Email Archive

What’s new on peptideprice: payment filters and sterility testing tiers

Score 0.917 · Account tjphuhs@gmail.com · 5/10/2026, 6:08:49 PM

What’s new on peptideprice: payment filters and sterility testing tiers from derekpruski@substack.com on 2026-05-10T22:08:49.000Z — USP 71. This is the gold standard. Two-week growth test. Worth a full point in the testing score. Sterility (PCR / rapid) — DNA-based, hours instead of weeks. Newer technology, but still a real sterility check. Worth half a point. Bioburden (5 Day) — USP 61. This is not a sterility test. It counts microbes but doesn’t prove sterility. Worth half a point. The filters

What’s new on peptideprice: payment filters and sterility testing tiers

Score 0.908 · Account tjphuhs@gmail.com · 5/10/2026, 6:08:49 PM

What’s new on peptideprice: payment filters and sterility testing tiers from derekpruski@substack.com on 2026-05-10T22:08:49.000Z View this post on the web at https://derekpruski.substack.com/p/whats-new-on-peptideprice-payment A weekend of updates to make vendor comparison faster and more accurate. Spent this weekend pushing a round of updates to peptideprice.store [ https://substack.com/redirect/f76f57e4-54d0-49b1-9ca5-4e6208a623c9?j=eyJ1IjoiNGl3b2U2In0.sVDxRtmZ85v8kfdamY0krRXGMy3p768BWtuZifRB

Research Radar Ep. 1: Payments, Peptides & Proper Testing

Score 0.788 · Account tjphuhs@gmail.com · 4/3/2026, 10:19:48 AM

Research Radar Ep. 1: Payments, Peptides & Proper Testing from derekpruski@substack.com on 2026-04-03T14:19:48.000Z View this post on the web at https://derekpruski.substack.com/p/research-radar-ep-1-payments-peptides Topic 1: Payment processing in the research space One of the most persistent behind-the-scenes headaches for research companies right now is payment processing. Vendors have been cycling through as many as seven different processors trying to find one that’s both reliable and will

Peptidology Just Upgraded Their Testing Standard and Their Discount

Score 0.767 · Account tjphuhs@gmail.com · 4/8/2026, 12:15:30 PM

Peptidology Just Upgraded Their Testing Standard and Their Discount from derekpruski@substack.com on 2026-04-08T16:15:30.000Z that can identify contamination faster than traditional incubation. Running sterility at two independent labs, something no one else in the space is doing right now. The upgrade from 4 to 15 samples at Eagle is the biggest single jump in the new standard — 15 vials across two labs means a much higher level of confidence in the result. Most vendors in this space run a puri

Introducing Peptidology: Testing Taken To A New Level

Score 0.763 · Account tjphuhs@gmail.com · 3/24/2026, 11:15:15 AM

Introducing Peptidology: Testing Taken To A New Level from derekpruski@substack.com on 2026-03-24T15:15:15.000Z sold. They’re spending over $2,000 in testing per batch, and for future batches they’re sending in up to 20 vials for sterility testing alone. That’s not a vendor cutting corners to move product fast. That’s a vendor that’s built their entire operation around getting it right. Code DEREK is live at Peptidology for 15% off. https://peptidology.co/?ref=mxxyvdne [ https://substack.com/red

New Testing Standards at Southern Aminos

Score 0.761 · Account tjphuhs@gmail.com · 3/30/2026, 3:53:11 PM

New Testing Standards at Southern Aminos from derekpruski@substack.com on 2026-03-30T19:53:11.000Z Reaction) for sterility testing. PCR is a molecular method that detects the DNA or RNA of bacteria, fungi, and other contaminants directly, without waiting for them to grow in a culture. It’s a different methodology than the culture-based approach and operates on a faster timeline. Worth noting: PCR-based sterility is not currently a recognized compendial standard in the way USP 71 is — meaning it

Research Radar Ep. 1: Payments, Peptides & Proper Testing

Score 0.748 · Account tjphuhs@gmail.com · 4/3/2026, 10:19:48 AM

Research Radar Ep. 1: Payments, Peptides & Proper Testing from derekpruski@substack.com on 2026-04-03T14:19:48.000Z is a meaningful development. Holding alternative delivery formats to the same documentation standards as injectables raises the bar across the board and gives researchers more confidence when evaluating non-injectable options. Listener Q&A: RFK and the category 1 vs category 2 peptide reclassification Rick walked us through the regulatory background on RFK’s proposed reclassificati

Peptidology Just Upgraded Their Testing Standard and Their Discount

Score 0.745 · Account tjphuhs@gmail.com · 4/8/2026, 12:15:30 PM

Peptidology Just Upgraded Their Testing Standard and Their Discount from derekpruski@substack.com on 2026-04-08T16:15:30.000Z View this post on the web at https://derekpruski.substack.com/p/peptidology-just-upgraded-their-testing Peptidology Just Upgraded Their Testing Standard + 25% Off Sale Got a message with some details worth sharing. Peptidology has a large inventory, and it’s worth being transparent about where things stand — some products in their catalog currently only have 2x sterility

Next Gen Peptides is Live on the Price Tool

Score 0.741 · Account tjphuhs@gmail.com · 5/8/2026, 8:01:25 AM

Next Gen Peptides is Live on the Price Tool from derekpruski@substack.com on 2026-05-08T12:01:25.000Z View this post on the web at https://derekpruski.substack.com/p/next-gen-peptides-is-live-on-the Been a long time coming on this one. NG is officially added to PeptidePrice.store, and they came in with the kind of upgrade I want to see from a vendor launch. They’ve moved to full 7x testing with ILS Labs — Identification, Content, Sterility, Endotoxins, Heavy Metals, and Conformity Testing. That’

New Testing Standards at Southern Aminos

Score 0.734 · Account tjphuhs@gmail.com · 3/30/2026, 3:53:11 PM

New Testing Standards at Southern Aminos from derekpruski@substack.com on 2026-03-30T19:53:11.000Z View this post on the web at https://derekpruski.substack.com/p/new-testing-standards-at-southern Most vendors send one vial to a lab and call it a day. Southern Aminos is now running full testing across 10 vials per batch — and closing in on a 6.5/7 score on the PeptidePrice.store testing standard. That’s not a small thing. Here’s exactly what that means for your research. What Does “Full Peptide

Introducing Peptidology: Testing Taken To A New Level

Score 0.731 · Account tjphuhs@gmail.com · 3/24/2026, 11:15:15 AM

Introducing Peptidology: Testing Taken To A New Level from derekpruski@substack.com on 2026-03-24T15:15:15.000Z View this post on the web at https://derekpruski.substack.com/p/introducing-peptidology-testing-taken Without question the best-tested company I’ve come across in this space — and one of the first to do it at this level. Peptidology takes a different approach to the research space. Their goal is to do the maximum amount of testing possible to ensure their products are the highest quali

Peptidology Just Upgraded Their Testing Standard and Their Discount

Score 0.722 · Account tjphuhs@gmail.com · 4/8/2026, 12:15:30 PM

Peptidology Just Upgraded Their Testing Standard and Their Discount from derekpruski@substack.com on 2026-04-08T16:15:30.000Z is a test a lot of vendors skip entirely. ICP-MS Heavy Metals ICP-MS (Inductively Coupled Plasma Mass Spectrometry) screens for toxic heavy metals: lead, arsenic, cadmium, mercury, and chromium. These can enter a product through the raw materials used in synthesis or through manufacturing equipment. You won’t taste or see them, and they won’t show up on a purity test — wh

New on PeptidePrice.store: Step One Ventures

Score 0.718 · Account tjphuhs@gmail.com · 4/9/2026, 10:03:41 AM

New on PeptidePrice.store: Step One Ventures from derekpruski@substack.com on 2026-04-09T14:03:41.000Z View this post on the web at https://derekpruski.substack.com/p/new-on-peptidepricestore-step-one Research use only, not for human consumption. Step One Ventures is now live on PeptidePrice.store, and they bring something to the platform that not many vendors offer: raw powder ingredients for mixing your own topicals. For researchers who prefer to DIY their formulations rather than buying pre-m

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8%

Score 0.709 · Account tjphuhs@gmail.com · 3/26/2026, 11:39:40 AM

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8% from tjphuhs@gmail.com on 2026-03-26T15:39:40.000Z be analytically perfect and still have microbial contamination introduced during manufacturing. The argument “if purity is high, everything else is fine” doesn’t hold. > Sterility failures don’t automatically mean a vendor has bad practices. It means contamination is hard to eliminate entirely and even harder to detect consistently. What matters is whether the vendor is tes

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8%

Score 0.709 · Account oc.tjphuhs@gmail.com · 3/26/2026, 11:39:40 AM

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8% from tjphuhs@gmail.com on 2026-03-26T15:39:40.000Z be analytically perfect and still have microbial contamination introduced during manufacturing. The argument “if purity is high, everything else is fine” doesn’t hold. > Sterility failures don’t automatically mean a vendor has bad practices. It means contamination is hard to eliminate entirely and even harder to detect consistently. What matters is whether the vendor is tes

The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8%

Score 0.707 · Account tjphuhs@gmail.com · 3/26/2026, 8:49:21 AM

The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8% from derekpruski@substack.com on 2026-03-26T12:49:21.000Z are completely separate things. A peptide can be analytically perfect and still have microbial contamination introduced during manufacturing. The argument “if purity is high, everything else is fine” doesn’t hold. Sterility failures don’t automatically mean a vendor has bad practices. It means contamination is hard to eliminate entirely and even harder to detect consisten

Can You Filter Your Way Out of Failed Sterility?

Score 0.702 · Account tjphuhs@gmail.com · 3/30/2026, 12:48:22 PM

Can You Filter Your Way Out of Failed Sterility? from derekpruski@substack.com on 2026-03-30T16:48:22.000Z the process Why endotoxins are usually the bigger concern Living microorganisms require active multiplication to cause significant issues. A research subject’s immune response can often handle small amounts, and refrigerated storage slows growth considerably. Endotoxins operate differently. They don’t need to be alive to cause problems. They trigger immediate inflammatory responses, are pot

Sterility Testing vs. Bioburden Testing — These Are Not the Same Thing

Score 0.698 · Account tjphuhs@gmail.com · 3/24/2026, 2:28:13 PM

Sterility Testing vs. Bioburden Testing — These Are Not the Same Thing from derekpruski@substack.com on 2026-03-24T18:28:13.000Z View this post on the web at https://derekpruski.substack.com/p/sterility-testing-vs-bioburden-testing And a lot of vendors are getting this wrong. This is one of the most important quality topics in the research peptide space right now, and it’s being misrepresented badly — by vendors, and in some cases by the labs themselves. I’ll be upfront: I just learned the full

Fwd: BAC Water Amazon Testing — March 2026 | Only 2 of 11 Passed | Data Shared by Peptide Crafters

Score 0.694 · Account oc.tjphuhs@gmail.com · 3/18/2026, 9:54:30 AM

Fwd: BAC Water Amazon Testing — March 2026 | Only 2 of 11 Passed | Data Shared by Peptide Crafters from tjphuhs@gmail.com on 2026-03-18T13:54:30.000Z in potency happens gradually. You won’t necessarily know until your results don’t make sense or your vial clouds up. Hospira BAC water has a long track record, known specs, and is what most legitimate research operations reach for by default. It’s not the only acceptable option, but it’s the standard for a reason. The cost difference between Hospir

Website Overhaul, New Products, & More!

Score 0.692 · Account tjphuhs@gmail.com · 5/12/2026, 11:50:27 AM

Website Overhaul, New Products, & More! from info@peptidesupplyco.com on 2026-05-12T15:50:27.000Z -- Tesamorelin 13mg + IPA 3mg -------------------------- -------------------------- -------------------------- Fresh COAs with Endotoxin Testing ================================= ####New Batch! Tesa/IPA ======== Single Vial - $90 ----------------- 3Pack - $250 ------------ 5Pack - $380 ------------ 10Pack - $675 ------------- [ Shop Now](https://llfo0.r.a.d.sendibm1.com/mk/cl/f/sh/1t6Af4OiGsE8LUOqmi

New Peptide Pro Packaging Is Coming

Score 0.691 · Account tjphuhs@gmail.com · 5/14/2026, 11:02:39 AM

New Peptide Pro Packaging Is Coming from info@peptidepro.io on 2026-05-14T15:02:39.000Z Custom magnetic boxes and travel cases are on the way. This email was sent to you as HTML-only. To view it, please visit: https://kox.soundestlink.com/ce/v/68af5e831f995359316587ea/6a025420bd5f9efdd01acfb1 ************************** Make sure you keep getting our latest offers and add info@peptidepro.io to your address book. Unsubscribe https://kox.soundestlink.com/contactsPreferences/v2/unsubscribe/?b=67292d

Re: peptide_testing - Sample Submission

Score 0.690 · Account tjphuhs@gmail.com · 2/13/2026, 6:07:10 PM

Re: peptide_testing - Sample Submission from contact@bioregen.com on 2026-02-13T23:07:10.000Z Hi TJ, hank you for reaching out to BioRegen regarding testing services. We’re happy to assist with the testing of the sample. Please find the attached shipping form, which we kindly ask you to include with the samples you send. Our shipping address is listed at the bottom of the form for your convenience. You can also send your submission here: Sample Submission Link<https://reports.bioregen.com/sendsa

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8%

Score 0.689 · Account oc.tjphuhs@gmail.com · 3/26/2026, 11:39:40 AM

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8% from tjphuhs@gmail.com on 2026-03-26T15:39:40.000Z What sterility testing is detecting is contamination — and contamination is not uniform. > Think of it like this: if you dropped a single grain of dirt into a swimming pool, some water samples would test positive and some would test negative depending on where you pulled from. The contamination exists somewhere, but it’s not evenly distributed. > A few mechanisms that expla

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8%

Score 0.689 · Account tjphuhs@gmail.com · 3/26/2026, 11:39:40 AM

Fwd: The Test That's Actually Failing - 3 of 6 Failed Sterility at 99.8% from tjphuhs@gmail.com on 2026-03-26T15:39:40.000Z What sterility testing is detecting is contamination — and contamination is not uniform. > Think of it like this: if you dropped a single grain of dirt into a swimming pool, some water samples would test positive and some would test negative depending on where you pulled from. The contamination exists somewhere, but it’s not evenly distributed. > A few mechanisms that expla

Sterility Testing vs. Bioburden Testing — These Are Not the Same Thing

Score 0.689 · Account tjphuhs@gmail.com · 3/24/2026, 2:28:13 PM

Sterility Testing vs. Bioburden Testing — These Are Not the Same Thing from derekpruski@substack.com on 2026-03-24T18:28:13.000Z not designed to. Presenting it as such is misleading at best — and a genuine risk to the integrity of the RUO space at worst. Why This Matters Labs that conduct rigorous USP 71 testing across multiple vials per batch consistently find that a meaningful percentage of research products fail — non-sterile vials slipping through batches that likely cleared a bioburden scre