The peptide knowledge base
What these molecules are, how far the published research actually goes, and where the honest answer is still that nobody knows. Written so you can use it to judge us as easily as anyone else.
Fundamentals
Three pages that everything else on this site quietly assumes you have read.
What are peptides?
Amino acids in sequence, and where the naming convention draws its line against proteins and supplements.
Read QualityWhat is a certificate of analysis?
Reading a COA line by line, and knowing which figures on it can be verified independently.
Read FrameworkResearch use only
Four words with a legal meaning. What they permit, what they forbid and who carries the responsibility.
ReadMetabolic research
The busiest corner of the field, and the one with the widest gap between what is published and what gets claimed online.
Weight loss injections
A shorthand term covering several unrelated molecules. Which ones people usually mean by it.
Read FoundationThe GLP-1 pathway
The receptor route the rest of this section keeps referring back to. Start with this one.
Read CompoundSemaglutide
The single-receptor reference point, and why one molecule name can sit in two legal categories.
Read CompoundRetatrutide
Catalogued as LY3437943. Three receptors in one construct, and how far along the work really is.
Read ComparisonTirzepatide
GLP-1 and GIP in a single molecule, set against semaglutide using published figures only.
Read SafetyRetatrutide side effects
What the trial protocols recorded, at the frequencies the papers give, with nothing smoothed over.
ReadCompound files
One file per molecule, all built to the same four headings: where it came from, how it is built, what has been measured, and what is not being claimed.
At the bench
Handling, storage and the practical decisions that determine whether a series stays reproducible.
Using a peptide pen
Assembly, priming and storage in order. Dosing is deliberately left out.
Read 02Bacteriostatic water
Benzyl alcohol is the whole difference. What that changes for a multi-use vial.
Read 03Peptide calculator
Turns a vial size and a solvent volume into a concentration. Arithmetic only, no recommendations.
Open 04Comparing suppliers
A short list of things that can actually be verified, and a longer list of things that cannot.
ReadAbout this knowledge base
What these articles are for, and what they deliberately leave out.
Why does a shop publish this much material it does not sell?
Do these articles give dosing guidance?
How current is the research cited here?
Where should I start if all of this is new?
Can I ask a question that is not covered here?
Still not clear? Ask.
We will go as deep as you like on material, purity, batches and documentation. On use we say nothing, and we would rather be plain about that than vague.
For laboratory and research use only. Not for human or animal consumption. Not a medicine and not a food supplement. Sold to persons aged 18 and over.