1. In-vitro evidence
Findings come from cells, tissues or biochemical systems studied outside a living organism. Such findings describe what a compound can do in a controlled system, not what it does in a person.
Research use only · Not for human or veterinary use
Known from N-terminusto C-terminus.
The two ends of a peptide chain, and the standard every profile here is held to: 55 compounds written up with mechanism, evidence by tier, UK regulatory status and every source cited. Written to be checked, not skimmed.
The catalogue
62 research materials
Vials and pre-filled pens. Prices are published rather than hidden behind an enquiry, and every product links to its full referenced profile.
How to read this site
Evidence is graded, not asserted
Every profile states the strongest tier of evidence that exists for that compound, and says plainly where the tier is low. A cell-culture result and a phase 3 trial are not the same thing, and the site never lets them look the same.
2. Animal evidence
Findings come from studies in living non-human animals. Species differences in physiology, metabolism and dosing mean animal results frequently do not carry over to humans.
3. Early human evidence
Findings come from small, early-phase or observational human studies. These are typically short, sparsely replicated, and designed to examine tolerability or signal rather than to establish effect.
4. Established clinical evidence
Findings come from adequately powered, replicated controlled trials in humans, generally supported by regulatory assessment or systematic review.
Reading
Start here
Terminology · Biochemistry
What is a peptide?
A peptide is a short chain of amino acids. That simple definition hides most of what actually matters — where the boundary with proteins sits, why sequence is not the whole story, and why two vials labelled with the same name are not necessarily the same substance.
6 minute read · reviewed 17 August 2026
Evidence · Study design
Research evidence versus clinical evidence
Most published findings about peptides come from cells and animals. Very few come from adequately powered human trials. The distance between those two positions is not a detail — it is the single most useful thing to hold in mind when reading about any compound.
7 minute read · reviewed 17 August 2026
Laboratory standards · Quality
What a certificate of analysis actually shows
A certificate of analysis records what specific tests found in a specific batch on a specific date. It is a useful document and a frequently misread one. Most of the questions people bring to a certificate are not questions it answers.
6 minute read · reviewed 17 August 2026
New profiles as they are written
Occasional email when a compound profile is published or a regulatory position changes. No promotional messages.