Buyer Guides
Vetting a peptide source, reading a certificate of analysis, and storing peptides once they arrive.
Where to buy peptides online, and how to judge who you are buying from
Where to buy peptides, read from the buyer's side: the seller types and formats you run into online, what buyers report going wrong, what lab testing of online peptides has found, how to read a COA, and the red flags worth walking away over.
How to read a peptide certificate of analysis
A certificate of analysis is only useful if you know what it should report and how it can mislead. Here is what a real peptide COA includes, how identity and purity testing differ, and the ways a COA can be faked or gamed.
How to tell if a peptide vendor is legit: a buyer’s checklist
A practical checklist for judging a peptide seller: a COA from a named third-party lab, batch match, contact and refund details, claims language and research-use-only labeling, plus what buyers report going wrong and what independent testing keeps finding.
Peptide storage and handling: did I ruin my peptides?
How lyophilized and reconstituted peptides degrade, what temperature, light, and bacteriostatic water actually do, how to read shelf life, and what buyers get wrong, grounded in peptide-stability science.
What to ask before you buy any peptide
A practical, honest framework for vetting any peptide before you buy: what the evidence shows, who the prescriber is, whether there is a real certificate of analysis, whether it was made sterile, and where it came from, plus what buyers wish they had asked.