Peptide Lexicon

Research peptides explained: mechanism, reported effects, limitations and protocol data from the literature, with an evidence grade for every compound. For research reference only.

• Retatrutide – Triple-agonist: GIP/GLP-1/GCGR receptor agonist
• Tirzepatide – Dual GIP/GLP-1 receptor agonist
• BPC-157 – Synthetic pentadecapeptide from gastric juice
• GHK-Cu – Activates fibroblasts → collagen I/III/elastin synthesis
• TB-500 – Synthetic fragment of thymosin beta-4
• Melanotan-1 – Synthetic α-MSH analogue with MC1R selectivity
• Ipamorelin – Selective GHRH receptor agonist
• Semax – Upregulates BDNF
• MOTS-C – Peptide encoded in mitochondrial genome
• NAD+ – NAD+ precursors (NMN/NR) raise intracellular NAD+ levels
• Selank – Allosteric GABA-A modulation
• Epithalon – Synthetic tetrapeptide from the pineal gland
• Thymosin Alpha-1 – Endogenous peptide originally isolated from thymic tissue
• SS-31 – Tetrapeptide that concentrates in inner mitochondrial membrane, stabilizing cardiolipin
• KPV – C-terminal tripeptide fragment of α-MSH
• DSIP – Neuropeptide that modulates sleep architecture by promoting delta-wave (slow-wave) sleep
• 5-amino-1MQ – Small molecule that inhibits CD38, the primary NAD+-degrading enzyme in the body
• AHK-Cu – Tripeptide analogue of GHK-Cu with higher affinity for hair follicle receptors
• Cerebrolysin – Complex mixture of low-molecular-weight peptides derived from porcine brain tissue
• Pinealon – Synthetic tripeptide (Glu-Asp-Arg) derived from the pineal gland
• Snap-8 – Synthetic octapeptide that mimics N-terminal portion of SNAP-25