?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ] — Code DEREK
A Note on Vendors That Don’t Label Batches Clearly
If a site doesn’t explicitly state which batch is currently shipping, default to the most recent COA available. For example, if a vendor has a COA from August 2025 and another from January 2026, the January 2026 batch is most likely what’s going out. Many vendors don’t post a new COA until they’ve fully transitioned inventory to that batch, so a freshly uploaded COA is usually a reliable indicator of what you’re receiving — even if the site hasn’t updated the labeling yet.
That said, every vendor handles this differently, which is exactly why clear communication matters so much. The standard every vendor should be held to is simple: show which batch is currently shipping and which COA corresponds to it. That removes all guesswork and makes verification straightforward for anyone doing their due diligence.
This wasn’t meant to be an exhaustive list — there are plenty of vendors I didn’t cover, and I’m sure some will look at this and start thinking about how to improve their own systems. None of this is proprietary. All of these pages are publicly accessible.
Drop a comment below — which COA page do you think is the best organized out of all the vendors on PeptidePrice.store [ https://substack.com/redirect/ee97873b-b52d-4094-a965-21d0c3acf644?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ]? And what would you like to see vendors improve or add going forward?
Research use only. Not for human consumption.

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