The open database for research peptides
Mechanisms, half-lives, research uses, and side-by-side comparisons — organised as a structured, scannable reference instead of a wall of text.
What is a peptide?
A peptide is a short chain of amino acids — longer than a single amino acid but shorter than a full protein. In the body, peptides act as precise signalling molecules: they bind receptors, trigger the release of hormones, and direct processes like tissue repair, metabolism, and immune regulation.
Research peptides are studied for those same signalling effects in controlled settings. PeptideDB organises what's known about each one — structure, mechanism, half-life, and the published literature — so you can compare compounds at a glance.
Browse by category
All categories →Recovery & Healing
Peptides studied for tissue repair, tendon, ligament, and wound healing.
20 peptidesGrowth Hormone
GHRH analogs and ghrelin mimetics that stimulate endogenous GH release.
17 peptidesWeight Loss
Compounds researched for adiposity, appetite, and fat reduction.
19 peptidesMetabolic
Peptides studied for glucose handling, insulin sensitivity, and energy metabolism.
17 peptidesLongevity
Mitochondrial-derived and NAD+-linked peptides studied for healthspan.
39 peptidesCognitive
Nootropic and neuroprotective peptides studied for memory and focus.
21 peptidesImmune
Thymic and immunomodulatory peptides studied for immune regulation.
15 peptidesSexual Health
Melanocortin and related peptides studied for libido and sexual function.
7 peptidesSkin & Cosmetic
Peptides studied for pigmentation, collagen, and skin appearance.
6 peptidesHormonal
Peptides that modulate hormone axes and endocrine signalling.
5 peptidesSleep
Peptides studied for sleep quality, recovery, and circadian regulation.
3 peptidesPerformance
Peptides studied for endurance, output, and physical performance.
2 peptidesAnabolic
Peptides studied for muscle growth and protein synthesis.
1 peptideCardiovascular
Peptides studied for cardiac and vascular protection.
1 peptideOther
Peptides that don’t fit a single primary category.
1 peptidePopular peptides
View all →BPC-157
PreclinicalPentadecapeptide studied for tissue repair
BPC-157 is a synthetic 15-amino-acid peptide derived from a protein found in gastric juice, studied extensively in animal models for accelerated healing of tendon, ligament, muscle, and gut tissue.
CJC-1295
In clinical trialsLong-acting GHRH analog
CJC-1295 is a synthetic analog of growth-hormone-releasing hormone (GHRH) engineered for a dramatically extended half-life, studied for its ability to raise growth hormone and IGF-1 levels.
Ipamorelin
In clinical trialsSelective ghrelin-mimetic GHRP
Ipamorelin is a selective growth hormone releasing peptide (GHRP) that stimulates GH release with minimal effect on cortisol, prolactin, or appetite, making it the cleanest of the classic GHRPs.
MOTS-c
PreclinicalMitochondrial-derived peptide studied for metabolism
MOTS-c is a mitochondrial-derived peptide encoded within mitochondrial DNA, studied in animal models for its role in metabolic regulation, insulin sensitivity, and exercise-like adaptations.
Semaglutide
FDA-approvedFDA-approved GLP-1 receptor agonist
Semaglutide is an FDA-approved GLP-1 receptor agonist for type 2 diabetes and chronic weight management, engineered with fatty-acid acylation for a once-weekly half-life.
TB-500
PreclinicalSynthetic Thymosin Beta-4 studied for repair & cell migration
TB-500 is a synthetic version of Thymosin Beta-4 (or its active fragment), a naturally occurring peptide studied for its role in actin regulation, cell migration, and tissue repair.
Popular comparisons
All comparisons →Recently reviewed
5-Amino-1MQ
PreclinicalNNMT Inhibitor | Longevity & Metabolic Enhancement
5-Amino-1MQ is a small molecule NNMT (nicotinamide N-methyltransferase) inhibitor that enhances cellular NAD+ levels and mitochondrial function.
Abaloparatide
Extensively studiedPTHrP Analog | Anabolic Bone-Building Agent
Abaloparatide is an FDA-approved anabolic bone-building agent and synthetic analog of parathyroid hormone-related protein (PTHrP).
ACE-031
Emerging researchMyostatin Inhibitor | Experimental Muscle Growth
ACE-031 is a soluble form of the activin type IIB receptor (ActRIIB) fused to an IgG1 Fc domain.
Adalank
Emerging researchN-Acetyl Selank Amidate | Enhanced Tuftsin Analog
Enhanced derivative of Selank with improved stability, blood-brain barrier penetration, and extended half-life compared to parent compound. Parent compound Selank approved in Russia since early 2000s.