# Peptpedia — Research Peptide Encyclopedia

> Peptpedia is a comprehensive, citation-backed research peptide encyclopedia covering 42+ compounds with mechanisms of action, pharmacokinetics, peer-reviewed studies, and head-to-head comparisons — for educational and research purposes only.

## Core Pages
- [Browse All Peptides](https://peptpedia.org/browse): Full searchable directory of 42+ research peptides with filtering by category
- [Peptide Comparisons](https://peptpedia.org/compare): Head-to-head comparison articles for peptide pairs
- [Research Articles](https://peptpedia.org/research): In-depth mechanism and pharmacology research articles
- [Peptide Categories](https://peptpedia.org/categories): Peptides organized by research application
- [Peptide Classes](https://peptpedia.org/peptide-classes): Pharmacological class guides (GLP-1, GH secretagogues, etc.)
- [Medical Review Board](https://peptpedia.org/medical-board): Credentialed expert reviewers
- [Editorial Policy](https://peptpedia.org/editorial-policy): Content standards and review process
- [Research Methodology](https://peptpedia.org/methodology): How data is sourced, cited, and rated
- [Peptide Legality & Regulatory Status](https://peptpedia.org/peptide-legality): FDA approval, 503A compounding, research-chemical gray market, and WADA status explained
- [How to Evaluate Research Peptide Suppliers](https://peptpedia.org/peptide-sourcing): Reading COAs, HPLC purity vs net peptide content, third-party testing, and quality red flags
- [Peptide Reconstitution, Storage & Stability](https://peptpedia.org/peptide-reconstitution): Research handling guide — solvents, technique, -20°C vs 4°C storage, freeze-thaw damage, and concentration math
- [Peptide Reconstitution Calculator](https://peptpedia.org/peptide-reconstitution-calculator): Interactive concentration tool plus crawlable mixing charts: vial mass + BAC water gives mcg/mL, U-100 syringe units, doses per vial; reverse mode solves diluent volume; shareable links (?vial=&water=&dose=)
- [Research Peptide Safety](https://peptpedia.org/peptide-safety): What the evidence actually shows — six evidence tiers, class-level safety patterns, and how to read adverse-event data
- [Contact](https://peptpedia.org/contact): Contact form for corrections, suggestions, and inquiries

## Machine-Readable Formats
- [Full content index](https://peptpedia.org/llms-full.txt): All profiles, comparisons, and research summaries in one file
- Per-page markdown: append .md to any peptide, comparison, or research URL (e.g. https://peptpedia.org/peptide/bpc-157.md)

## Peptide Class Guides
- [GLP-1 Receptor Agonists & Incretin Mimetics](https://peptpedia.org/peptide-class/glp-1): Complete research guide to GLP-1 receptor agonist peptides including Semaglutide, Liraglutide, Tirzepatide, Retatrutide, Orforglipron, Survodutide, C…
- [Growth Hormone Secretagogues (GHRP & GHRH)](https://peptpedia.org/peptide-class/ghrp-secretagogues): Comprehensive research guide to growth hormone secretagogue peptides including GHRP-2, GHRP-6, Hexarelin, Ipamorelin, CJC-1295, and Sermorelin. Mecha…
- [BPC Family & Tissue Repair Peptides](https://peptpedia.org/peptide-class/bpc-family): Research guide to BPC-family and tissue repair peptides including BPC-157, TB-500 (Thymosin Beta-4), GHK-Cu, LL-37, KPV, and TB-4 Fragment. Mechanism…
- [Thymosin Family & Immune-Modulating Peptides](https://peptpedia.org/peptide-class/thymosin-family): Research guide to thymosin-family immune-modulating peptides including Thymosin Alpha-1, Thymulin, LL-37, KPV, and BPC-157. T-cell modulation, antimi…
- [Melanocortin Receptor Peptides (MC1R–MC5R)](https://peptpedia.org/peptide-class/melanocortin): Comprehensive research guide to melanocortin receptor peptides including PT-141 (Bremelanotide), Melanotan II, KPV, and alpha-MSH analogs. MC1R–MC5R…
- [TRH Analogs & Neuroendocrine Regulatory Peptides](https://peptpedia.org/peptide-class/trh-analogs): Research guide to TRH analogs and neuroendocrine peptides including Kisspeptin, Oxytocin, DSIP (delta sleep-inducing peptide), and Semax. Hypothalami…
- [Nootropic & Neurotropic Peptides](https://peptpedia.org/peptide-class/nootropic-peptides): Research guide to nootropic and neurotropic peptides including Semax, Selank, Dihexa, Cerebrolysin, and Oxytocin. BDNF signaling, GABA modulation, sy…
- [Mitochondrial & Longevity-Targeted Peptides](https://peptpedia.org/peptide-class/mitochondrial-peptides): Research guide to mitochondrial and longevity-targeted peptides including MOTS-c, SS-31 (elamipretide), Epithalon, and FOXO4-DRI. AMPK activation, ca…
- [Gut Health & Mucosal Repair Peptides](https://peptpedia.org/peptide-class/gut-health-peptides): Research guide to gastrointestinal and mucosal repair peptides including BPC-157, KPV, Teduglutide (GLP-2), and LL-37. Gastric stability, IBD models,…

## Peptide Profiles
- [BPC-157](https://peptpedia.org/peptide/bpc-157): BPC-157 is a synthetic pentadecapeptide derived from a protective protein found in gastric juice. It has been extensively studied for its potential r…
- [TB-500](https://peptpedia.org/peptide/tb-500): TB-500 is the N-terminally acetylated 17-23 fragment of thymosin beta-4 (Ac-LKKTETQ, CAS 885340-08-9), identified analytically in TB-500 product by H…
- [Ipamorelin](https://peptpedia.org/peptide/ipamorelin): Ipamorelin is a selective growth hormone secretagogue and ghrelin receptor agonist. It stimulates the release of growth hormone from the pituitary gl…
- [CJC-1295](https://peptpedia.org/peptide/cjc-1295): CJC-1295 is a synthetic analog of growth hormone releasing hormone (GHRH) with a Drug Affinity Complex that extends its half-life significantly compa…
- [Semax](https://peptpedia.org/peptide/semax): Semax is a synthetic peptide derived from adrenocorticotropic hormone (ACTH). It was developed in Russia as a nootropic and neuroprotective agent wit…
- [Selank](https://peptpedia.org/peptide/selank): Selank is a synthetic peptide analog of the endogenous tetrapeptide tuftsin. It was developed in Russia for its anxiolytic and nootropic properties a…
- [GHRP-6](https://peptpedia.org/peptide/ghrp-6): GHRP-6 is a synthetic hexapeptide that stimulates growth hormone release through the ghrelin receptor. It was one of the first growth hormone releasi…
- [GHRP-2](https://peptpedia.org/peptide/ghrp-2): GHRP-2 is a synthetic growth hormone secretagogue that stimulates GH release through the ghrelin receptor. It is considered one of the most potent GH…
- [Hexarelin](https://peptpedia.org/peptide/hexarelin): Hexarelin is a synthetic growth hormone secretagogue and one of the most potent GHRPs. It has been studied for cardioprotective effects in addition t…
- [Sermorelin](https://peptpedia.org/peptide/sermorelin): Sermorelin is a synthetic analog of growth hormone releasing hormone (GHRH) containing the first 29 amino acids, which represent the active portion o…
- [PT-141](https://peptpedia.org/peptide/pt-141): PT-141 (Bremelanotide) is a synthetic peptide that acts on melanocortin receptors. It was developed from the tanning peptide Melanotan II and has bee…
- [Melanotan II](https://peptpedia.org/peptide/melanotan-ii): Melanotan II is a synthetic analog of alpha-melanocyte stimulating hormone. It was developed for research into tanning, sexual function, and appetite…
- [GHK-Cu](https://peptpedia.org/peptide/ghk-cu): GHK-Cu is a naturally occurring copper complex of the tripeptide glycyl-L-histidyl-L-lysine. It has been extensively studied for wound healing, skin…
- [Epithalon](https://peptpedia.org/peptide/epithalon): Epithalon is a synthetic tetrapeptide based on the natural peptide Epithalamin produced by the pineal gland. It has been studied for effects on telom…
- [LL-37](https://peptpedia.org/peptide/ll-37): LL-37 is a human cathelicidin antimicrobial peptide that plays a crucial role in innate immunity. It has broad-spectrum antimicrobial activity and im…
- [Thymosin Alpha-1](https://peptpedia.org/peptide/thymosin-alpha-1): Thymosin Alpha-1 is a peptide originally isolated from thymic tissue that modulates immune function. It is approved in several countries for immune d…
- [DSIP](https://peptpedia.org/peptide/dsip): DSIP is a neuropeptide that was originally isolated from rabbit brain during slow-wave sleep. It has been studied for effects on sleep, stress respon…
- [AOD-9604](https://peptpedia.org/peptide/aod-9604): AOD-9604 is a modified fragment of human growth hormone (amino acids 176-191) that has been studied for its effects on fat metabolism without the gro…
- [Tesamorelin](https://peptpedia.org/peptide/tesamorelin): Tesamorelin is a synthetic growth hormone releasing hormone analog. It is FDA-approved for reducing excess abdominal fat in HIV-infected patients wit…
- [Dihexa](https://peptpedia.org/peptide/dihexa): Dihexa is a synthetic peptide derivative of angiotensin IV that has been studied for potent nootropic and neuroprotective effects. It is reported to…
- [SNAP-8](https://peptpedia.org/peptide/snap-8): SNAP-8 is a synthetic peptide designed to reduce wrinkles by modulating neuromuscular junction activity. It is an extension of the hexapeptide Argire…
- [FOXO4-DRI](https://peptpedia.org/peptide/foxo4-dri): FOXO4-DRI is a senolytic peptide designed to selectively induce apoptosis in senescent cells by disrupting the FOXO4-p53 interaction.
- [MOTS-c](https://peptpedia.org/peptide/mots-c): MOTS-c is a mitochondria-derived peptide that plays a role in metabolic homeostasis. It is encoded in the mitochondrial genome and affects insulin se…
- [Kisspeptin](https://peptpedia.org/peptide/kisspeptin): Kisspeptin is a neuropeptide that plays a central role in regulating the reproductive hormone axis. It is the endogenous ligand for the GPR54 recepto…
- [TB4-FRAG](https://peptpedia.org/peptide/tb4-frag): TB4-FRAG (Ac-SDKP) is a tetrapeptide fragment of Thymosin Beta-4. It has been studied for anti-fibrotic and cardioprotective effects.
- [Semaglutide (GLP-1)](https://peptpedia.org/peptide/semaglutide): Semaglutide is a long-acting GLP-1 (glucagon-like peptide-1) receptor agonist that mimics the incretin hormone GLP-1, regulating blood glucose levels…
- [Liraglutide (GLP-1)](https://peptpedia.org/peptide/liraglutide): Liraglutide is a GLP-1 receptor agonist with 97% amino acid sequence homology to native GLP-1, modified with a palmitic acid chain for extended durat…
- [Teduglutide (GLP-2)](https://peptpedia.org/peptide/teduglutide): Teduglutide is a GLP-2 (glucagon-like peptide-2) analog that promotes intestinal mucosal growth and function, FDA-approved for short bowel syndrome r…
- [Tirzepatide (GLP-1/GIP)](https://peptpedia.org/peptide/tirzepatide): Tirzepatide is a first-in-class dual GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 receptor agonist, providing synergistic metabolic e…
- [Retatrutide (Triple Agonist)](https://peptpedia.org/peptide/retatrutide): Retatrutide is a first-in-class triple hormone receptor agonist targeting GLP-1, GIP, and glucagon receptors simultaneously, producing the most profo…
- [KPV](https://peptpedia.org/peptide/kpv): KPV is a naturally-occurring tripeptide derived from the C-terminus of alpha-melanocyte stimulating hormone (α-MSH), demonstrating potent anti-inflam…
- [Orforglipron](https://peptpedia.org/peptide/orforglipron): Orforglipron is an oral, non-peptide GLP-1 receptor agonist developed by Eli Lilly and approved by the FDA in April 2026 as Foundayo for chronic weig…
- [Survodutide](https://peptpedia.org/peptide/survodutide): Survodutide is a dual glucagon and GLP-1 receptor agonist developed by Boehringer Ingelheim and Zealand Pharma, investigated for obesity, type 2 diab…
- [Cagrilintide](https://peptpedia.org/peptide/cagrilintide): Cagrilintide is a long-acting acylated amylin analog developed by Novo Nordisk, designed for once-weekly subcutaneous administration and studied both…
- [Mazdutide](https://peptpedia.org/peptide/mazdutide): Mazdutide is a dual GLP-1 and glucagon receptor agonist based on an oxyntomodulin analog, developed by Innovent Biologics in partnership with Eli Lil…
- [Cerebrolysin](https://peptpedia.org/peptide/cerebrolysin): Cerebrolysin is a neuropeptide preparation derived from purified porcine brain proteins, consisting of low-molecular-weight peptides and free amino a…
- [Follistatin 344](https://peptpedia.org/peptide/follistatin-344): Follistatin 344 is a naturally occurring glycoprotein that functions as a potent inhibitor of myostatin, activin, and other members of the TGF-beta s…
- [IGF-1 LR3](https://peptpedia.org/peptide/igf-1-lr3): IGF-1 LR3 is a modified form of insulin-like growth factor-1 with an arginine substitution at position 3 and a 13-amino acid N-terminal extension, de…
- [Thymulin](https://peptpedia.org/peptide/thymulin): Thymulin is a zinc-dependent nonapeptide hormone produced by thymic epithelial cells that plays a central role in T-cell differentiation, immune regu…
- [Oxytocin](https://peptpedia.org/peptide/oxytocin): Oxytocin is a cyclic nonapeptide neurohormone produced in the hypothalamus and released by the posterior pituitary, playing critical roles in social…
- [Pramlintide](https://peptpedia.org/peptide/pramlintide): Pramlintide is a synthetic analog of the pancreatic hormone amylin, originally FDA-approved in 2005 as adjunctive therapy to mealtime insulin for typ…
- [SS-31](https://peptpedia.org/peptide/ss-31): SS-31 (elamipretide) is a synthetic, cell-permeable tetrapeptide that targets the inner mitochondrial membrane and binds the phospholipid cardiolipin…
- [CagriSema](https://peptpedia.org/peptide/cagrisema): CagriSema is an investigational fixed-dose combination of cagrilintide, a long-acting amylin analog, and semaglutide, a GLP-1 receptor agonist, co-ad…
- [MK-677 (Ibutamoren)](https://peptpedia.org/peptide/mk-677): MK-677 (ibutamoren) is an orally active, non-peptide small molecule agonist of the ghrelin receptor (GHSR-1a) that stimulates endogenous growth hormo…
- [Mod GRF 1-29](https://peptpedia.org/peptide/mod-grf-1-29): Mod GRF 1-29 is a tetrasubstituted analog of GRF(1-29), the shortest fully active fragment of growth hormone-releasing hormone, engineered for enzyma…
- [Melanotan I (Afamelanotide)](https://peptpedia.org/peptide/melanotan-i): Melanotan I (afamelanotide) is a linear alpha-MSH analog with predominant melanocortin-1 receptor activity, FDA-approved in 2019 as Scenesse, a 16 mg…

## Peptide Comparisons
- [Semaglutide vs Tirzepatide: Comparative Analysis of GLP-1 Receptor Agonist Efficacy for Weight Loss and Glycemic Control](https://peptpedia.org/compare/semaglutide-vs-tirzepatide): Research indicates that Tirzepatide, a dual GIP/GLP-1 receptor agonist, demonstrates superior weight loss efficacy compared to Semaglutide, a GLP-1-o…
- [Retatrutide vs Tirzepatide: Triple Agonist vs Dual Agonist Comparison for Metabolic Research](https://peptpedia.org/compare/retatrutide-vs-tirzepatide): Retatrutide, a first-in-class triple hormone receptor agonist targeting GLP-1, GIP, and glucagon receptors, demonstrates unprecedented weight loss ef…
- [Retatrutide vs Semaglutide: Triple Agonist vs GLP-1 Agonist for Next-Generation Obesity Research](https://peptpedia.org/compare/retatrutide-vs-semaglutide): Retatrutide's triple receptor mechanism (GLP-1/GIP/Glucagon) achieves significantly greater weight loss than Semaglutide's single GLP-1 pathway—24.2%…
- [AOD-9604 vs Semaglutide: Non-Hormonal Fat Loss Peptide vs GLP-1 Agonist Comparison](https://peptpedia.org/compare/aod-9604-vs-semaglutide): AOD-9604, a modified fragment of human growth hormone (amino acids 176-191), and Semaglutide, a GLP-1 receptor agonist, represent fundamentally diffe…
- [BPC-157 vs TB-500: Which Is Better? Gut, Tendon & Muscle Data](https://peptpedia.org/compare/bpc-157-vs-tb-500): BPC-157 is the better-supported choice in animal data for gut, tendon and ligament, and oral-stability research; TB-500 (and its parent thymosin β-4)…
- [Semax vs Selank: Nootropic Peptide Comparison for Cognitive and Anxiolytic Research](https://peptpedia.org/compare/semax-vs-selank): Semax and Selank, both developed in Russia for clinical use, represent complementary approaches to cognitive and emotional regulation through peptide…
- [CJC-1295 vs Ipamorelin: Pulse vs Sustained GH Release](https://peptpedia.org/compare/cjc-1295-vs-ipamorelin): Ipamorelin starts the GH pulse at the ghrelin receptor (~2-hour half-life); in the rat and swine study that introduced it (PMID 9849822) it released…
- [Epithalon vs FOXO4-DRI: Telomerase Activation vs Senolytic Peptide Comparison for Longevity Research](https://peptpedia.org/compare/epithalon-vs-foxo4-dri): Epithalon and FOXO4-DRI represent two distinct approaches to cellular anti-aging research. Epithalon, a synthetic tetrapeptide based on pineal gland…
- [GHK-Cu vs BPC-157: Copper Peptide vs Gastric Peptide Comparison for Tissue Repair Research](https://peptpedia.org/compare/ghk-cu-vs-bpc-157): GHK-Cu and BPC-157 are two of the most researched peptides for tissue repair, with distinct but potentially complementary mechanisms. GHK-Cu, a natur…
- [GHRP-6 vs GHRP-2: Growth Hormone Secretagogue Peptide Comparison for Research](https://peptpedia.org/compare/ghrp-6-vs-ghrp-2): GHRP-6 and GHRP-2 are both hexapeptide growth hormone releasing peptides that stimulate GH release through the ghrelin receptor (GHS-R1a), but differ…
- [Sermorelin vs CJC-1295: GHRH Analog Comparison for Growth Hormone Research](https://peptpedia.org/compare/sermorelin-vs-cjc-1295): Sermorelin and CJC-1295 are both GHRH analogs that stimulate pituitary GH release through the GHRH receptor, but differ dramatically in pharmacokinet…
- [Hexarelin vs Ipamorelin: GHRP Potency vs Selectivity Comparison for Research](https://peptpedia.org/compare/hexarelin-vs-ipamorelin): Hexarelin and Ipamorelin represent opposite ends of the GHRP spectrum: maximum potency versus maximum selectivity. Hexarelin is the most potent GHRP…
- [BPC-157 vs KPV: Gastric Pentadecapeptide vs Anti-Inflammatory Tripeptide Comparison](https://peptpedia.org/compare/bpc-157-vs-kpv): BPC-157 and KPV represent different approaches to tissue healing and inflammation control, with overlapping applications in gastrointestinal research…
- [Liraglutide vs Semaglutide: GLP-1 Agonist Comparison for Weight Loss and Diabetes | Peptpedia](https://peptpedia.org/compare/liraglutide-vs-semaglutide): Semaglutide demonstrates superior weight loss efficacy compared to Liraglutide in both clinical trial data and head-to-head comparisons, with once-we…
- [Thymosin Alpha-1 vs LL-37: Immune-Modulating Peptide Comparison | Peptpedia](https://peptpedia.org/compare/thymosin-alpha-1-vs-ll-37): Thymosin Alpha-1 and LL-37 are two well-characterized immune-modulating peptides with complementary but distinct mechanisms. Thymosin Alpha-1 is a th…
- [Ipamorelin vs Sermorelin: GHRP vs GHRH, Selectivity](https://peptpedia.org/compare/ipamorelin-vs-sermorelin): Ipamorelin is a selective GHRP (ghrelin receptor) with a ~2-hour half-life; in rats and swine it produced a GH pulse without the ACTH and cortisol ri…
- [Epithalon vs Thymosin Alpha-1: Anti-Aging vs Immune Peptide Comparison | Peptpedia](https://peptpedia.org/compare/epithalon-vs-thymosin-alpha-1): Epithalon and Thymosin Alpha-1 represent distinct but complementary approaches to age-associated decline. Epithalon is a pineal tetrapeptide studied…
- [PT-141 vs Melanotan II: Melanocortin Peptide Comparison for Sexual Health Research | Peptpedia](https://peptpedia.org/compare/pt-141-vs-melanotan-ii): PT-141 (Bremelanotide) and Melanotan II are both cyclic heptapeptide analogs of alpha-MSH acting on melanocortin receptors, but with different select…
- [Tirzepatide vs CagriSema: Next-Generation Weight Loss Peptide Comparison | Peptpedia](https://peptpedia.org/compare/tirzepatide-vs-cagrisema): Tirzepatide and CagriSema (cagrilintide + semaglutide) represent two distinct multi-receptor approaches to obesity pharmacotherapy. Tirzepatide's SUR…
- [Semax vs Dihexa: Cognitive Enhancement Peptide Comparison | Peptpedia](https://peptpedia.org/compare/semax-vs-dihexa): Semax and Dihexa are two of the most potent cognitive-enhancing peptides in preclinical research, though through entirely different mechanisms. Semax…
- [GHK-Cu vs Epithalon: Anti-Aging Peptide Comparison | Peptpedia](https://peptpedia.org/compare/ghk-cu-vs-epithalon): GHK-Cu and Epithalon are two well-characterized anti-aging peptides targeting different biological mechanisms. GHK-Cu is a naturally occurring copper…
- [BPC-157 vs LL-37: Tissue Repair vs Antimicrobial Peptide Comparison | Peptpedia](https://peptpedia.org/compare/bpc-157-vs-ll-37): BPC-157 and LL-37 are both studied for wound healing but through distinct mechanisms: BPC-157 promotes tissue repair through angiogenesis, fibroblast…
- [BPC-157 vs Ipamorelin: Healing Peptide vs GH Secretagogue Comparison | Peptpedia](https://peptpedia.org/compare/bpc-157-vs-ipamorelin): BPC-157 and Ipamorelin target entirely different physiological systems: BPC-157 is a tissue repair peptide derived from gastric juice that promotes h…
- [Semax vs PT-141: ACTH Analog vs Melanocortin Peptide Comparison | Peptpedia](https://peptpedia.org/compare/semax-vs-pt-141): Semax and PT-141 share ACTH/alpha-MSH origin but represent pharmacologically distinct agents. Semax (Met-Glu-His-Phe-Pro-Gly-Pro) is an ACTH(4-7) ana…
- [Dihexa vs Cerebrolysin: Cognitive Enhancement Peptide Comparison for Neuroprotection Research](https://peptpedia.org/compare/dihexa-vs-cerebrolysin): Dihexa and Cerebrolysin both target cognitive enhancement and neuroprotection, but they occupy fundamentally different positions on the evidence spec…
- [FOXO4-DRI vs MOTS-c: Anti-Aging Peptide Comparison — Senolytic vs Mitochondrial Approaches](https://peptpedia.org/compare/foxo4-dri-vs-mots-c): FOXO4-DRI and MOTS-c represent two fundamentally different approaches to biological aging, targeting distinct hallmarks of the aging process. FOXO4-D…
- [CJC-1295 DAC vs No DAC: Same Peptide, Days vs Minutes](https://peptpedia.org/compare/cjc-1295-vs-mod-grf-1-29): CJC-1295 with DAC and Mod GRF 1-29 (sold as CJC-1295 no DAC) are the same tetrasubstituted GRF(1-29) core; the only difference is the DAC linker, whi…
- [Ipamorelin vs GHRP-2: Selectivity vs Potency in Ghrelin-Receptor GH Secretagogue Research](https://peptpedia.org/compare/ipamorelin-vs-ghrp-2): Ipamorelin and GHRP-2 (pralmorelin) are both growth hormone secretagogues acting through the ghrelin receptor (GHSR-1a), but they sit at opposite end…
- [TB-500 vs GHK-Cu: Cell Migration vs Gene Modulation in Regenerative Peptide Research](https://peptpedia.org/compare/tb-500-vs-ghk-cu): TB-500 and GHK-Cu are both studied for tissue repair, but they represent two different biological strategies. TB-500 is a synthetic fragment modeled…
- [Retatrutide vs CagriSema: Triple Agonist vs Amylin-GLP-1 Combination in Next-Generation Obesity Pharmacology](https://peptpedia.org/compare/retatrutide-vs-cagrisema): Retatrutide and CagriSema are the two leading candidates to succeed GLP-1 monotherapy in obesity pharmacology, built on opposing design philosophies.…
- [Ipamorelin vs Tesamorelin: Growth Hormone Secretagogue Comparison](https://peptpedia.org/compare/ipamorelin-vs-tesamorelin): Tesamorelin is an FDA-approved GHRH analog (Egrifta) with Phase 3 evidence: in a pooled analysis of two 26-week trials in 806 antiretroviral-treated…
- [AOD-9604 vs Tesamorelin: hGH Fragment versus GHRH Analog Comparison](https://peptpedia.org/compare/aod-9604-vs-tesamorelin): Tesamorelin is an FDA-approved GHRH analog with Phase 3 evidence that 2 mg daily reduced visceral adipose tissue 15.4% versus placebo at 26 weeks in…
- [MOTS-c vs SS-31: Mitochondrial Peptide Comparison](https://peptpedia.org/compare/mots-c-vs-ss-31): MOTS-c is a 16-amino-acid peptide encoded in mitochondrial 12S rRNA that, in mice, activates AMPK-linked metabolic programs and prevents diet-induced…
- [Oxytocin vs PT-141: Sexual Function and Neuropeptide Comparison](https://peptpedia.org/compare/oxytocin-vs-pt-141): PT-141 (bremelanotide, Vyleesi) is FDA-approved for acquired, generalized hypoactive sexual desire disorder in premenopausal women on the basis of tw…

## Research Articles
- [Wolverine Stack: A Scientific Analysis of BPC-157 and TB-500 Combination Research](https://peptpedia.org/research/wolverine-stack-bpc157-tb500-analysis): The Wolverine Stack refers to the combination of two peptides studied in preclinical research: BPC-157, a synthetic pentadecapeptide derived from hum…
- [GLOW Stack: A Scientific Analysis of GHK-Cu, BPC-157, and TB-500 Combination Research](https://peptpedia.org/research/glow-stack-bpc157-tb500-ghkcu-analysis): The GLOW Stack is a three-peptide research combination consisting of GHK-Cu (glycyl-L-histidyl-L-lysine copper complex), BPC-157 (Body Protection Com…
- [KLOW Stack: A Scientific Analysis of GHK-Cu, BPC-157, TB-500, and KPV Combination Research](https://peptpedia.org/research/klow-stack-ghkcu-bpc157-tb500-kpv-analysis): The KLOW Stack is a four-peptide combination containing GHK-Cu, BPC-157, TB-500, and KPV in a reported 5:1:1:1 ratio. It extends the three-peptide GL…
- [Mechanism of Action of Tirzepatide: A Technical Deep Dive into Dual GIP/GLP-1 Receptor Agonism](https://peptpedia.org/research/tirzepatide-mechanism): Tirzepatide is a first-in-class dual agonist that simultaneously activates both glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like…
- [Semaglutide and the Gut-Brain Axis: How GLP-1 Signaling Controls Appetite and Satiety](https://peptpedia.org/research/semaglutide-gut-brain-axis): Semaglutide controls appetite through dual gut-brain axis pathways: peripheral GLP-1 receptors on vagal afferent neurons transmit satiety signals to…
- [BPC-157 Stability: Storage, Reconstitution, and Degradation Factors in Research Applications](https://peptpedia.org/research/bpc-157-stability): Lyophilized BPC-157 is highly stable when stored at -20°C, maintaining integrity for years. Once reconstituted in bacteriostatic water (BAC water), B…
- [Ipamorelin and Growth Hormone Secretagogue Signaling: GHS-R1a Pathway Deep Dive](https://peptpedia.org/research/ipamorelin-ghs-pathway): Ipamorelin selectively activates the growth hormone secretagogue receptor type 1a (GHS-R1a) to stimulate pituitary growth hormone release without the…
- [MOTS-c: The Mitochondrial-Derived Peptide That Mimics Exercise](https://peptpedia.org/research/mots-c-mitochondrial): MOTS-c is a 16-amino acid peptide encoded within the mitochondrial genome's 12S rRNA gene, representing a novel class of 'mitokines'—signaling molecu…
- [How BPC-157 Triggers New Blood Vessels (VEGF)](https://peptpedia.org/research/bpc-157-angiogenesis): BPC-157 triggers new blood vessel formation mainly at the receptor end of the VEGF axis: in ischemic rat hind-limb muscle and human endothelial cells…
- [FOXO4-DRI: Senolytic Peptide Mechanism and the p53-FOXO4 Axis](https://peptpedia.org/research/foxo4-dri-senolytics): FOXO4-DRI is a D-retro-inverso peptide that selectively kills senescent cells by disrupting the protective FOXO4-p53 interaction. In senescent cells,…
- [How GHK-Cu Binds Copper and Changes Gene Expression](https://peptpedia.org/research/ghk-cu-biochemistry): GHK-Cu binds copper(II) in a stable 1:1 complex (glycyl-L-histidyl-L-lysine:copper) and thereby modulates expression of over 4,000 genes — about 32%…
- [Semax and BDNF: Neurotrophin Signaling and Cognitive Enhancement Mechanisms](https://peptpedia.org/research/semax-bdnf-pathway): Semax enhances cognitive function primarily through upregulation of BDNF (brain-derived neurotrophic factor) and activation of TrkB receptor signalin…
- [How TB-500 Moves Repair Cells: Actin and Migration](https://peptpedia.org/research/tb-500-thymosin-beta4-actin-polymerization): TB-500 moves repair cells toward injury by sequestering G-actin, maintaining the monomer pool that drives cell motility. One caution before the mecha…
- [Does Epithalon Activate Telomerase?](https://peptpedia.org/research/epithalon-telomerase-activation-telomere-biology): In published cell-culture work from Khavinson's group, Epithalon induced telomerase (hTERT) activity and measurable telomere elongation in human feta…
- [Retatrutide: Mechanistic Basis of Triple GLP-1/GIP/Glucagon Receptor Agonism and Metabolic Outcomes](https://peptpedia.org/research/retatrutide-triple-agonism-glp1-gip-glucagon): Retatrutide (LY3437943) is a once-weekly injectable peptide that simultaneously activates three metabolic hormone receptors: GLP-1R (glucagon-like pe…
- [Sermorelin Pharmacology: GHRH Receptor Binding, Pituitary Signaling, and Physiological Growth Hormone Restoration](https://peptpedia.org/research/sermorelin-ghrh-receptor-pharmacology): Sermorelin is a synthetic 29-amino acid peptide corresponding to the N-terminal fragment of human growth hormone-releasing hormone (GHRH 1-44). It bi…
- [Thymosin Alpha-1: Thymic Immunomodulatory Peptide and T-Cell–Mediated Immune Enhancement](https://peptpedia.org/research/thymosin-alpha1-t-cell-immunomodulation): Thymosin Alpha-1 (Tα1) is a 28-amino acid thymic peptide (derived by proteolytic cleavage of prothymosin alpha) that functions as a broad immunomodul…
- [How CJC-1295 DAC Extends Half-Life to 6–8 Days](https://peptpedia.org/research/cjc-1295-dac-albumin-binding-mechanism): CJC-1295 (GRF[1-29]-C8 with Drug Affinity Complex) extends the 7–10 minute plasma half-life of native GHRH 1-29 to 6–8 days by incorporating a maleim…
- [PT-141 (Bremelanotide) and Melanocortin Receptor Signaling: MC4R Activation, Sexual Motivation Pathways, and FDA Approval Evidence](https://peptpedia.org/research/pt-141-bremelanotide-melanocortin-mc4r-sexual-function): PT-141 (bremelanotide; Vyleesi®) is a cyclic heptapeptide melanocortin receptor agonist that activates MC1R, MC3R, and MC4R receptors in the central…
- [IGF-1 LR3: Long-R3 Modification, IGFBP Resistance, and Anabolic Signaling Cascade](https://peptpedia.org/research/igf-1-lr3-igfbp-resistance-anabolic-signaling): IGF-1 LR3 (Long-R3 Insulin-Like Growth Factor-1) is a synthetic 83-amino acid analog of human IGF-1 modified at two positions: an Arg substitution at…
- [LL-37 Cathelicidin: Innate Immunity, Amphipathic Helix Antimicrobial Mechanism, and Vitamin D-Regulated Immunomodulation](https://peptpedia.org/research/ll-37-cathelicidin-innate-immunity-antimicrobial-mechanism): LL-37 is the sole human member of the cathelicidin antimicrobial peptide (AMP) family, produced by proteolytic cleavage of the 18 kDa precursor hCAP1…
- [Kisspeptin and GPR54/KISS1R Signaling: Hypothalamic Control of the GnRH Pulse Generator and Reproductive Endocrine Axis](https://peptpedia.org/research/kisspeptin-gpr54-gnrh-reproductive-axis): Kisspeptin is a family of hypothalamic neuropeptides (kisspeptin-54, -14, -13, -10) encoded by the KISS1 gene and processed from a 145-amino acid pre…
- [Dihexa and the HGF/c-Met Synaptogenesis Pathway: Mechanism, Evidence, and Limitations](https://peptpedia.org/research/dihexa-hgf-cmet-synaptogenesis): Dihexa is a peptidomimetic that enhances cognitive function by allosterically potentiating hepatocyte growth factor (HGF) binding to the c-Met recept…
- [FOXO4-DRI Preclinical Evidence and Translational Challenges: From Mouse Models to Clinical Reality](https://peptpedia.org/research/foxo4-dri-preclinical-translation): FOXO4-DRI demonstrated selective senolytic activity in the landmark Baar et al. 2017 Cell study, with subsequent independent confirmations in human c…
- [FOXO4-DRI Research Dosing: Every Published Protocol (2026)](https://peptpedia.org/research/foxo4-dri-dosage-protocol): There is no human FOXO4-DRI dose, because the peptide has never been tested in people. The animal literature is unusually consistent, though: nearly…
- [FOXO4-DRI Human Trials: Status, Evidence Gaps, and What to Watch (2026)](https://peptpedia.org/research/foxo4-dri-human-trials): As of July 2026, no human trial of FOXO4-DRI has ever been registered or published. ClinicalTrials.gov, the registry where any legitimate trial must…
- [FOXO4-DRI Safety and Side Effects: What the Evidence Shows (2026)](https://peptpedia.org/research/foxo4-dri-safety): In the published mouse studies, FOXO4-DRI caused no reported side effects: treated animals kept their weight, blood counts, and organ markers while s…
- [Liraglutide Pharmacology: GLP-1 Receptor Binding, C16 Palmitate Albumin Anchoring, and the Pharmacokinetic Basis of Once-Daily Incretin Therapy](https://peptpedia.org/research/liraglutide-glp1-receptor-pharmacology): Liraglutide is a 31-amino acid GLP-1 analog sharing 97% sequence identity with human GLP-1, modified by a Lys³⁴Arg substitution and a C16 palmitoyl c…
- [Melanotan II Pharmacology: A Non-Selective Cyclic Melanocortin Agonist at MC1R, MC3R, and MC4R](https://peptpedia.org/research/melanotan-ii-melanocortin-receptor-pharmacology): Melanotan II is a synthetic lactam-bridged cyclic heptapeptide analog of α-MSH(4-10) that non-selectively activates melanocortin receptors. MC1R acti…
- [Tesamorelin Pharmacology: A Stabilized GHRH(1-44) Analog for Endogenous GH Axis Stimulation and Visceral Adipose Reduction](https://peptpedia.org/research/tesamorelin-ghrh-analog-pharmacology): Tesamorelin is a synthetic 44-amino acid analog of human growth hormone-releasing hormone, stabilized by a trans-3-hexenoyl group attached to Tyr¹ th…
- [Cerebrolysin Pharmacology: A Porcine Brain-Derived Peptide Mixture with Neurotrophic-Like Activity](https://peptpedia.org/research/cerebrolysin-neurotrophic-peptide-mixture-pharmacology): Cerebrolysin is an enzymatically prepared mixture of low-molecular-weight peptides and free amino acids derived from porcine brain, pharmacologically…

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