Guides
Reference guides, from a company that sells nothing
Most of what ranks for these questions is published by a peptide vendor, a compounding pharmacy, or a clinic with a booking link. Peptra doesn't sell or source any compound, so there's nothing on the other side of these pages except the answer.
These are reference material, not medical or legal advice. None of them tell you what to take, how much, or where to get it. Talk to a qualified clinician about your own situation.
Technique
Preparation and injection
How to reconstitute a peptide
The arithmetic, U-100 vs. U-50 syringes, the under-two-units problem, technique, and honest storage guidance. Nothing to sell.
Injection site rotation chart
A rotation chart built for weekly GLP-1 and peptide injections, not daily insulin — three zones, a six-week sequence, and what a site that needs rest looks like.
Regulatory
Status and the law
FDA-approved peptides list
32 compounds sorted into FDA-approved, 503A-compoundable, not-compoundable, and research-only, with review dates where they exist.
What 503A and 503B mean
The plain-language version of 503A, 503B, "research use only," and "not compoundable" — not the trade-publication version.
Research peptides and the law
The federal framework behind "research use only" labeling and how FDA enforcement has actually applied it. Not legal advice.
Reconstitution calculator
The free tool: vial strength and water in, syringe units out. Runs in your browser. Nothing is sent anywhere.
Peptra
The app behind these guides
Peptra logs doses, tracks what's left in the vial, and labels every compound with its regulatory status before you see anything else. No account, no server — it runs entirely on your device.