Peptides
Peptide Science: research & education.
In-depth guides on the mechanisms, evidence base, and scientific context behind the most studied research peptides. Each compound guide is graded using our evidence grading system and backed by peer-reviewed sources.
Featured profiles
Peptide Science: research & education.
In-depth guides on the mechanisms, evidence base, and scientific context behind the most studied research peptides. Each compound guide is graded using our evidence grading system and backed by peer-reviewed sources.
Mitochondrial · Metabolic
MOTS-c
Mitochondrial-derived peptide studied for its role in metabolic homeostasis, insulin sensitivity, and the cellular stress response.
Longevity · Research
Epithalon
Tetrapeptide studied for telomerase expression, pineal regulation, and cellular senescence modulation in ageing research.
Growth Hormone · Research
Ipamorelin
Selective pentapeptide agonist of the growth hormone secretagogue receptor (GHSR-1a) studied for targeted GH release with minimal effect on cortisol, ACTH and prolactin.
Peptide Protocols
BPC-157 + TB-500
Combined tissue-repair peptides with complementary mechanisms — the synergy hypothesis examined critically against the available preclinical record.
Tissue Repair
TB-500 (Thymosin Beta-4 fragment)
Synthetic fragment of Thymosin Beta-4, a 43-amino-acid peptide investigated for its role in actin regulation, cell migration, and wound healing.
Tissue Repair
BPC-157
Synthetic pentadecapeptide derived from a gastric juice protein, studied across hundreds of preclinical reports for tissue regeneration and cytoprotection.
What "research peptides" actually refers to
“Research peptide” is a regulatory phrase, not a scientific one. It typically refers to a short chain of amino acids — usually fewer than fifty — that has been synthesized for study in laboratory settings. The phrase is most commonly used by suppliers in jurisdictions where the compound has not been approved for human consumption, and the labelling “for research use only” is a way to navigate the regulatory grey zone.
The phrase tells you nothing about efficacy, safety, or regulatory status. It tells you only that the compound is being sold with an explicit non-clinical use statement on its label.
How we approach peptide coverage
When we publish a peptide guide, we are answering three questions:
What does the literature say?
— A direct summary of the published mechanism and study outcomes, drawn from primary papers.
How strong is that evidence?
— An evidence badge that signals whether human data exists, and at what stage.
Where does the evidence stop?
— An honest description of the limitations, conflicts, and unanswered questions.
We do not score compounds, rank them by “best,” or recommend them for any use. We describe what is published.
The regulatory landscape
Most peptides discussed on this site are not approved for human consumption outside specific indications. FDA, EMA, and MHRA have flagged several as bulk drug substances with safety or characterisation concerns. Where a peptide has approved indications, we note them clearly.
Off-label human use of any compound is a clinical decision made between a patient and a licensed prescriber. We do not encourage or endorse that use.