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[161.38.201.185]) by mx.google.com with UTF8SMTPS id d9443c01a7336-2aece86b740si155566365ad.216.2026.03.15.07.47.17 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 15 Mar 2026 07:47:18 -0700 (PDT) Received-SPF: pass (google.com: domain of bounce+a6cce7.4d1858-tjphuhs=gmail.com@mg2.substack.com designates 161.38.201.185 as permitted sender) client-ip=161.38.201.185; Authentication-Results: mx.google.com; dkim=pass header.i=@mg2.substack.com header.s=mailo header.b=EuL72ZTr; dkim=pass header.i=@mailgun.org header.s=mg header.b=R2sdy06q; spf=pass (google.com: domain of bounce+a6cce7.4d1858-tjphuhs=gmail.com@mg2.substack.com designates 161.38.201.185 as permitted sender) smtp.mailfrom="bounce+a6cce7.4d1858-tjphuhs=gmail.com@mg2.substack.com"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=substack.com DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg2.substack.com; q=dns/txt; s=mailo; t=1773586037; x=1773593237; h=List-Unsubscribe-Post: List-Unsubscribe: List-Post: List-Id: List-Archive: List-Owner: Reply-To: In-Reply-To: References: Sender: Sender: Date: Message-Id: To: To: From: From: Subject: Subject: Content-Type: Mime-Version: X-Feedback-Id; bh=2udFNYfBtDg/8cf+PRD0EOA2+8Wt3qqvqx9ILZp5O58=; b=EuL72ZTross4S0mnCcFp0XmJoOMNJKKRbgdSZnZJLwEL7Kr96IMicSBGbnP2tEwKtrek8lbOsYid8BpZrGHJ1MPaky45+8QX6shXXlqWxPlYKUDJkJmsb0xSfBTOEVDi6QWEmzBPIEPpCarY8KKlKTkobiA7h7LJK/4wmy5osgU= DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mailgun.org; q=dns/txt; s=mg; t=1773586037; x=1773593237; h=List-Unsubscribe-Post: List-Unsubscribe: List-Post: List-Id: List-Archive: List-Owner: Reply-To: In-Reply-To: References: Sender: Sender: Date: Message-Id: To: To: From: From: Subject: Subject: Content-Type: Mime-Version: X-Feedback-Id; bh=2udFNYfBtDg/8cf+PRD0EOA2+8Wt3qqvqx9ILZp5O58=; b=R2sdy06q39Pt7XnGO0Etmi84dSEaMSCWXwgxzArFNExJcFyEhOHZWRwYiDIgb4nUVVubM1RxnqQIXPE6dksAZMl+QOxNC67ljRWPgnnL2H5TMAtl4MmVslDxyrcMdI8RFGt8n6CgPWdJUGlcoxaXWTSy0ge0AuYMguKpfYGNe9Q= X-Mailgun-Sid: WyIxODZiYSIsInRqcGh1aHNAZ21haWwuY29tIiwiNGQxODU4Il0= X-Feedback-Id: postmaster@mg2.substack.com:post:5a78b6d5cd16820001f2a9d4:mailgun Received: by b0df4a4ac9debac610720d7737fa4ce7f53c1d23ed022407e0947e0740cae3c5 with HTTP id 69b6c6758cb7f18f58babcdd; Sun, 15 Mar 2026 14:47:17 GMT X-Mailgun-Sending-Ip: 161.38.201.185 Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="270812c3b12e8cff518e105db0f256bac96bf7a0a36851bbba0387ed9251" Subject: How To Know What Batch You're Actually Getting From a Research Vendor From: Derek from Peptide Price To: tjphuhs@gmail.com X-Mailgun-Tag: post X-Mailgun-Track-Clicks: false Message-Id: <20260315144708.3.b2d350fefb7157ba@mg2.substack.com> Date: Sun, 15 Mar 2026 14:47:08 +0000 Feedback-Id: post-191028121:cat-post:pub-3365367:substack Sender: Derek from Peptide Price References: In-Reply-To: Reply-To: Derek from Peptide Price List-Owner: List-Url: List-Archive: List-Id: List-Post: List-Unsubscribe: List-Unsubscribe-Post: List-Unsubscribe=One-Click X-Mailgun-Variables: {"category": "post", "email_generated_at": "1773586037145", "is_freemail": "true", "post_audience": "everyone", "post_id": "191028121", "post_type": "newsletter", "pub_community_enabled": "true", "publication_id": "3365367", "subdomain": "derekpruski", "user_id": "273622398"} --270812c3b12e8cff518e105db0f256bac96bf7a0a36851bbba0387ed9251 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=E2=80=99s worth breaking down. When you go to a vendor=E2=80=99s site to verify what you=E2=80=99re orderi= ng, you=E2=80=99re typically looking at their COA page or COA library. The = number of COAs listed matters =E2=80=94 seeing multiple batches is a good t= hing. Vendors should always keep historical batches accessible so researche= rs can refer back to them down the line, whether that=E2=80=99s six months = or two years later. That said, some vendors organize this significantly better than others. Her= e are a few that stood out to me when it comes to making this easy to under= stand 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= =2E In some cases they show two cur= rently shipping batches =E2=80=94 that=E2= =80=99s simply because they=E2=80=99re running old and new labels simultane= ously during a transition, not a quality concern. It doesn=E2=80=99t pinpoi= nt the exact unit you=E2=80=99ll receive, but it=E2=80=99s considerably cle= arer than most vendors out there. peptira.com/?ref=3DDerek [ https://substack.com/redirect/252caf0d-5d3c-407e= -bcc3-615afacd9969?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768B= WtuZifRB-Zs ] =E2=80=94 Code DEREK Flawless + Glow Aminos The layout here is clean and well organized. They list the received date, l= ot number, and net content, and clearly separate current batches from histo= rical ones =E2=80=94 all in one place. At a glance you can see exactly what= =E2=80=99s in active rotation and what=E2=80=99s been retired. flawlesscompounds.com/shop/?coupon=3DDerek15 [ https://substack.com/redirec= t/0282c9ee-c925-4d8f-abf9-7cfbc0962231?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8= kfdamY0krRXGMy3p768BWtuZifRB-Zs ] =E2=80=94 Code DEREK15 glowaminos.com/sho= p/?coupon=3DDerek15 [ https://substack.com/redirect/c4a48e3e-d175-45cd-86ed= -cddc1f24b88a?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZi= fRB-Zs ] =E2=80=94 Code DEREK15 AMP Peptides AMP takes a slightly different approach that can trip people up at first, b= ut the logic is sound. There=E2=80=99s a prominent =E2=80=9CView Lab Tested= Results=E2=80=9D button on each product page that always links to the curr= ently shipping batch. Previous COA batches are organized in a separate tab = below. Once you understand the layout, it=E2=80=99s straightforward and eas= y to navigate. ameanopeptides.com/?ref=3DDerek15 [ https://substack.com/redirect/be068588-= 8b2c-4928-93dd-83702c0378ab?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRX= GMy3p768BWtuZifRB-Zs ] =E2=80=94 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 colo= r, mass, purity, endotoxins, and direct COA links =E2=80=94 all broken down= by current versus previous batches. Easy to read, easy to verify. southernaminos.com/?coupon=3Dderek [ https://substack.com/redirect/a24bace1= -4b80-41aa-a3be-0fc5ff8af0f8?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krR= XGMy3p768BWtuZifRB-Zs ] =E2=80=94 Code DEREK A Note on Vendors That Don=E2=80=99t Label Batches Clearly If a site doesn=E2=80=99t explicitly state which batch is currently shippin= g, 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=E2=80=99s going out. Many vendors don=E2=80=99t post a= new COA until they=E2=80=99ve fully transitioned inventory to that batch, = so a freshly uploaded COA is usually a reliable indicator of what you=E2=80= =99re receiving =E2=80=94 even if the site hasn=E2=80=99t updated the label= ing yet. That said, every vendor handles this differently, which is exactly why clea= r communication matters so much. The standard every vendor should be held t= o is simple: show which batch is currently shipping and which COA correspon= ds to it. That removes all guesswork and makes verification straightforward= for anyone doing their due diligence. This wasn=E2=80=99t meant to be an exhaustive list =E2=80=94 there are plen= ty of vendors I didn=E2=80=99t cover, and I=E2=80=99m sure some will look a= t this and start thinking about how to improve their own systems. None of t= his is proprietary. All of these pages are publicly accessible. Drop a comment below =E2=80=94 which COA page do you think is the best orga= nized out of all the vendors on PeptidePrice.store [ https://substack.com/r= edirect/ee97873b-b52d-4094-a965-21d0c3acf644?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRt= mZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs ]? And what would you like to see ven= dors improve or add going forward? Research use only. Not for human consumption. Unsubscribe https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9kZXJla3BydXN= raS5zdWJzdGFjay5jb20vYWN0aW9uL2Rpc2FibGVfZW1haWw_dG9rZW49ZXlKMWMyVnlYMmxrSW= pveU56TTJNakl6T1Rnc0luQnZjM1JmYVdRaU9qRTVNVEF5T0RFeU1Td2lhV0YwSWpveE56Y3pOV= GcyTURNM0xDSmxlSEFpT2pFNE1EVXhNakl3TXpjc0ltbHpjeUk2SW5CMVlpMHpNelkxTXpZM0lp= d2ljM1ZpSWpvaVpHbHpZV0pzWlY5bGJXRnBiQ0o5LlhWOFRucG1EYmxzY1M1ZXlWMFBWRjR1aWQ= 3VERzZDJDWWxTRmxyWVUyYkkiLCJwIjoxOTEwMjgxMjEsInMiOjMzNjUzNjcsImYiOnRydWUsIn= UiOjI3MzYyMjM5OCwiaWF0IjoxNzczNTg2MDM3LCJleHAiOjIwODkxNjIwMzcsImlzcyI6InB1Y= i0wIiwic3ViIjoibGluay1yZWRpcmVjdCJ9.mRtOOeFgfKnFeA0GFGTQaSUU242SDjOV7aDUBk5= cXMA? --270812c3b12e8cff518e105db0f256bac96bf7a0a36851bbba0387ed9251 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable How To Know What Batch Y= ou're Actually Getting From a Research Vendor3D""
This question comes up a lot, so it’s worth breaking down.
=
T= 7;     ­͏     ­͏     &= #173;͏     ­͏     ­͏   =   ­͏     ­͏     ­͏= ;     ­͏     ­͏     &#= 173;͏     ­͏     ­͏   &= #8199; ­͏     ­͏     ­͏=     ­͏     ­͏     = 73;͏     ­͏     ­͏   &#= 8199; ­͏     ­͏     ­͏ =     ­͏     ­͏     = 3;͏     ­͏     ­͏   = 199; ­͏     ­͏     ­͏ &= nbsp;   ­͏     ­͏     ­= ;͏     ­͏     ­͏   Q= 99; ­͏     ­͏     ­͏ &n= bsp;   ­͏     ­͏     ­= ͏     ­͏     ­͏   ̳= 9; ­͏     ­͏     ­͏ &nb= sp;   ­͏     ­͏     ­&= #847;     ­͏     ­͏    = ; ­͏     ­͏     ­͏ &nbs= p;   ­͏     ­͏     ­&#= 847;     ­͏     ­͏    = ­͏     ­͏     ­͏  = ;   ­͏     ­͏     ­= 47;     ­͏     ­͏     = ­͏     ­͏     ­͏  =   ­͏     ­͏     ­T= 7;     ­͏     ­͏     &= #173;͏     ­͏     ­͏   =   ­͏     ­͏     ­͏= ;     ­͏     ­͏     &#= 173;͏     ­͏     ­͏   &= #8199; ­͏     ­͏     ­͏=     ­͏     ­͏     = 73;͏     ­͏     ­͏   &#= 8199; ­͏     ­͏     ­͏ =     ­͏     ­͏     = 3;͏     ­͏     ­͏   = 199; ­͏     ­͏     ­͏ &= nbsp;   ­͏     ­͏     ­= ;͏     ­͏     ­͏   Q= 99; ­͏     ­͏     ­͏ &n= bsp;   ­͏     ­͏     ­= ͏     ­͏     ­͏   ̳= 9; ­͏     ­͏     ­͏ &nb= sp;   ­͏     ­͏     ­&= #847;     ­͏     ­͏    = ; ­͏     ­͏     ­͏ &nbs= p;   ­͏     ­͏     ­&#= 847;     ­͏     ­͏    = ­͏     ­͏     ­͏  = ;   ­͏     ­͏     ­= 47;     ­͏     ­͏     = ­͏     ­͏     ­͏  =   ­͏     ­͏     ­T= 7;     ­͏     ­͏     &= #173;͏     ­͏     ­͏   =   ­͏     ­͏     ­͏= ;     ­͏     ­͏     &#= 173;͏     ­͏     ­͏   &= #8199; ­͏     ­͏     ­͏=     ­͏     ­͏     = 73;͏     ­͏     ­͏   &#= 8199; ­͏     ­͏     ­͏ =     ­͏     ­͏     = 3;͏     ­͏     ­͏   = 199; ­͏     ­͏     ­͏ &= nbsp;   ­͏     ­͏     ­= ;͏     ­͏     ­͏   Q= 99; ­͏     ­͏     ­͏ &n= bsp;   ­͏     ­͏     ­= ͏     ­͏     ­͏   ̳= 9; ­͏     ­͏     ­͏ &nb= sp;   ­͏     ­
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How To Know What Batch You're Actua= lly Getting From a Research Vendor

Derek
 
3D""
=3D""
<= tr>
=3D""
READ IN APP<= img class=3D"icon text-icon" src=3D"https://substackcdn.com/image/fetch/$s_= !ET-_!,w_36,c_scale,f_png,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsu= bstack.com%2Ficon%2FLucideArrowUpRight%3Fv%3D4%26height%3D36%26fill%3Dnone%= 26stroke%3D%2523808080%26strokeWidth%3D2" width=3D"18" height=3D"18" style= =3D"min-width: 18px;min-height: 18px;border: none;vertical-align: middle;ma= rgin-right: 0;margin-left: 0;max-width: 18px" alt=3D"">
&nb= sp;

This que= stion comes up a lot, so it’s worth breaking down.

Wh= en you go to a vendor’s site to verify what you’re ordering, yo= u’re typically looking at their COA page or COA library. The number o= f COAs listed matters — seeing multiple batches is a good thing. Vend= ors should always keep historical batches accessible so researchers can ref= er 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 m= aking this easy to understand at a glance.

Peptira

Peptira separates currently shipping batches from historical ones d= irectly in their COA library, so you know upfront which batch is actively g= oing out. In some cases they show two currently shipping batches — th= at’s simply because they’re running old and new labels simultan= eously during a transition, not a quality concern. It doesn’t pinpoin= t the exact unit you’ll receive, but it’s considerably clearer = than most vendors out there.

=
3D"image.png"
=

peptira.= com/?ref=3DDerek — Code DEREK

Flawle= ss + Glow Aminos

The layout here is clean and well organize= d. They list the received date, lot number, and net content, and clearly se= parate 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.

3D"ima=

<= a href=3D"https://substack.com/redirect/0282c9ee-c925-4d8f-abf9-7cfbc096223= 1?j=3DeyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB-Zs" rel= =3D"" style=3D"color: #ff6719;text-decoration: none;">flawlesscompounds.com= /shop/?coupon=3DDerek15 — Code DEREK15 glowaminos.com/shop/?coupon=3DDe= rek15 — 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 separ= ate tab below. Once you understand the layout, it’s straightforward a= nd easy to navigate.

=3D"image.png"

ameanopeptides.= com/?ref=3DDerek15 — Code DEREK

Sout= hern Aminos

Very similar to Flawless and Glow in terms of s= tructure. Everything is laid out in a clean table: peptide name, COA date, = batch number, cap/crimp color, mass, purity, endotoxins, and direct COA lin= ks — all broken down by current versus previous batches. Easy to read= , easy to verify.

3D=

southernaminos.c= om/?coupon=3Dderek — Code DEREK

A No= te on Vendors That Don’t Label Batches Clearly

If a s= ite doesn’t explicitly state which batch is currently shipping, defau= lt to the most recent COA available. For example, if a vendor has a COA fro= m 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 unt= il they’ve fully transitioned inventory to that batch, so a freshly u= ploaded 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 h= eld to is simple: show which batch is currently shipping and which COA corr= esponds to it. That removes all guesswork and makes verification straightfo= rward for anyone doing their due diligence.

This wasn’= ;t meant to be an exhaustive list — there are plenty of vendors I did= n’t cover, and I’m sure some will look at this and start thinki= ng about how to improve their own systems. None of this is proprietary. All= of these pages are publicly accessible.

Drop a comme= nt below — which COA page do you think is the best organized out of a= ll the vendors on PeptidePrice.store? And what would you like to see vendors im= prove or add going forward?

Research use only. Not f= or human consumption.

U= pgrade to paid

You're currently a free subscriber to Peptide Price. For the full experience, upgrade your subscription.

Upgrade to paid

 
=
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© 2026 Derek Pruski
548 Market Str= eet PMB 72296, San Francisco, CA 94104
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