What research peptides are — and what is actually known about them
One page per substance, always the same structure: what it is, what it acts on, what the research shows, its regulatory status and what remains unknown. No claims, no instructions for use, sources cited.
This page is informational and scientific in nature. It is not medical advice and not a set of instructions for use. Consult a physician for health questions.
What are peptides?
From amino acid to signalling molecule, and why a research peptide is not a medicine.
Quality & provenance
COA, HPLC and mass spectrometry: what those documents do and do not prove.
Research & science
Research phases, animal versus human studies, and how to read a publication.
Glossary
Agonist, half-life, lyophilisation, RUO — explained briefly and neutrally.
Substances on this site
BPC-157
A synthetic fifteen-amino-acid peptide studied mainly in laboratory and animal research, and not approved anywhere for use in humans.
Not approvedRetatrutide
An experimental peptide acting on three receptors at once, currently in clinical research and not registered as a medicine anywhere.
Prescription medicineSemaglutide
A GLP-1 receptor agonist registered as a medicine by the EMA and FDA and available in the Netherlands on prescription only.
Not approvedTB-500
A synthetic peptide related to the naturally occurring protein thymosin beta-4; studied in animal and laboratory research and not approved for humans.
Prescription medicineTirzepatide
A peptide acting on both the GLP-1 and the GIP receptor, registered as a prescription medicine under brand names including Mounjaro.