PEPTIDE
DUE DILIGENCE

Expanded peptide research library

Find the peptide you’re researching—and see what we actually know.

Each guide separates lab, animal and human research, explains the important limits, and links to original sources.

Start with: What are peptides? →
97 reviewed entriesPrimary-source linksUpdated September 2026

Why these peptides?

They appear often in research-supplier catalogs or published peptide literature and have enough source material to review responsibly. Being listed here is not a recommendation or popularity ranking.

Indexing pathways

Explore deeper peptide evidence pages

These grouped links help researchers and search engines move from the indexed directory into specific long-tail peptide profiles.

Metabolic and incretin research

Cagrilintide research profile Dulaglutide research profile Exenatide research profile Liraglutide research profile Mazdutide research profile Pramlintide research profile

Growth-hormone and tissue-repair research

AOD-9604 research profile GHRP-2 research profile GHRP-6 research profile Hexarelin research profile PEG-MGF research profile Follistatin-344 research profile

Neuroendocrine and signaling peptides

ARA-290 research profile B7-33 research profile Dalargin research profile DSIP research profile Elamipretide research profile Humanin research profile

Peptide hormones and fragments

Adrenomedullin research profile Angiotensin 1-7 research profile Apelin-13 research profile Buserelin research profile Calcitonin research profile Desmopressin research profile

Catalog terms researchers often search

Acetyl Hexapeptide-8 research profile Epitalon research profile GHK research profile Glutathione research profile Melanotan I research profile Melanotan II research profile

A-Z directory

All 97 peptide profiles

Approved product exists

Abaloparatide

PTHrP analog

A synthetic PTHrP analog with product-specific approval and research literature in bone-metabolism signaling.

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Early human research

ACE-031

Soluble activin receptor fusion protein

An investigational protein biologic designed to bind selected TGF-β-family ligands in muscle-biology research.

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Preclinical

Acetyl Hexapeptide-8

Synthetic cosmetic hexapeptide

A synthetic hexapeptide used in cosmetic-formulation research and laboratory models of neuromuscular signaling.

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Preclinical

Adipotide

Targeted pro-apoptotic peptidomimetic

A research peptidomimetic designed to target vascular markers associated with adipose tissue in experimental models.

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Clinical research

Adrenomedullin

Endogenous vasoregulatory peptide

An endogenous peptide hormone studied in vascular, inflammatory, and endothelial biology.

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Clinical research

Angiotensin (1-7)

Renin-angiotensin system heptapeptide

An endogenous heptapeptide studied as part of counter-regulatory renin-angiotensin system biology.

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Early human research

AOD-9604

Modified growth-hormone fragment

A modified fragment derived from the C-terminal region of human growth hormone, investigated primarily in metabolic and musculoskeletal research.

10 supplier listings trackedRead summary
Clinical research

Apelin-13

Endogenous APJ receptor ligand fragment

A short endogenous apelin fragment studied in APJ receptor and cardiometabolic physiology research.

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Clinical research

ARA-290

Erythropoietin-derived tissue-protective peptide

An erythropoietin-derived peptide engineered for tissue-protective signaling research without erythropoietic activity.

7 supplier listings trackedRead summary
Preclinical

B7-33

Relaxin-family receptor agonist peptide

A single-chain relaxin-derived peptide studied as a selective RXFP1 agonist in preclinical models.

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Preclinical

BPC-157

Synthetic pentadecapeptide

A synthetic 15-amino-acid peptide studied mainly in laboratory and animal models of tissue injury and gastrointestinal damage.

17 supplier listings trackedRead summary
Approved product exists

Bremelanotide

Cyclic melanocortin receptor agonist

A cyclic melanocortin-receptor agonist studied in receptor pharmacology and clinical development; an FDA-approved prescription product contains bremelanotide.

8 supplier listings trackedRead summary
Clinical research

Buserelin

GnRH receptor agonist

A synthetic GnRH analog studied in pituitary-gonadal axis research and used in some regulated product contexts outside the United States.

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Clinical research

Cagrilintide

Long-acting amylin analog

A long-acting acylated amylin analog under clinical investigation in metabolic research.

10 supplier listings trackedRead summary
Approved product exists

Calcitonin

Calcitonin receptor agonist peptide

A peptide hormone family with product-specific approvals and a long literature in calcium and bone biology.

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Preclinical

Cartalax

Short peptide bioregulator

A short peptide bioregulator label encountered in cartilage and connective-tissue research discussions.

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Approved product exists

Cetrorelix

GnRH receptor antagonist

A GnRH antagonist with product-specific approvals and substantial endocrine pharmacology literature.

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Preclinical

Chonluten

Short peptide bioregulator

A short peptide bioregulator label discussed in respiratory and tissue-specific laboratory research.

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Early human research

CJC-1295

Long-acting GHRH analog

A synthetic growth-hormone-releasing-hormone analog designed for extended activity and studied in endocrine pharmacology.

10 supplier listings trackedRead summary
Preclinical

Cortagen

Short peptide bioregulator

A short peptide bioregulator label encountered in neurobiology and aging-related research discussions.

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Early human research

Dalargin

Synthetic enkephalin analog

A synthetic enkephalin analog investigated in receptor, gastrointestinal, and ischemia-related research.

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Approved product exists

Degarelix

GnRH receptor antagonist

A synthetic GnRH antagonist with product-specific approval and extensive endocrine pharmacology research.

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Approved product exists

Desmopressin

Vasopressin analog

A synthetic vasopressin analog with product-specific approvals and a broad receptor-pharmacology literature.

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Preclinical

Dihexa

Angiotensin IV-derived peptidomimetic

An angiotensin IV-derived peptidomimetic investigated in preclinical neurobiology and HGF-related signaling models.

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Early human research

DSIP

Synthetic nonapeptide

A nonapeptide historically investigated in sleep, stress-response, and neuroendocrine experiments.

9 supplier listings trackedRead summary
Approved product exists

Dulaglutide

GLP-1 receptor agonist fusion protein

A long-acting GLP-1 receptor agonist fusion protein with product-specific FDA approval and extensive clinical study.

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Clinical research

Elamipretide

Mitochondria-targeting tetrapeptide

A mitochondria-targeting tetrapeptide studied in bioenergetics and clinical development programs.

12 supplier listings trackedRead summary
Early human research

Epitalon

Synthetic tetrapeptide

A synthetic tetrapeptide investigated in aging-related cellular and animal research.

13 supplier listings trackedRead summary
Approved product exists

Exenatide

GLP-1 receptor agonist

A 39-amino-acid GLP-1 receptor agonist with product-specific FDA approvals and a substantial pharmacology literature.

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Preclinical

FGL Peptide

NCAM-derived synthetic peptide

An NCAM-derived peptide studied in neural-cell adhesion and neurobiology models.

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Preclinical

Follistatin-344

Activin-binding glycoprotein isoform

A follistatin precursor isoform discussed in activin and myostatin-pathway research.

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Preclinical

FOXO4-DRI

D-retro-inverso cell-penetrating peptide

A D-retro-inverso peptide designed for preclinical studies of FOXO4-p53 interaction and senescence models.

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Preclinical

GHK

Endogenous tripeptide

An endogenous tripeptide studied in copper-binding, extracellular-matrix, and skin-cell research.

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Preclinical

GHK-Cu

Copper-binding tripeptide complex

A copper complex of the tripeptide GHK, investigated in extracellular-matrix, wound-response, and gene-expression models.

21 supplier listings trackedRead summary
Early human research

GHRP-2

Growth-hormone secretagogue receptor agonist

A synthetic hexapeptide studied in ghrelin-receptor pharmacology and endocrine-response experiments.

2 supplier listings trackedRead summary
Early human research

GHRP-6

Growth-hormone secretagogue receptor agonist

A synthetic hexapeptide investigated in growth-hormone secretagogue and ghrelin-receptor research.

2 supplier listings trackedRead summary
Clinical research

Glepaglutide

Long-acting GLP-2 receptor agonist

A long-acting GLP-2 analog studied in clinical intestinal-failure and adaptation research.

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Clinical research

GLP-1

Endogenous incretin peptide

An endogenous incretin hormone family studied extensively in metabolic and receptor biology.

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Clinical research

GLP-2

Endogenous intestinotrophic peptide

An endogenous proglucagon-derived peptide studied in intestinal growth, barrier, and adaptation research.

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Approved product exists

Glucagon

Pancreatic peptide hormone

A pancreatic peptide hormone with product-specific approvals and extensive metabolic physiology research.

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Clinical research

Glutathione

Endogenous tripeptide thiol

An endogenous tripeptide central to cellular redox chemistry and widely studied across laboratory systems.

6 supplier listings trackedRead summary
Approved product exists

Gonadorelin

Gonadotropin-releasing hormone decapeptide

A synthetic form of gonadotropin-releasing hormone used to study pituitary gonadotropin release and reproductive endocrine signaling.

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Approved product exists

Goserelin

GnRH receptor agonist depot peptide

A synthetic GnRH agonist with product-specific approvals and extensive endocrine research literature.

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Early human research

Hexarelin

Growth-hormone secretagogue receptor agonist

A synthetic hexapeptide growth-hormone secretagogue studied in endocrine and cardiovascular research.

1 supplier listing trackedRead summary
Preclinical

Humanin

Mitochondrial-derived peptide

A mitochondrial-derived peptide investigated in cell-survival, metabolic, and aging-related models.

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Preclinical

IGF-1 DES

Truncated IGF-1 analog

A truncated IGF-1 analog used to study receptor activity and reduced binding-protein interaction.

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Preclinical

IGF-1 LR3

Extended IGF-1 analog

An extended IGF-1 analog engineered for altered binding-protein interactions and widely used in laboratory research.

7 supplier listings trackedRead summary
Approved product exists

Insulin

Peptide hormone

A peptide hormone family with numerous product-specific approvals and a vast receptor and metabolic research literature.

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Early human research

Ipamorelin

Growth-hormone secretagogue receptor agonist

A pentapeptide growth-hormone secretagogue investigated for receptor selectivity, endocrine responses, and gastrointestinal motility models.

15 supplier listings trackedRead summary
Clinical research

Kisspeptin

KISS1-derived neuropeptide

A family of KISS1-derived peptides studied as upstream regulators of GnRH release and reproductive endocrine physiology.

12 supplier listings trackedRead summary
Preclinical

KPV

Melanocortin-derived tripeptide

A three-amino-acid fragment derived from α-melanocyte-stimulating hormone and investigated in inflammatory and epithelial-transport models.

14 supplier listings trackedRead summary
Approved product exists

Lanreotide

Somatostatin receptor agonist

A cyclic somatostatin analog with product-specific approvals and extensive receptor-pharmacology research.

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Approved product exists

Leuprolide

GnRH receptor agonist

A synthetic GnRH agonist with product-specific approvals across multiple finished-drug formulations.

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Approved product exists

Linaclotide

Guanylate cyclase-C agonist peptide

A disulfide-rich peptide GC-C agonist with product-specific approval and gastrointestinal pharmacology research.

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Approved product exists

Liraglutide

Acylated GLP-1 receptor agonist

A long-acting GLP-1 analog with product-specific FDA approvals and extensive clinical study.

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Preclinical

Livagen

Short peptide bioregulator

A short peptide bioregulator label discussed in liver-cell and gene-expression research contexts.

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Approved product exists

Lixisenatide

GLP-1 receptor agonist

An exendin-derived GLP-1 receptor agonist with product-specific approval and clinical metabolic literature.

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Preclinical

LL-37

Human antimicrobial host-defense peptide

A human cathelicidin-derived peptide studied in innate immunity, microbial interactions, inflammation, and tissue-response models.

6 supplier listings trackedRead summary
Clinical research

Mazdutide

Dual GLP-1/glucagon receptor agonist

An investigational dual GLP-1 and glucagon receptor agonist in clinical metabolic research.

2 supplier listings trackedRead summary
Approved product exists

Melanotan I

Melanocortin receptor agonist

A synthetic α-MSH analog related to afamelanotide and studied in melanocortin and pigmentation biology.

7 supplier listings trackedRead summary
Early human research

Melanotan II

Cyclic melanocortin receptor agonist

A cyclic melanocortin analog investigated in receptor, pigmentation, and neurobehavioral research.

10 supplier listings trackedRead summary
Early human research

MOTS-c

Mitochondrial-derived peptide

A mitochondrial-derived peptide investigated in cellular metabolism, stress responses, age-related biology, and exercise physiology.

20 supplier listings trackedRead summary
Preclinical

Nesfatin-1

NUCB2-derived endogenous peptide

An endogenous NUCB2-derived peptide investigated in appetite, energy-balance, and neuroendocrine models.

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Clinical research

Neuropeptide Y

Endogenous neuropeptide

An endogenous neuropeptide studied across appetite, autonomic, cardiovascular, and stress-response biology.

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Approved product exists

Octreotide

Somatostatin receptor agonist

A cyclic somatostatin analog with product-specific approvals and a long clinical and pharmacology literature.

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Approved product exists

Oxytocin

Endogenous cyclic nonapeptide hormone

An endogenous peptide hormone studied extensively in receptor, reproductive, and neurobehavioral biology.

5 supplier listings trackedRead summary
Preclinical

P21 Peptide

CNTF-derived neurotrophic peptide

A CNTF-derived peptide investigated in preclinical neurobiology and neurotrophic-signaling models.

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Approved product exists

Pasireotide

Somatostatin receptor agonist

A somatostatin analog with product-specific approval and receptor-subtype pharmacology research.

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Preclinical

PEG-MGF

PEGylated IGF-1 splice-variant fragment

A commercial research label for a PEGylated peptide associated with mechano-growth-factor literature.

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Clinical research

Pemvidutide

Dual GLP-1/glucagon receptor agonist

An investigational dual GLP-1 and glucagon receptor agonist in clinical metabolic and liver-disease research.

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Preclinical

Pinealon

Short peptide bioregulator

A short peptide bioregulator label encountered in neurobiology and cellular-stress research discussions.

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Approved product exists

Plecanatide

Guanylate cyclase-C agonist peptide

A uroguanylin analog with product-specific approval and gastrointestinal receptor-pharmacology literature.

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Preclinical

PNC-27

p53-derived membrane-active peptide

A p53-derived research peptide investigated in cancer-cell and membrane-interaction models.

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Approved product exists

Pramlintide

Amylin analog

A synthetic amylin analog with a product-specific FDA approval and clinical metabolic literature.

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Preclinical

PTD-DBM

Cell-penetrating peptide inhibitor

A cell-penetrating peptide used in preclinical studies of Dishevelled binding and Wnt/beta-catenin signaling.

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Clinical research

Retatrutide

Triple GIP/GLP-1/glucagon receptor agonist

An investigational peptide agonist designed to activate GIP, GLP-1, and glucagon receptors and currently studied in clinical metabolic-disease programs.

20 supplier listings trackedRead summary
Early human research

Selank

Synthetic tuftsin-derived heptapeptide

A synthetic heptapeptide derived from a tuftsin-related sequence and investigated in neurobehavioral and immune-signaling research.

9 supplier listings trackedRead summary
Approved product exists

Semaglutide

Acylated GLP-1 receptor agonist

A modified GLP-1 receptor agonist studied extensively in clinical programs with several product-specific FDA approvals.

5 supplier listings trackedRead summary
Early human research

Semax

Synthetic ACTH-fragment analog

A synthetic peptide based on an ACTH fragment, investigated in neurobiological, ischemia, and gene-expression research.

9 supplier listings trackedRead summary
Approved product exists

Sermorelin

GHRH fragment analog

A 29-amino-acid GHRH-related peptide used in research on pituitary responsiveness and growth-hormone physiology.

7 supplier listings trackedRead summary
Preclinical

SNAP-8

Synthetic cosmetic octapeptide

A synthetic octapeptide used in cosmetic-formulation and SNARE-related laboratory research.

6 supplier listings trackedRead summary
Clinical research

Substance P

Tachykinin neuropeptide

An endogenous tachykinin peptide studied in NK1 receptor signaling, neuroinflammation, and sensory-pathway biology.

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Preclinical

TB-500

Commercial thymosin-beta-4-related material

A commercial label used for thymosin-beta-4-related materials whose exact molecular identity can vary.

14 supplier listings trackedRead summary
Approved product exists

Teduglutide

GLP-2 receptor agonist

A GLP-2 analog with product-specific approval and clinical research in intestinal adaptation.

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Approved product exists

Terlipressin

Vasopressin analog prodrug

A vasopressin analog prodrug with product-specific approval and research literature in vascular physiology.

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Approved product exists

Tesamorelin

Stabilized GHRH analog

A stabilized GHRH analog studied in endocrine and body-composition research; FDA-approved prescription products contain tesamorelin.

16 supplier listings trackedRead summary
Early human research

Thymalin

Thymic peptide extract/bioregulator

A thymic peptide bioregulator label with regionally concentrated literature and variable material definitions.

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Early human research

Thymogen

Synthetic dipeptide bioregulator

A synthetic dipeptide bioregulator discussed in immune-cell and thymic-peptide research contexts.

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Clinical research

Thymosin alpha-1

Thymic peptide fragment

A 28-amino-acid thymic peptide studied in immune regulation, T-cell biology, infection, and oncology research.

6 supplier listings trackedRead summary
Clinical research

Thymosin beta-4

Actin-binding endogenous peptide

An endogenous 43-amino-acid actin-binding peptide investigated in cell migration, wound response, inflammation, and tissue-repair models.

2 supplier listings trackedRead summary
Approved product exists

Tirzepatide

Dual GIP/GLP-1 receptor agonist

A modified dual GIP/GLP-1 receptor agonist with product-specific FDA approvals and extensive clinical development.

14 supplier listings trackedRead summary
Approved product exists

Triptorelin

GnRH receptor agonist

A synthetic GnRH agonist with product-specific approvals and established endocrine pharmacology research.

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Preclinical

Tuftsin

Endogenous immunomodulatory tetrapeptide

An endogenous tetrapeptide fragment investigated in phagocyte and immune-signaling research.

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Early human research

Urocortin 2

Corticotropin-releasing factor family peptide

A CRF-family peptide studied in receptor biology, cardiovascular physiology, and stress-axis research.

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Approved product exists

Vasopressin

Endogenous cyclic nonapeptide hormone

An endogenous peptide hormone with product-specific approvals and extensive receptor and physiology literature.

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Preclinical

Vesugen

Short peptide bioregulator

A short peptide bioregulator label discussed in vascular-cell and tissue-specific research contexts.

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Clinical research

VIP

Endogenous neuropeptide

An endogenous 28-amino-acid neuropeptide studied across receptor, pulmonary, gastrointestinal, and neuroimmune biology.

7 supplier listings trackedRead summary

Combined formulations

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