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    <title>Eppix Labs — Peptide Research</title>
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    <description>Independent batch verification, certificate literacy and peptide research from Eppix Labs. For laboratory research use only.</description>
    <language>en-US</language>
    <lastBuildDate>Mon, 12 Oct 2026 07:34:53 GMT</lastBuildDate>
    <item>
      <title>How to Vet a US Research Peptide Supplier in 2026: A 12-Point Checklist</title>
      <link>https://www.eppixlabs.com/peptide-research/us-research-peptide-supplier-checklist-2026</link>
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      <pubDate>Fri, 02 Oct 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>A 12-point checklist for US labs choosing a research peptide supplier in 2026: batch COAs, identity testing, endotoxin, compliance and shipping.</description>
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      <title>Cagrilintide and Amylin Receptor Research: From Phase 2 to REDEFINE 1</title>
      <link>https://www.eppixlabs.com/peptide-research/cagrilintide-amylin-receptor-research</link>
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      <pubDate>Wed, 30 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>What cagrilintide is, how amylin and calcitonin receptors work, and what the phase 2 Lancet trial and REDEFINE 1 in NEJM reported. Research summary for US labs.</description>
    </item>
    <item>
      <title>Retatrutide in 2026: The TRIUMPH Phase 3 Program and What &quot;Investigational&quot; Means</title>
      <link>https://www.eppixlabs.com/peptide-research/retatrutide-triumph-phase-3-2026</link>
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      <pubDate>Mon, 28 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Retatrutide&apos;s 2026 TRIUMPH phase 3 readouts, its triple-receptor pharmacology, and its investigational, unapproved US status.</description>
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    <item>
      <title>GLP-1, GIP and Glucagon Receptor Pharmacology: Mono-, Dual- and Triple-Agonist Peptides Compared</title>
      <link>https://www.eppixlabs.com/peptide-research/glp1-gip-glucagon-receptor-pharmacology-compared</link>
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      <pubDate>Sat, 26 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Comparison</category>
      <description>How semaglutide, tirzepatide and retatrutide differ at the receptor level, from potency balance to biased signaling, plus assay design notes for in vitro labs.</description>
    </item>
    <item>
      <title>Tesamorelin as a Research Reference: What an FDA-Approved GHRH Analog Tells Us About the Class</title>
      <link>https://www.eppixlabs.com/peptide-research/tesamorelin-ghrh-analog-research-reference</link>
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      <pubDate>Fri, 25 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Tesamorelin is the GHRH analog with a current FDA approval. Its structure, the NEJM trial behind its 2010 approval, and its use as a research reference.</description>
    </item>
    <item>
      <title>Semax Research in the US: An ACTH(4-10) Analog After the 2026 PCAC Vote</title>
      <link>https://www.eppixlabs.com/peptide-research/semax-acth-analog-research-us</link>
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      <pubDate>Wed, 23 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Semax is a heptapeptide ACTH(4-10) analog studied for BDNF signaling. Its structure, key research, and US status after the 2026 PCAC vote.</description>
    </item>
    <item>
      <title>Epitalon and Telomerase Research: What the Studies Show and How to Verify Your Material</title>
      <link>https://www.eppixlabs.com/peptide-research/epitalon-telomerase-research-review</link>
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      <pubDate>Mon, 21 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Epitalon (AEDG) is a tetrapeptide studied for telomerase activity. Key studies, their limits, US status after PCAC, and identity checks.</description>
    </item>
    <item>
      <title>GHK-Cu Research: Copper Complexation, Gene-Expression Data and the US Route Question</title>
      <link>https://www.eppixlabs.com/peptide-research/ghk-cu-copper-peptide-research-us</link>
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      <pubDate>Sat, 19 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>GHK-Cu is a copper-binding tripeptide studied in skin and tissue models. Its chemistry, the gene-expression research, and why its US status differs by route.</description>
    </item>
    <item>
      <title>MOTS-c Research Primer: A Mitochondrial-Encoded Peptide After the 2026 PCAC Review</title>
      <link>https://www.eppixlabs.com/peptide-research/mots-c-mitochondrial-peptide-research-primer</link>
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      <pubDate>Thu, 17 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>MOTS-c is a 16-residue peptide encoded in mitochondrial DNA. Key studies from Cell Metabolism and Nature Communications, mechanisms, and US status after PCAC.</description>
    </item>
    <item>
      <title>TB-500 vs Thymosin Beta-4 vs Ac-SDKP: Three Molecules Sold Under One Name</title>
      <link>https://www.eppixlabs.com/peptide-research/tb-500-vs-thymosin-beta-4-vs-ac-sdkp</link>
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      <pubDate>Tue, 15 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Comparison</category>
      <description>&quot;TB-500&quot; can mean full-length thymosin beta-4 or a short fragment. How to tell them apart by sequence and mass, and why it matters.</description>
    </item>
    <item>
      <title>BPC-157 in the US, 2026: Regulatory Status and What the Preclinical Literature Supports</title>
      <link>https://www.eppixlabs.com/peptide-research/bpc-157-us-status-evidence-2026</link>
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      <pubDate>Mon, 14 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Where BPC-157 stands with the FDA after the 2026 Category 2 removal and PCAC vote, and an honest map of what the preclinical research does and doesn&apos;t show.</description>
    </item>
    <item>
      <title>Peptide Reconstitution Math for the Lab: Concentration, Molarity, Dilution and Aliquots (Worked Examples)</title>
      <link>https://www.eppixlabs.com/peptide-research/peptide-reconstitution-math-worked-examples</link>
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      <pubDate>Sat, 12 Sep 2026 00:00:00 GMT</pubDate>
      <category>Laboratory Practice</category>
      <description>Step-by-step peptide math for research labs: mg/mL, molarity from molecular weight, C1V1 = C2V2 dilutions and aliquot planning, with worked examples.</description>
    </item>
    <item>
      <title>Shipping and Storing Lyophilized Peptides in the US: Heat, Transit Time and What to Do on Arrival</title>
      <link>https://www.eppixlabs.com/peptide-research/lyophilized-peptide-shipping-storage-us</link>
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      <pubDate>Thu, 10 Sep 2026 00:00:00 GMT</pubDate>
      <category>Laboratory Practice</category>
      <description>How heat, humidity and transit time affect lyophilized peptides shipped across the US, and a receiving and storage protocol for research labs.</description>
    </item>
    <item>
      <title>Endotoxin Testing for Research Peptides: LAL, rFC and What an EU/mg Result Means</title>
      <link>https://www.eppixlabs.com/peptide-research/endotoxin-lal-testing-research-peptides-us</link>
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      <pubDate>Tue, 08 Sep 2026 00:00:00 GMT</pubDate>
      <category>Verification Guide</category>
      <description>Why endotoxin contamination can ruin cell and animal studies, how LAL and recombinant factor C assays work, and how to read EU/mg results on a peptide COA.</description>
    </item>
    <item>
      <title>How to Read a Janoshik Certificate of Analysis: A Line-by-Line Guide for US Labs</title>
      <link>https://www.eppixlabs.com/peptide-research/how-to-read-janoshik-coa-us</link>
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      <pubDate>Sun, 06 Sep 2026 00:00:00 GMT</pubDate>
      <category>Verification Guide</category>
      <description>What each field on a Janoshik Analytical peptide COA means, how to verify it independently, and the red flags that should stop a lab from using a lot.</description>
    </item>
    <item>
      <title>HPLC Purity vs Net Peptide Content: Why a 99% Pure Vial Isn&apos;t 99% Peptide</title>
      <link>https://www.eppixlabs.com/peptide-research/hplc-purity-vs-net-peptide-content</link>
      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/hplc-purity-vs-net-peptide-content</guid>
      <pubDate>Fri, 04 Sep 2026 00:00:00 GMT</pubDate>
      <category>Verification Guide</category>
      <description>HPLC purity and net peptide content measure different things. What each number means, why counterions and water matter, and how to calculate real concentration.</description>
    </item>
    <item>
      <title>503A vs 503B vs RUO: The Three US Peptide Supply Chains, Compared</title>
      <link>https://www.eppixlabs.com/peptide-research/503a-503b-ruo-peptide-supply-chain-us</link>
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      <pubDate>Thu, 03 Sep 2026 00:00:00 GMT</pubDate>
      <category>Regulatory</category>
      <description>Compounding pharmacies, outsourcing facilities and research reagent suppliers operate under very different US rules. A side-by-side guide for labs.</description>
    </item>
    <item>
      <title>What &quot;Research Use Only&quot; Actually Means in the US After the 2026 FDA Warning Letters</title>
      <link>https://www.eppixlabs.com/peptide-research/research-use-only-meaning-us-fda-2026</link>
      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/research-use-only-meaning-us-fda-2026</guid>
      <pubDate>Tue, 01 Sep 2026 00:00:00 GMT</pubDate>
      <category>Regulatory</category>
      <description>An RUO label alone doesn&apos;t protect a seller. How the FDA&apos;s intended-use doctrine works and what the March 2026 warning letters cited.</description>
    </item>
    <item>
      <title>The July 2026 FDA PCAC Peptide Vote: What It Does and Doesn&apos;t Change for US Researchers</title>
      <link>https://www.eppixlabs.com/peptide-research/fda-pcac-july-2026-peptide-vote-us</link>
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      <pubDate>Sun, 30 Aug 2026 00:00:00 GMT</pubDate>
      <category>Regulatory</category>
      <description>The FDA&apos;s compounding advisory committee backed 6 of 7 peptides in July 2026. What the non-binding vote means for US research labs and RUO buyers.</description>
    </item>
    <item>
      <title>FDA&apos;s April 2026 Category 2 Removals Explained: 12 Peptides, Zero Approvals</title>
      <link>https://www.eppixlabs.com/peptide-research/fda-category-2-removal-april-2026</link>
      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/fda-category-2-removal-april-2026</guid>
      <pubDate>Fri, 28 Aug 2026 00:00:00 GMT</pubDate>
      <category>Regulatory</category>
      <description>On April 15, 2026 the FDA announced 12 peptides would leave its Category 2 list. What that changed, what it didn&apos;t, and why removal isn&apos;t a green light.</description>
    </item>
    <item>
      <title>5-Amino-1MQ in the US: The NNMT Inhibitor That Is Not a Peptide</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-5-amino-1mq-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying 5-Amino-1MQ in the US for laboratory research: the small-molecule NNMT inhibitor, what the published enzyme and obesity-model literature reports, why its certificate differs from a peptide certificate, and how to verify a batch.</description>
    </item>
    <item>
      <title>Purity vs Fill Accuracy: Why One Number Is Not Enough</title>
      <link>https://www.eppixlabs.com/peptide-research/purity-vs-fill-accuracy</link>
      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/purity-vs-fill-accuracy</guid>
      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
      <category>Verification Guide</category>
      <description>Purity tells you what fraction of the powder in a vial is the target compound. Fill accuracy tells you how much powder is there. They are independent measurements, a vial can pass one and fail the other, and almost every research-peptide supplier publishes only one of them.</description>
    </item>
    <item>
      <title>How to Read a Certificate of Analysis</title>
      <link>https://www.eppixlabs.com/peptide-research/how-to-read-a-certificate-of-analysis</link>
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      <pubDate>Mon, 24 Aug 2026 00:00:00 GMT</pubDate>
      <category>Verification Guide</category>
      <description>A practical guide to reading a peptide Certificate of Analysis: what HPLC purity actually measures, why measured mass matters as much as purity, how to tell a batch-linked COA from a decorative one, and the specific checks that catch a document which proves nothing.</description>
    </item>
    <item>
      <title>NAD+ in the US: The Coenzyme, Not a Peptide</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-nad-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>NAD+ in the US for laboratory research: what the coenzyme does, what the NAD-boosting literature reports, why a NAD+ certificate reports content rather than HPLC purity, and how to verify a batch.</description>
    </item>
    <item>
      <title>Thymosin Alpha-1 in the US: The Immune Peptide With Real Approvals Elsewhere</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-thymosin-alpha-1-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying thymosin alpha-1 in the US for laboratory research: the thymic peptide, what the hepatitis and immune-modulation literature reports, why its approvals elsewhere do not transfer, and how to verify a batch.</description>
    </item>
    <item>
      <title>Are Peptides Legal in the US? A Plain-Language Overview</title>
      <link>https://www.eppixlabs.com/peptide-research/are-peptides-legal-in-the-us</link>
      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/are-peptides-legal-in-the-us</guid>
      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Regulatory</category>
      <description>The legal status of research peptides in the United States: how the Federal Food, Drug, and Cosmetic Act applies, what research-use-only actually means, where the Controlled Substances Act does and does not reach, and what the July 2026 FDA advisory vote did.</description>
    </item>
    <item>
      <title>BPC-157 vs TB-500: The Research Comparison</title>
      <link>https://www.eppixlabs.com/peptide-research/bpc-157-vs-tb-500</link>
      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/bpc-157-vs-tb-500</guid>
      <pubDate>Sun, 13 Sep 2026 00:00:00 GMT</pubDate>
      <category>Compound Comparison</category>
      <description>BPC-157 and TB-500 compared on origin, mechanism, evidence quality and verification: what each is, what the published literature actually supports for each, and where the naming problem sits.</description>
    </item>
    <item>
      <title>Epitalon in the US: The Telomerase Claim, Examined</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-epitalon-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying epitalon (AEDG) in the US for laboratory research: what the telomerase and pineal literature actually reports, why independent replication matters here more than anywhere, the July 2026 FDA advisory vote, and how to verify a batch.</description>
    </item>
    <item>
      <title>MOTS-c in the US: The Mitochondrial-Derived Peptide</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-mots-c-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>MOTS-c in the US for laboratory research: what the mitochondrial-derived peptide is, what the AMPK and exercise literature reports, what the July 2026 FDA advisory vote changed, and how to verify a batch.</description>
    </item>
    <item>
      <title>KPV in the US: The α-MSH Fragment in Inflammation Research</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-kpv-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>KPV in the US for laboratory research: the alpha-MSH C-terminal tripeptide, the PepT1 colitis literature, what the July 2026 FDA advisory vote did and did not do, and how to verify a batch before ordering.</description>
    </item>
    <item>
      <title>Tirzepatide: A Research Literature Overview</title>
      <link>https://www.eppixlabs.com/peptide-research/tirzepatide</link>
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      <pubDate>Fri, 31 Jul 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Educational overview of tirzepatide (LY3298176): chemical identity, structural design, dual incretin receptor pharmacology, published research literature, laboratory handling, and U.S. regulatory status. For laboratory research use only.</description>
    </item>
    <item>
      <title>TB-500 in the US: Synthetic Thymosin β4, Tested by Batch</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-tb-500-usa</link>
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      <pubDate>Sun, 13 Sep 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying TB-500 in the US for laboratory research: synthetic thymosin beta-4, how it differs from the 17-23 fragment sold under the same name, the July 2026 FDA advisory vote, and how to verify batch purity and measured content.</description>
    </item>
    <item>
      <title>BPC-157 in the US: Purity, Batch Certificates and What to Check</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-bpc-157-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying BPC-157 in the US for laboratory research: the pentadecapeptide evidence base, what the July 2026 FDA advisory vote did and did not change, and how to read a batch certificate before you order.</description>
    </item>
    <item>
      <title>Selank in the US: The Tuftsin Analog From the Russian Literature</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-selank-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying selank in the US for laboratory research: the tuftsin-analog heptapeptide, what the Russian anxiolytic literature reports, why the evidence base is hard to audit from outside, and how to verify a batch.</description>
    </item>
    <item>
      <title>Cagrilintide in the US: The Long-Acting Amylin Analog</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-cagrilintide-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying cagrilintide in the US for laboratory research: the long-acting amylin analog, what the phase 1b and phase 2 trials reported alone and with semaglutide, and how to verify a batch.</description>
    </item>
    <item>
      <title>Tesamorelin in the US: The GHRH Analog With Approved-Drug Data</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-tesamorelin-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying tesamorelin in the US for laboratory research: the stabilized GHRH(1-44) analog, what the HIV lipodystrophy and NAFLD trials reported, and how to verify batch purity and measured content.</description>
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    <item>
      <title>Eloralintide in the US: The Selective Amylin Agonist</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-eloralintide-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying eloralintide in the US for laboratory research: Lilly&apos;s selective amylin receptor agonist, what the published phase 1 and phase 2 trials reported, how it differs from cagrilintide, and why identity testing matters most for a frontier compound.</description>
    </item>
    <item>
      <title>Sermorelin in the US: GHRH(1-29), and the Approval That Was Withdrawn</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-sermorelin-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying sermorelin in the US for laboratory research: the GHRH(1-29) fragment, its history as an approved agent, why the approval lapsed, and how to verify batch purity and measured content.</description>
    </item>
    <item>
      <title>Ipamorelin in the US: The Selective Secretagogue</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-ipamorelin-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying ipamorelin in the US for laboratory research: the selective ghrelin-receptor agonist, what the 1998 characterization and the bone-model literature reported, and how to verify batch purity and measured content.</description>
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    <item>
      <title>Retatrutide vs Tirzepatide: Triple Against Dual</title>
      <link>https://www.eppixlabs.com/peptide-research/retatrutide-vs-tirzepatide</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Compound Comparison</category>
      <description>Retatrutide and tirzepatide compared on receptor pharmacology, published trial depth, regulatory status and verification: what adding glucagon-receptor agonism does, and what the evidence supports for each.</description>
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    <item>
      <title>Retatrutide in the US: The Triple Agonist, and What Is Actually Published</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-retatrutide-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying retatrutide in the US for laboratory research: what the GIP, GLP-1 and glucagon triple agonist is, what the published phase 2 trials reported, why identity testing matters at this molecular size, and how to verify a batch.</description>
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    <item>
      <title>BPC-157: A Research Literature Overview</title>
      <link>https://www.eppixlabs.com/peptide-research/bpc-157</link>
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      <pubDate>Fri, 29 May 2026 00:00:00 GMT</pubDate>
      <category>Compound Overview</category>
      <description>Educational overview of BPC-157 (Pentadecapeptide BPC 157, Body Protection Compound-157): chemical identity, origin, peer-reviewed research literature, laboratory handling, and U.S. regulatory status. For laboratory research use only.</description>
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    <item>
      <title>CJC-1295 and Ipamorelin in the US: The Blend, and What Each Half Does</title>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>CJC-1295 and ipamorelin in the US for laboratory research: what each compound does, the difference between DAC and no-DAC forms, why blend certificates report two masses and no purity, and how to verify a batch.</description>
    </item>
    <item>
      <title>Semaglutide vs Tirzepatide: The Only Head-to-Head Trial in the Class</title>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Compound Comparison</category>
      <description>Semaglutide and tirzepatide compared on receptor pharmacology and published evidence, including SURPASS-2, the only direct randomized head-to-head trial between them.</description>
    </item>
    <item>
      <title>Tirzepatide in the US: Research-Grade, and How It Differs From the Pharmacy Product</title>
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      <guid isPermaLink="true">https://www.eppixlabs.com/peptide-research/buy-tirzepatide-usa</guid>
      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying tirzepatide in the US for laboratory research: how research-grade material differs from the approved pharmacy product, what the SURPASS and SURMOUNT trials reported, and how to verify batch purity and measured content.</description>
    </item>
    <item>
      <title>Semaglutide in the US: Research-Grade, Verified by Batch</title>
      <link>https://www.eppixlabs.com/peptide-research/buy-semaglutide-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying research-grade semaglutide in the US: how it differs from the pharmacy product, what the STEP, SUSTAIN and SELECT trials reported, why the peptide backbone matters for identity testing, and how to verify a batch.</description>
    </item>
    <item>
      <title>How to Choose a Peptide Supplier in the US: A Nine-Point Checklist</title>
      <link>https://www.eppixlabs.com/peptide-research/how-to-choose-a-peptide-supplier-usa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>A nine-point due-diligence checklist for US research peptide suppliers: batch testing, published certificates, verification paths, measured content, domestic stock, compliance posture, pricing and support.</description>
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    <item>
      <title>Janoshik Testing Explained: How Every Eppix Batch Is Verified</title>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Verification</category>
      <description>What Janoshik Analytical tests, what an HPLC purity figure and a mass-spectrometry content figure each mean, how the certificate verification key works, and how every Eppix batch moves through the pipeline.</description>
    </item>
    <item>
      <title>GHK-Cu in the US: The Copper Peptide, and Why the Copper Is the Hard Part</title>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Sourcing Guide</category>
      <description>Buying GHK-Cu copper peptide in the US for laboratory research: what the glycyl-histidyl-lysine copper complex is, what the published literature supports, why copper stoichiometry is the quality issue, and how to verify a batch.</description>
    </item>
    <item>
      <title>How to Spot a Fake Peptide COA: Seven Red Flags</title>
      <link>https://www.eppixlabs.com/peptide-research/how-to-spot-a-fake-coa</link>
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      <pubDate>Thu, 27 Aug 2026 00:00:00 GMT</pubDate>
      <category>Verification</category>
      <description>Seven ways a peptide certificate of analysis misleads: recycled lots, missing batch numbers, absent verification paths, purity without content, wrong client names, edited images and impossible numbers.</description>
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