Peptide Guides & Glossary
Plain-English guides to research peptides, Certificates of Analysis, HPLC purity, endotoxin testing, and the third-party labs behind every COA.
New to research peptides? Start here. These plain-English guides explain the compounds people buy, how third-party lab testing actually works, and how to confirm what is in a vial before you trust it. Every guide links back into our independently scored vendor directory.
GLP-1 family & related compounds
GLP-1 family receptor agonists, a mitochondrial-derived peptide and a coenzyme, and what their COAs should prove.
Protein fragments & copper peptides
Synthetic fragments of larger proteins and hormones, plus the copper tripeptide, explained.
Growth hormone peptides
GHRH analogs and secretagogues, and how they differ from one another.
Analog, bioregulator & melanocortin peptides
Russian-developed analog and bioregulator peptides, plus melanocortin receptor agonists.
Handling & storage
The practical mechanics of working with research peptides safely.
Testing, COAs & labs
How third-party testing works and how to verify what is actually in a vial.