Learning to read a COA — a Certificate of Analysis — is one of the most useful skills for anyone evaluating research peptides. A COA is the one-page lab report a manufacturer issues for a specific batch of material. It tells you what the vial is supposed to contain, how pure it is, how much…
What endotoxin means on a peptide COA: LPS basics, the LAL and rFC tests, what EU/mg means, endotoxin limits (K/M), and how to read it alongside HPLC purity and MS identity.
What is a peptide? A plain-language guide to peptide bonds, the peptide-vs-protein size convention, how peptides are named, and why molecular weight matters for handling.
Lyophilization (freeze-drying) turns a peptide solution into a stable dry powder. Here is how it works, why peptides need it, and how to handle the cake.
The milligram on a peptide vial is gross powder mass, not pure peptide. Net peptide content and salt form explain the gap and change your concentration.
An honest, well-sourced look at BPC-157 and TB-500 side effects — why human safety data is so limited, what is theoretical versus anecdotal, and why supply quality is the most concrete risk.
Why lyophilized peptide tolerates shipping, where the real degradation risks are, and a practical checklist for what to inspect when your vials arrive.
Glass vs plastic for storing peptide solutions: how surface adsorption causes losses, the material tradeoffs, and how to limit them.
Why some peptides are light-sensitive, how amber vials and dark storage protect them, and the photostability principles behind it.
TRT side effects explained from the evidence: erythrocytosis, fertility, cardiovascular signals from the 2023 TRAVERSE trial, prostate considerations, and monitoring.
