Peptide 101
A technical resource site: peptide chemistry, documentation and testing standards, clinical evidence, and publicly reported safety data — written in plain English for patients and clinicians.
“Research use only” is a warning, not a technicality. Learn what to ask before anything goes into your body.
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In the library
CJC-1295 / Ipamorelin: A Compelling Case
Built for solution stability, two receptor pathways, a stronger GH pulse and a longer half-life than sermorelin. A peptide chemist makes the CMC case against sermorelin and tesamorelin, residue by residue, and shows where the evidence stops.
Read the white paper →NAD+ Injections vs. IV Drips vs. Supplements
Three ways to take NAD+, three very different products. What each route delivers, what the human evidence actually shows, and five quality questions to ask before you start, because NAD+ is a fragile molecule.
Read the article →Where Your Peptide Comes From: 503A Pharmacy vs. Research Grade
Same name on the label, different material in the vial. What the law requires of a pharmacy’s peptide, the GMP specification it’s released on, and how the finished vial is tested, compared step by step with a research-grade vial.
Read the article →Retatrutide: What Lilly’s Trials Show vs. What Gray-Market Users Report
In Lilly’s trials, the top side effect was nausea. Among gray-market users on Reddit, it was hunger. A peptide chemist compares the trial data with what people injecting “research use only” vials report, and explains why the vial matters as much as the molecule.
Read the article →HPLC Purity, Explained: What “99% Pure” Really Tells You
Two vials can both read 99.1% pure. A peptide chemist explains what HPLC purity measures, how a fast method hides impurities under the main peak, and what to ask for instead.
Read the article →Tirzepatide, Not Just for Weight Loss
Four FDA approvals and what the large trials found for blood pressure, the heart, sleep apnea, the liver and diabetes prevention — plus what happened when tirzepatide and semaglutide were tested head to head.
Read the article →Semaglutide, Beyond the Scale
What the large randomized trials found for the heart, kidneys, liver and joints — the actual numbers, which doses and patients were studied, and what the results don’t tell you.
Read the article →Why Your Peptide Comes in a Vial, Not a Pill
Most therapeutic peptides reach about 1–2% oral bioavailability at best. What happens to a peptide you swallow, what it took to make oral semaglutide work, and why route of administration should follow the evidence.
Read the article →Sermorelin vs. Tesamorelin: Same Signal, Different Molecules
Both peptides tell your pituitary to make its own growth hormone. A peptide chemist explains how they differ in structure, clinical evidence, and how hard they are to manufacture well.
Read the article →Are Research-Grade Peptides Safe for Humans?
Why products labeled “research use only” are not made, tested, or dispensed for human use — and what a licensed 503A pharmacy does differently.
Read the article →What's Actually in Your Vial — And How to Tell
A side-by-side comparison of grey-market, research-market, and GMP/pharmacy-release documentation — what's tested at each tier, and why purity alone isn't a safety profile.
Read the comparison →Public Safety Reporting: Unregulated Peptide Sourcing
A compiled reference of publicly available government health alerts, regulatory data, and peer-reviewed case reports on unregulated peptide products, across five jurisdictions.
View the reference PDF →
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