Peptide Science
Research and Education Hub
One Stop Peptide Science Reference
Peer-reviewed, citation-backed profiles on 162+ research peptides. Mechanisms of action, preclinical research summaries, dosing protocols from the literature, and educational resources, all referenced to primary sources.
All compounds documented here are research chemicals investigated in preclinical and clinical studies. This resource is strictly for scientific education and laboratory research purposes.
New to peptide science?
Start here
Four beginner-friendly guides that cover everything you need to know before diving into the research.
New to the terminology? See our glossaryWhat Are Research Peptides?
A complete introduction to peptide science — structure, mechanism, and why they're used in research.
Peptide Storage Guide
Temperature, light, and shelf-life requirements for lyophilized and reconstituted peptides.
Understanding Half-Life
How half-life affects dosing frequency and research protocol design.
Peptide Stacking Basics
How multiple peptides interact and how to design sound research protocols.
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Select the area most relevant to your research goals.
Best Peptides For...
Evidence-ranked guides comparing the top research peptides for each research goal
Browse Research Peptides by Therapeutic Area
Know Your Peptide covers 10 research categories with peer-reviewed profiles for each compound, including mechanisms of action, dosing data from the literature, and cited studies.
BPC-157, TB-500, and related peptides studied for tissue repair, tendon healing, and angiogenesis in preclinical models.
Ipamorelin, CJC-1295, Sermorelin, and GHRP variants that stimulate pituitary GH release via GHRH and ghrelin receptor pathways.
Semax, Selank, Dihexa, and nootropic peptides studied for BDNF modulation, neuroprotection, and cognitive function research.
Semaglutide, Tirzepatide, and GLP-1/GIP receptor agonists with extensive clinical data on metabolic and weight regulation pathways.
IGF-1 LR3, IGF-1 DES, and anabolic peptides studied for myogenic differentiation, satellite cell activation, and muscle hypertrophy.
GHK-Cu, Epitalon, and epithelial peptides with research on collagen synthesis, telomere biology, and dermal extracellular matrix remodelling.
Thymosin Alpha-1, Thymosin Beta-4, and immune-modulating peptides studied for T-cell activation and immunoregulatory function.
PT-141 (Bremelanotide) and melanocortin peptides studied for central nervous system pathways in sexual function research.
Kisspeptin, Gonadorelin, and hypothalamic peptides studied for reproductive axis signalling and hormonal regulation.
Latest Research Articles
Peer-reviewed peptide science breakdowns, comparisons, and dosing guides
Retatrutide in 2026: The Triple Agonist That's Rewriting Weight Loss Science
Retatrutide produced 24.2% body weight loss in Phase 2 — the largest ever recorded in an obesity drug trial. Here's what the research shows about how it works, how it compares to tirzepatide and semaglutide, and what's coming in Phase 3.
FDA Peptide Reclassification 2026: What Researchers Need to Know
The FDA has been systematically removing research peptides from the compounding market since 2023. Here's where things stand in 2026, which peptides are affected, and what it means for the research community.
Tirzepatide: The Dual-Action Peptide Outperforming Everything in Metabolic Medicine
Tirzepatide is a first-in-class dual GIP/GLP-1 receptor agonist that is producing weight loss results exceeding anything previously seen with a pharmacological agent. Here's the science behind why it works better than semaglutide.
Epithalon: The Telomere Peptide and Its Role in Longevity Research
Epithalon is a synthetic tetrapeptide derived from the pineal gland. It activates telomerase, extends telomere length, and has shown lifespan extension in multiple animal models. Here is the science behind the most studied longevity peptide.
Selank: The Nootropic Peptide for Anxiety and Mental Clarity
Selank is a synthetic heptapeptide developed in Russia with a 30-year research history. It has anxiolytic, nootropic, and antidepressant properties — without the sedation or dependence of conventional anxiety medications.
CJC-1295: The Long-Acting GHRH Analogue Reshaping Growth Hormone Research
CJC-1295 is a modified form of growth hormone-releasing hormone that lasts days instead of minutes. This guide explains its mechanism, what the human trials show, and how it compares to other GH-stimulating peptides.
Research Peptide Library
12 of 12 peer-reviewed research peptide profiles. Click any card to view the full scientific profile.
Liraglutide
A long-acting GLP-1 receptor agonist approved for type 2 diabetes and obesity - the predecessor to semaglutide with a 13-hour half-life and once-daily dosing.
Cerebrolysin
A standardised mixture of brain-derived neuropeptides that mimics the action of neurotrophic factors - widely used in stroke rehabilitation and neurodegeneration research.
CJC-1295 DAC
A GHRH analogue with a Drug Affinity Complex that binds covalently to albumin - extending half-life to 6-8 days and enabling true once-weekly GH stimulation.
Semaglutide
A GLP-1 receptor agonist best known as Ozempic/Wegovy, used for weight management and diabetes.
Mod GRF 1-29
CJC-1295 without DAC - a modified GHRH analogue with 4 amino acid substitutions for enhanced stability, producing physiological GH pulses when paired with a GHRP peptide.
Tirzepatide
A dual GIP/GLP-1 receptor agonist (Mounjaro/Zepbound) producing the highest weight loss rates of any approved peptide therapy.
Retatrutide
A triple receptor agonist targeting GLP-1, GIP, and glucagon receptors simultaneously - producing the highest weight loss of any peptide in clinical trials to date.
Klotho Peptide
A circulating anti-aging hormone whose levels decline dramatically with age - Klotho deficiency produces premature aging syndromes, while Klotho supplementation reverses cognitive and physical aging in animal models.
Fragment 176-191
The isolated lipolytic fragment of human growth hormone - 16 amino acids that target fat burning without the growth-promoting or diabetogenic effects of full hGH.
BPC-157
Body Protection Compound — a 15-amino acid peptide with remarkable regenerative and healing properties.
GHRP-2
A potent synthetic hexapeptide that stimulates growth hormone release via ghrelin receptors with minimal cortisol elevation compared to GHRP-6.
NAD+
Nicotinamide adenine dinucleotide — the central coenzyme of cellular energy metabolism and a key regulator of longevity pathways including sirtuins.
All 12 peptides shown
Why Trust Know Your Peptide?
We hold ourselves to the same evidence standards as peer-reviewed journals. Here's how every profile is made.
Primary Literature Only
Every mechanistic claim and dosing figure links directly to a peer-reviewed PubMed-indexed study. No uncited assertions.
GP Medical Review
Dosing and safety sections are reviewed by Dr. Amanda Haslett, MBChB MRCGP (GP & Sports Medicine, NHS Scotland) before publication.
PhD Research Team
Profiles are drafted by PhD-level researchers in biochemistry and pharmacology with domain expertise in peptide signaling.
Kept Current
PubMed alerts monitor new publications. High-traffic profiles are reviewed quarterly; all profiles reviewed annually.
Peptide Science: Featured Video
An educational introduction to research peptides: what they are, how they work, and what the science says.
Research & Educational Use Only: Important Disclaimer
All peptides and compounds documented on Know Your Peptide are research chemicals intended exclusively for legitimate scientific research and educational purposes in controlled laboratory settings. They are not approved for human consumption, therapeutic use, or self-administration in most jurisdictions.
All content on this platform, including mechanisms of action, dosing protocols, research summaries, and educational material, is derived from peer-reviewed scientific literature, preclinical studies, and published clinical trial data. Citations are provided where available. This is not medical advice, and no information here should be construed as a recommendation or instruction for human use.
Consult a licensed physician, pharmacist, or qualified research professional before engaging in any peptide-related research activity. The regulatory status of research chemicals varies by country. Always verify legality in your jurisdiction before acquiring or using any compound listed here.
Know Your Peptide is a science education platform. All profiles reference primary research sources. © 2026 Know Your Peptide.