Peptide Science
Research and Education Hub
One Stop Peptide Science Reference
Peer-reviewed, citation-backed profiles on 167+ 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.
Find My First Peptide
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What is your primary research interest?
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
How to Compare Peptide Vendors for Laboratory Research Without Chasing Rankings
A laboratory-procurement decision framework for comparing documentation, traceability, methods, and support—not a list of product recommendations.
How to Read a Peptide COA: What Independent Testing Can and Cannot Show
A practical guide to batch-specific certificates of analysis, chromatograms, mass confirmation, method limits, and the questions a PDF cannot answer.
Are Online Peptide Companies Legitimate? Research-Use-Only Red Flags to Check
How to evaluate online research-supplier claims without confusing marketing language, product documentation, or a COA with a guarantee of quality or suitability.
How to Evaluate a Peptide Company: A Research Documentation Checklist
A research-use-only framework for comparing peptide supplier documentation: lot matching, analytical methods, identity claims, and the limits of a COA.
Kylo Peptides Review: Published Lot COAs, the Koi Rebrand, and What the Membership Actually Saves
Kylo Peptides publishes a certificate for every lot, indexed by the number printed on the vial. We look at what is verifiable, where the marketing runs ahead of the paperwork, and whether the lifetime membership is worth it.
Retatrutide Half-Life and Pharmacokinetics: Why Once Weekly Works
The six day half-life explained, plus accumulation math showing why plasma levels keep climbing to week 5. Why a week 2 experience does not predict week 6, missed dose behaviour, and washout timing.
Research Peptide Library
12 of 12 peer-reviewed research peptide profiles. Click any card to view the full scientific profile.
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.
BPC-157
Body Protection Compound — a 15-amino acid peptide with remarkable regenerative and healing properties.
GHK-Cu (Copper Peptide)
A naturally occurring copper complex with powerful skin regeneration, anti-aging, and wound healing properties.
Tirzepatide
A dual GIP/GLP-1 receptor agonist (Mounjaro/Zepbound) producing the highest weight loss rates of any approved peptide therapy.
NAD+
Nicotinamide adenine dinucleotide — the central coenzyme of cellular energy metabolism and a key regulator of longevity pathways including sirtuins.
TB-500 (Thymosin Beta-4)
A synthetic version of the naturally occurring Thymosin Beta-4 protein, known for potent healing and anti-inflammatory effects.
Semaglutide
A GLP-1 receptor agonist best known as Ozempic/Wegovy, used for weight management and diabetes.
Ipamorelin
A selective growth hormone secretagogue that stimulates GH release with minimal side effects.
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.
GHRP-2
A potent synthetic hexapeptide that stimulates growth hormone release via ghrelin receptors with minimal cortisol elevation compared to GHRP-6.
Cerebrolysin
A standardised mixture of brain-derived neuropeptides that mimics the action of neurotrophic factors - widely used in stroke rehabilitation and neurodegeneration research.
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.
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.
Compare research peptide suppliers
Review COA documentation, testing, operating history, and community feedback in our independent supplier directory. Research chemicals are not approved for human use.
Primary Literature Only
Every mechanistic claim and dosing figure links directly to a peer-reviewed PubMed-indexed study. No uncited assertions.
Clinical Safety Review
Dosing and safety sections undergo clinical safety review before publication, covering appropriateness of disclaimers and clinical context.
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.