Glossary
In vitro
Done in a dish or test tube rather than in a living organism. Research peptides on this site are described for in vitro laboratory research only.
Relevant compounds
- BPC-157
15-amino-acid peptide studied in cytoprotection models
- TB-500
Synthetic fragment of thymosin beta-4
- GHK-Cu
Naturally occurring copper-binding tripeptide
- Epithalon
Synthetic tetrapeptide studied in cellular-ageing research
- Semax
Heptapeptide analogue of ACTH(4-10)
- Selank
Heptapeptide analogue of tuftsin
- Melanotan II
Non-selective cyclic melanocortin agonist
- CJC-1295
GHRH analogue
- Ipamorelin
Selective ghrelin-receptor agonist
- Thymosin alpha-1
28-amino-acid thymic peptide with late-stage human data
- LL-37
Human cathelicidin antimicrobial peptide
Further reading
- How to choose a research peptide supplier: a UK buyer's checklist
Ten checks to run before ordering research peptides: batch-matched CoAs, independent testing, transparent pricing, clear labelling and honest claims.
- Semaglutide vs tirzepatide vs retatrutide: the three incretin peptides compared
How the three best-known incretin research compounds differ in receptor targets, evidence and regulatory status, with links to each head-to-head comparison.
- How peptide evidence levels work: what a 1 to 5 rating means
The rubric behind peptide.wiki's evidence levels, how a compound moves up or down and why a high rating is about data quality, not suitability.
- Lyophilised vials vs pre-filled pens: comparing research peptide formats
How freeze-dried vials and pre-filled solution pens differ for laboratory research: stability, concentration labelling, price per mg and what to check on a CoA.