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Growth Hormone Secretagogues
Peptides that stimulate the pituitary gland to release growth hormone, either by mimicking GHRH (GHRH analogs) or by acting on ghrelin receptors (GHRPs).
9 peptides
Healing & Recovery
Peptides studied for tissue repair, wound healing, gut protection, and accelerated recovery from injury.
30 peptides
Sexual Health
Peptides that influence sexual arousal, libido, and reproductive function via central nervous system pathways.
7 peptides
Cognitive & Nootropic
Peptides investigated for memory enhancement, focus, neuroprotection, and cognitive performance.
18 peptidesAnti-Aging & Longevity
Peptides with potential telomere-protective, senolytic, or cellular rejuvenation properties.
27 peptides
Weight Loss & Metabolic
Peptides studied for fat oxidation, appetite regulation, insulin sensitivity, and body composition.
21 peptidesImmune Support
Peptides that modulate T-cell activity, cytokine production, and innate or adaptive immunity.
15 peptides
Skin & Hair
Peptides researched for collagen synthesis, wound healing, skin rejuvenation, and hair follicle health.
7 peptidesMuscle Growth
Peptides that promote myogenesis, satellite cell activation, anti-atrophy signaling, or myostatin inhibition.
15 peptidesSleep
Peptides studied for sleep quality improvement, circadian rhythm regulation, and stress-induced sleep disturbance.
3 peptidesPain & Inflammation
Peptides with anti-inflammatory, analgesic, or immune-modulating properties relevant to pain management.
17 peptidesMitochondrial
Peptides that target mitochondrial function, energy production, cardiolipin integrity, or mitochondrial-nuclear signaling.
6 peptidesAntimicrobial
Cationic peptides with broad-spectrum antibacterial, antifungal, and antiviral activity through membrane disruption.
6 peptidesNeuroprotective
Peptides studied for protection against neurodegeneration, excitotoxicity, and age-related cognitive decline.
21 peptidesReproductive & Fertility
Peptides that regulate the hypothalamic-pituitary-gonadal axis, gonadotropin secretion, and reproductive function.
0 peptidesCardiovascular
Peptides with direct cardiovascular effects including natriuretic peptides, vasodilators, and cardioprotective agents.
0 peptidesGastrointestinal
Peptides regulating GI motility, secretion, appetite, and gut-brain signaling.
0 peptidesBone & Mineral Metabolism
Peptides regulating bone formation, calcium homeostasis, and mineral metabolism.
0 peptidesAntiviral
Peptides that inhibit viral entry, replication, or immune evasion.
0 peptidesRelated Compounds
Non-peptide or next-generation compounds frequently discussed alongside peptides including GLP-1 agonists, dual/triple agonists, and metabolic agents.
3 peptidesSARMs & Androgen Modulators
Selective Androgen Receptor Modulators (SARMs) and related compounds. Included for educational comparison with peptide therapies.
3 peptidesFeatured Peptides
Browse all peptides →BPC-157
Healing & Recovery, Pain & Inflammation, Cognitive & Nootropic
BPC-157 is a synthetic 15-amino acid peptide derived from a naturally occurring protective protein isolated from human gastric juice. Origin...
TB-500
Healing & Recovery, Muscle Growth, Pain & Inflammation
TB-500 is a synthetic heptapeptide corresponding to the N-acetylated active fragment (amino acids 17–23) of the endogenous 43-amino acid sig...
Semaglutide
Weight Loss & Metabolic
Semaglutide is an FDA-approved synthetic 31-amino acid analog of glucagon-like peptide-1 (GLP-1), modified with a C18 fatty acid chain via a...
Epithalon
Anti-Aging & Longevity, Sleep
Epithalon (also spelled Epitalon) is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) that replicates the activity of Epithalamin, a natural polyp...
Thymosin Alpha-1
Immune Support, Anti-Aging & Longevity
Thymosin Alpha-1 (Tα1) is a 28-amino acid peptide naturally secreted by the thymus gland that plays a central role in T-cell maturation, dif...
GHK-Cu
Skin & Hair, Anti-Aging & Longevity, Healing & Recovery
GHK-Cu is a naturally occurring tripeptide copper complex (glycyl-L-histidyl-L-lysine) first identified in human plasma in the 1970s. It fun...
Semax
Cognitive & Nootropic, Neuroprotective
Semax is a synthetic heptapeptide derived from a fragment of adrenocorticotropic hormone (ACTH 4-7) with an added Pro-Gly-Pro stabilizing tr...
PT-141
Sexual Health
PT-141 (bremelanotide) is an FDA-approved peptide therapy developed from the melanocortin system, derived originally from Melanotan II. Duri...
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Amino acid sequences, mechanism of action pathways, clinical trial status, and links to primary literature on PubMed and PubChem.
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Stacking Guide
Synergistic peptide protocols.
Routes of Administration
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Peptides vs SARMs
Full mechanism & safety comparison.
About PeptideKnow
PeptideKnow is a free, independent reference database designed to organize and present research-backed information on bioactive peptides. Our database covers growth hormone secretagogues, healing peptides, nootropics, antimicrobial peptides, metabolic agents, and more.
Each entry includes mechanism of action data, synergistic compound cross-references, amino acid sequences, and links to primary research literature.
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