Vol. 4, No. 40 — Week of October 27
Independent research-compound journalism, since 2022
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Vol. 4, No. 40
Week of October 27, 2026
Industry
A Year of Reporting on This Industry: What's Actually Changed
Dana Whitfield · 10 min read
Science
Gonadorelin: The Peptide Buyers Use Alongside Other Compounds
Marcus Ihejirika · 7 min read
Science
LL-37: The Antimicrobial Peptide Crossing Into Wound Care
Marcus Ihejirika · 6 min read
Investigation
FOXO4-DRI: The Senolytic Peptide Still Mostly in Mice
Dana Whitfield · 8 min read
Practical
Gauging a Vendor's Transparency: A Practical Checklist
Sarah Okonjo-Lund · 8 min read
Industry
Why Research-Compound Advertising Keeps Getting Deplatformed
Sarah Okonjo-Lund · 8 min read
Explainer
The Difference Between a Recall and a Voluntary Pull
Dana Whitfield · 6 min read
Investigation
What Happens to Unsold Inventory When a Vendor Closes
Dana Whitfield · 9 min read
Explainer
Reading an SDS (Safety Data Sheet) for a Peptide Product
Dana Whitfield · 6 min read
Science
Pentadeca Arginate (PDA): BPC-157's Stabilized Successor?
Marcus Ihejirika · 7 min read
Vol. 4, No. 39
Week of October 20, 2026
Science
Cagrilintide: The Amylin Analog Being Paired With Semaglutide
Marcus Ihejirika · 8 min read
Science
Survodutide: Another GLP-1/Glucagon Dual Agonist in the Pipeline
Marcus Ihejirika · 7 min read
Science
Klotho and the Anti-Aging Protein Claim
Marcus Ihejirika · 8 min read
Science
VIP (Vasoactive Intestinal Peptide): A Real Hormone With an Expanding, Less-Verified Set of Claims
Dana Whitfield · 7 min read
Science
Thymalin: The Companion Peptide From the Same Research Lineage as Epitalon
Marcus Ihejirika · 6 min read
Industry
The Economics of Running a Small Peptide Vendor
Sarah Okonjo-Lund · 9 min read
Practical
Vial Sizes and Why They Vary So Much Between Brands
Sarah Okonjo-Lund · 6 min read
Explainer
What a Real Adverse Event Report Would Actually Require
Dana Whitfield · 7 min read
Investigation
P21: The Nootropic With Almost No Human Data
Dana Whitfield · 9 min read
Science
Cerebrolysin: An Old Compound With a New Audience
Marcus Ihejirika · 7 min read
Vol. 4, No. 38
Week of October 13, 2026
Science
Larazotide: The Tight-Junction Peptide Studied for Celiac Disease, Repurposed for Gut Health Claims
Marcus Ihejirika · 7 min read
Science
Humanin: Another Mitochondrial Peptide, a Different Research Story Than MOTS-c
Marcus Ihejirika · 7 min read
Science
ARA-290: Derived From Erythropoietin, Studied for Nerve Pain — Without EPO's Side Effects
Marcus Ihejirika · 6 min read
Science
Oxytocin as a Research Compound: An Approved Hormone, an Unapproved Use Case
Dana Whitfield · 7 min read
Practical
Why Some Peptides Need Refrigeration and Others Don't
Sarah Okonjo-Lund · 6 min read
Industry
The Role of Third-Party Payment Apps in This Market, and Why They Keep Disappearing
Sarah Okonjo-Lund · 8 min read
Explainer
Reading a Mass Spec Report, Explained
Dana Whitfield · 7 min read
Explainer
Multi-Peptide Blends: What You're Actually Buying in One Vial
Dana Whitfield · 7 min read
Science
Hexarelin: The Secretagogue With a Cardioprotective Side Story
Marcus Ihejirika · 7 min read
Investigation
How a Vendor Actually Gets Added to a Community “Trusted List”
Dana Whitfield · 10 min read
Vol. 4, No. 37
Week of October 6, 2026
Science
5-Amino-1MQ: The NNMT Inhibitor Marketed as a Fat-Loss Compound
Marcus Ihejirika · 7 min read
Science
MOTS-c: The Peptide Your Mitochondria Already Make
Marcus Ihejirika · 8 min read
Science
Follistatin-344 and the Myostatin-Inhibition Claim
Marcus Ihejirika · 8 min read
Science
Kisspeptin-10: The Reproductive-Axis Peptide With a Narrow Research Base
Marcus Ihejirika · 6 min read
Explainer
Oral vs. Injectable BPC-157: Does the Capsule Version Actually Work the Same Way?
Dana Whitfield · 7 min read
Industry
The Research-Chemical Import Problem: Why So Much of This Supply Chain Runs Through a Handful of Countries
Sarah Okonjo-Lund · 8 min read
Practical
How Vendors Price the Same Peptide Differently — and What the Spread Actually Tells You
Sarah Okonjo-Lund · 7 min read
Explainer
Batch Testing Frequency, Explained: How Often Should a Seller Actually Retest?
Dana Whitfield · 6 min read
Practical
The Community Glossary: Jargon This Newsletter Keeps Having to Define
Sarah Okonjo-Lund · 6 min read
Science
GHRP-2 and GHRP-6: The Older Generation of Growth Hormone Secretagogues
Marcus Ihejirika · 7 min read
Vol. 4, No. 36
Week of September 29, 2026
Science
PT-141 and Bremelanotide: The Melanocortin Pathway, Explained
Marcus Ihejirika · 8 min read
Science
Thymosin Alpha-1: The Immune-Modulating Peptide With an Actual Approved Drug Behind It
Marcus Ihejirika · 7 min read
Investigation
AOD-9604: The Fat-Loss Fragment That Failed Its Own Clinical Trial
Dana Whitfield · 8 min read
Science
Epitalon and the Pineal Gland Longevity Claim: What the Original Russian Research Actually Says
Marcus Ihejirika · 9 min read
Explainer
Endotoxin Testing, Explained: What an LAL Result Actually Certifies
Dana Whitfield · 6 min read
Explainer
The “Research Use Only” Label, Explained: What It Means and What It Doesn't
Dana Whitfield · 6 min read
Industry
Why Most Research-Compound Sellers Can't Get Product Liability Insurance
Sarah Okonjo-Lund · 8 min read
Practical
Do Temperature Indicator Stickers Actually Tell You Anything? We Tested a Few.
Sarah Okonjo-Lund · 7 min read
Practical
Inside the DIY Dosing Log: Why So Many Buyers Track Everything in a Spreadsheet
Sarah Okonjo-Lund · 6 min read
Science
SNAP-8: The Cosmetic-Industry Peptide That Crossed Over Into Research-Compound Marketing
Marcus Ihejirika · 7 min read
Vol. 4, No. 35
Week of September 22, 2026
Science
TB-500: The Other Half of the Wolverine Stack, Explained on Its Own
Marcus Ihejirika · 7 min read
Science
Melanotan II: The Tanning Peptide With a Complicated History
Dana Whitfield · 8 min read
Industry
White-Label Peptides: When Ten Different Brands Are the Same Vial
Sarah Okonjo-Lund · 8 min read
Science
DSIP and the Peptide With the Thinnest Paper Trail in This Newsletter’s Coverage
Marcus Ihejirika · 6 min read
Vol. 4, No. 34
Week of September 15, 2026
Science
Tesamorelin Is the One FDA-Approved Drug in This Whole Category — Here’s What Its Trials Actually Showed
Dana Whitfield · 8 min read
Science
The GHK-Cu Copper Peptide: Fifty Years of Wound-Healing Research
Marcus Ihejirika · 7 min read
Vol. 4, No. 33
Week of September 8, 2026
Investigation
The Purity Gap: Why Three Labs Can Test the Same Vial and Disagree
Dana Whitfield · 11 min read
Explainer
Inside a COA: Reading Past the Purity Percentage
Dana Whitfield · 6 min read
Industry
When a Supplier Goes Dark: A Buyer’s Postmortem
Sarah Okonjo-Lund · 8 min read
Science
GLP-1, GIP, and Now Glucagon: Anatomy of a Triple Agonist
Marcus Ihejirika · 9 min read
Q&A
A Sterility Lab Tech on What “Pending” Actually Means
Interview by Dana Whitfield · 5 min read
Science
BPC-157 and the Gut-Brain Axis: What the Rat Studies Actually Show
Marcus Ihejirika · 10 min read
Industry
The Cold Chain Problem Nobody Talks About
Sarah Okonjo-Lund · 7 min read
Practical
Reconstitution Math, Explained Once and For All
Dana Whitfield · 7 min read
Vol. 4, No. 32
Week of September 1, 2026
Science
Semaglutide, Tirzepatide, and the Triple Agonists: A Field Guide
Marcus Ihejirika · 8 min read
Industry
The Customs Problem: What Actually Happens When a Package Gets Flagged
Sarah Okonjo-Lund · 8 min read
Science
Ipamorelin and CJC-1295: Why They’re Almost Always Sold Together
Marcus Ihejirika · 7 min read
Vol. 4, No. 31
Week of August 25, 2026
Industry
Payment Processors Are Quietly Reshaping This Industry
Sarah Okonjo-Lund · 9 min read
Science
NAD+ and the Longevity Claim: Separating Mechanism from Marketing
Marcus Ihejirika · 8 min read
Practical
A Buyer’s Guide to Reading Vendor Reviews Skeptically
Dana Whitfield · 6 min read
Vol. 4, No. 30
Week of August 18, 2026
Science
KPV and the Quiet Rise of Anti-Inflammatory Peptides
Marcus Ihejirika · 7 min read
Practical
Storage Mistakes That Quietly Ruin a Good Batch
Dana Whitfield · 6 min read
Vol. 3, No. 48
Week of December 15, 2025
Investigation
Why We Started Testing Third-Party COAs Ourselves
Dana Whitfield · 9 min read
Science
Semax and Selank: The Nootropic Peptides Nobody Can Pronounce
Marcus Ihejirika · 8 min read