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Research peptide library

Profiles of 16 research compounds grouped by the laboratory work they are studied in. Each profile covers structure, molecular weight, evidence by study type, US, UK and EU legal status, lab handling and supplier checks. No doses, ever.

Tissue repair models

Peptides studied in cell and animal models of tendon, gut, muscle and wound repair.

Illustration of a BPC-157 research peptide vial

BPC-157Body Protection Compound-157, a pentadecapeptideMW 1419.53 g/mol · 15 amino acids

Illustration of a TB-500 research peptide vial

TB-500Synthetic fragment of thymosin β4MW ≈889 g/mol · 7 amino acids (fragment)

Skin and cosmetic science

Cosmetic peptides used in topical skincare and studied in skin cell research. Legal as cosmetic ingredients.

Illustration of a GHK-Cu research peptide vial

GHK-CuCopper tripeptide-1 (glycyl-histidyl-lysine copper complex)MW 401.9 g/mol · 3 amino acids + Cu²⁺

Illustration of a Matrixyl research peptide vial

MatrixylPalmitoyl pentapeptide-4 (Pal-KTTKS)MW 802.05 g/mol · 5 amino acids + palmitoyl tail

Illustration of a Argireline research peptide vial

ArgirelineAcetyl hexapeptide-8 (also listed as acetyl hexapeptide-3)MW 888.99 g/mol · 6 amino acids

Cell ageing and metabolism

Compounds studied in mitochondrial function, telomeres and cellular energy.

MOTS-cMitochondrial open reading frame of the 12S rRNA type-cMW 2174.64 g/mol · 16 amino acids

EpitalonEpithalon, Ala-Glu-Asp-GlyMW 390.35 g/mol · 4 amino acids

NAD+Nicotinamide adenine dinucleotide (a coenzyme, not a peptide)MW 663.43 g/mol · Dinucleotide

Incretin and metabolic research

GLP-1 based compounds. Two are approved prescription medicines; research-grade powder is a different product. Every supplier carries a Caution label.

Illustration of a Semaglutide research peptide vial

SemaglutideLong-acting GLP-1 receptor agonist (active ingredient of Ozempic, Wegovy and Rybelsus)MW 4113.58 g/mol · 31 amino acids, lipidated

Illustration of a Tirzepatide research peptide vial

TirzepatideDual GIP and GLP-1 receptor agonist (active ingredient of Mounjaro and Zepbound)MW 4813.45 g/mol · 39 amino acids, lipidated

Illustration of a Retatrutide research peptide vial

RetatrutideInvestigational triple agonist of GIP, GLP-1 and glucagon receptors (LY3437943)MW ≈4731 g/mol · 39 amino acids, lipidated

Neuroscience

Peptides studied in rodent models of anxiety, neuroprotection and sleep.

Illustration of a Selank research peptide vial

SelankSynthetic analogue of tuftsin (Thr-Lys-Pro-Arg-Pro-Gly-Pro)MW 751.88 g/mol · 7 amino acids

Illustration of a Semax research peptide vial

SemaxACTH(4-10) analogue (Met-Glu-His-Phe-Pro-Gly-Pro)MW 813.93 g/mol · 7 amino acids

Illustration of a DSIP research peptide vial

DSIPDelta sleep-inducing peptideMW 848.81 g/mol · 9 amino acids

Immunology and inflammation

Peptides studied in T-cell maturation and inflammation models.

Illustration of a Thymosin α1 research peptide vial

Thymosin α1Thymalfasin, an N-acetylated 28-residue peptideMW 3108.28 g/mol · 28 amino acids

Illustration of a KPV research peptide vial

KPVLys-Pro-Val, the C-terminal tripeptide of α-MSHMW 342.43 g/mol · 3 amino acids

Research use only. Compounds listed here are not approved for human or veterinary use, except the licensed medicines named on the semaglutide and tirzepatide pages. We do not provide dosing or treatment information.