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Pure Peptides supplies US researchers with independently tested, high purity research peptides. Every peptide is third-party HPLC verified and ships from our US warehouse the same business day when ordered before 12pm EST. A batch-specific Certificate of Analysis is viewable and downloadable on the product page.
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Browse Peptides by Category
Not sure where to start? Every compound is grouped by the pathway it is studied in.
Growth Hormone Axis Research
Peptides targeting the somatotropic axis: GHRHs, GHRPs, and IGF-1 analogs for growth hormone pathway research.
ExploreRegeneration Research
Research peptides for tissue and cellular repair: BPC-157, TB-500, GHK-Cu, LL-37, and related compounds.
ExplorePeptide Bioregulators
Short-chain regulatory peptides including the Khavinson bioregulator series of organ-specific oligopeptides, alongside related immunomodulatory peptides for research use.
ExploreCognitive & Neuropeptide Research
Nootropic and neuropeptide compounds for cognitive and neurological pathway research, including Semax, Selank, and Dihexa.
ExploreMetabolic & Cellular Research
Peptides and small molecules targeting metabolic pathways, mitochondrial function, and cellular regulation.
ExploreMelanocortin & Endocrine Research
Melanocortin receptor agonists and endocrine signaling peptides for receptor binding and hormonal pathway research.
ExploreDermal Peptide Research
Signal peptides for in-vitro dermal biology research, including Matrixyl, PAL-GHK, and SNAP-8.
ExploreImmune & Thymic Research
Thymic and immune signalling peptides for in-vitro immunology research, including Thymosin Alpha-1, Thymulin, Thymagen, and HEP-1.
ExploreAll Research Peptides
The full catalog of 75+ HPLC-verified research compounds in one place.
Most Popular Peptides
Our best-selling research compounds, US-stocked and ready to ship the same business day
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Research compounds organised by study area
Growth Hormone Axis Research
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Cognitive & Neuropeptide Research
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>99%Metabolic & Cellular Research
Melanocortin & Endocrine Research
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>99%Dermal Peptide Research
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>99%Where to Buy Peptides.
Among US peptide companies, Pure Peptides stands out as a domestic research supplier researchers can trust. When researchers across the United States need to purchase peptides for in-vitro study, they need a supplier that delivers consistent purity, full documentation, and reliable stock without the delays of international shipping.
Every compound in our catalog, from BPC-157 and TB-500 to Semax and GHK-Cu, is independently tested by a third-party accredited laboratory before dispatch. A batch-specific Certificate of Analysis is available to view and download directly on the product page, confirming the purity, identity, and molecular weight of your compound.
We stock over 75 research-grade peptides with cold-chain packaging and full MSDS documentation on every order. Orders confirmed before 12pm EST are dispatched the same business day; orders confirmed after 12pm EST are dispatched the next business day. Whether purchasing for a single experiment or an ongoing multi-phase research program, our team is equipped to support you.
What to look for when purchasing peptides.
Independent third-party testing
A reputable US peptide supplier will provide HPLC results from an independent accredited laboratory, not in-house testing where the supplier has a financial interest in the result.
Batch-specific COA
Generic certificates covering multiple batches are a red flag. Insist on lot-specific documentation matching your order.
US-held stock
US-stocked peptides ship faster and are dispatched under domestic cold-chain handling requirements.
Transparent pricing
Research budgets are finite. We publish clear pricing with no hidden fees. Bulk and custom-synthesis pricing available on request.
The Pure Peptides Standard
At Pure Peptides, we recognize that the validity of your research depends entirely on the precision of your compounds. That is why independent third-party testing is not optional for us. It is the foundation of everything we dispatch.
>99% Purity Guaranteed
Every batch independently verified by a third-party accredited laboratory before dispatch.
Cold-Chain Shipping
Thermal insulation and cold packs on every order, included at no extra charge.
Batch-Specific COAs
Lot-level Certificates of Analysis, published and searchable by batch number. Not generic multi-batch documents.
No In-House Testing
We do not test our own products. Third-party results only, removing the conflict of interest.
Latest Research
Scientifically reviewed articles on our research compounds.
Growth Hormone Secretagogues Research
Growth hormone secretagogues (GHS) are molecules studied for their ability to make the pituitary gland release growth hormone (GH). Research so far has found that these molecules can reach the same end point by different routes or pathways. This article compar
Read ResearchMetabolic Peptides Research
NAD+, SS-31 and AICAR are all studied in relation to cellular energy metabolism and mitochondrial function, but they work in different ways. NAD+ is an essential coenzyme that several classes of enzyme depend on. SS-31 is a mitochondria-targeted peptide that a
Read ResearchDermal Peptides Research
GHK-Cu, Matrixyl, PAL-GHK and Snap-8 all appear in dermal research, but they do not all act through the same biological pathway. This article discusses GHK-Cu, Matrixyl and PAL-GHK in relation to collagen and extracellular matrix (ECM) biology. Snap-8 is studi
Read ResearchIGF-1 Family Research
The IGF-1 family includes several research compounds. Each one acts within the insulin-like growth factor 1 (IGF-1) signaling system, or is derived from it. Growth hormone secretagogues work upstream at the pituitary to raise growth hormone, but these compound
Read ResearchMyostatin Pathway Research
The myostatin pathway is one of the clearest biological systems involved in limiting skeletal muscle growth. GDF-8, Follistatin and ACE-031 each act at a different point in this pathway: GDF-8 provides the inhibitory signal, and Follistatin binds and neutraliz
Read ResearchVesilute Research
Vesilute is a trade name for the dipeptide Glu-Asp. The one indexed animal study found no difference from its amino acids on the three endpoints it measured.
Read ResearchThymulin Research
Thymulin is a zinc-dependent thymic nonapeptide. Its human trials date from the 1980s, it is approved nowhere, and its newest evidence is preclinical.
Read ResearchThymosin Beta-4 Research
Thymosin beta-4 (timbetasin) is the 43-residue parent of TB-500, not the same molecule. Review of its Phase 3 record, nulls and conflicts.
Read ResearchThymagen Research
Thymagen, alpha-Glu-Trp, is in Russian-registered medicines. Its Kaposi's sarcoma Phase III found no benefit over placebo and shorter time to progression.
Read ResearchSermorelin Research
Sermorelin held two FDA approvals, both withdrawn in 2009. What the primary regulatory record and the small human trial base actually establish.
Read ResearchPYY 3-36 Research
PYY 3-36 research: human appetite infusion findings, a contested rodent replication record, dose-limiting nausea, and a Phase 2 trial that missed.
Read ResearchPTD-DBM Research
PTD-DBM is a CXXC5-blocking peptide studied in cells and mice for wound healing and hair regrowth. ClinicalTrials.gov lists no human trial of it.
Read ResearchPEG-MGF Research
PEG-MGF research reviewed: one PubMed record, no peer-reviewed human studies, no CAS, and an FDA compounding nomination withdrawn by its nominator.
Read ResearchPE-22-28 Research
A spadin-derived peptide designed to block TREK-1, PE-22-28 has three preclinical papers, no independent replication and no trial on ClinicalTrials.gov.
Read ResearchP021 Research
P021 research is sixteen years of animal and cell studies with no independent replication. No human trial has ever run. What the evidence shows and omits.
Read ResearchOrexin-B Research
Orexin-B research is small: 81 title-level papers against 868 for orexin-A, no human dosing study, and a mouse blood-brain barrier null.
Read ResearchOrexin-A Research
Orexin-A is mostly measured, not given: four small human intranasal studies, wakefulness nulls, and approved insomnia drugs that block its receptors.
Read ResearchSNAP-8 Research
A PubMed search for acetyl octapeptide-3 returns two papers, and neither tests it alone. ClinicalTrials.gov lists none. What the SNAP-8 record contains.
Read ResearchFrom the Blog
Background and context on the compounds we supply.
GDF-8 (Myostatin) Restrains Muscle Growth, and Four Species Point the Same Way
GDF-8 is myostatin, a protein that restrains muscle growth. Deleting or mutating its gene points the same way in mice, cattle, dogs and one child, though in mice the larger muscle was not the stronger one.
Read PostIpamorelin: The Peptides Came First, Then the Receptor, Then the Hormone
GHRP-6 was reported in 1984, its receptor found in 1996 and the body's own hormone for it in 1999. The hormone that came last reclassified the whole family.
Read PostAn Adipotide Result Drew a Public Objection. Someone Built a Study to Test It.
A primate weight-loss result drew a published objection: maybe it was just reduced eating. A separate study, built specifically to test that, found the effect held up anyway.
Read PostAICAR Doesn't Do the Thing It's Named For. Here's How That Was Shown.
AICAR is usually described as an AMPK activator. Two experiments, each blocking a different step of the same pathway, point instead to a different molecule doing the work.
Read PostKisspeptin-10's Human Record Comes From at Least Four Independent Groups
Kisspeptin-10's human studies come from at least four independent research groups on three continents. Its 54-residue relative's record is close to a single group's program.
Read PostOrexin-A Was Discovered Twice in the Same Year, and Neither Name Won
Orexin-A was found by two research groups in the same year, each with its own name for it. Both names are still in use, even inside the same body of work.
Read PostLivagen Was Tested Against a Better-Known Relative. It Came Second.
Livagen was tested head to head against Epitalon in the same study. The paper's own conclusion named Epitalon as the more protective agent.
Read PostTestagen Really Does Show Up in a Clinical Trial Search. That Trial Isn't It.
A clinical trial really does show up when you search Testagen's name. It belongs to an unrelated testosterone patch, not the peptide sold here.
Read PostSermorelin Sits in a Regulatory Category Most Compounds Don't
Sermorelin held two full US approvals. Both are gone. A 2013 FDA finding states plainly that neither left the market for safety or efficacy reasons.
Read PostChemistry & Handling References
Molecular identity, reconstitution, storage and verification, compound by compound.
ACE-031
What ACE-031 is chemically and how to handle it in the lab: fusion protein structure, reconstitution, storage, stability, and verification.
Read ReferenceACTH 1-39
What ACTH 1-39 is chemically and how to handle it in the lab: 39 residue polypeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceADAMAX
ADAMAX, C50H69N11O11S, 1032.24 g/mol, purity greater than 99 percent. Capped heptapeptide profile, reconstitution chemistry, storage, HPLC and MS verification.
Read ReferenceAICAR
What AICAR is chemically and how to handle it in the lab: nucleoside structure, reconstitution, storage, stability, and verification.
Read ReferenceAOD-9604
What AOD-9604 is chemically and how to handle it in the lab: disulfide cyclised peptide structure, reconstitution, storage, stability, and verification.
Read ReferenceARA-290
ARA-290, CAS 1208243-50-8, 1257.32 g/mol, purity greater than 99 percent. Eleven-residue peptide profile, reconstitution chemistry, storage, HPLC and MS verification.
Read ReferenceAdipotide
What Adipotide is chemically and how to handle it in the lab: chimeric peptidomimetic structure, reconstitution, storage, stability, and verification.
Read ReferenceB7-33
B7-33, CAS 1818415-56-3, C131H229N41O36S, purity greater than 99 percent. Peptide profile, reconstitution chemistry, storage, HPLC and MS verification.
Read ReferenceBPC-157
What BPC-157 is chemically and how to handle it in the lab: pentadecapeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceBronchogen
What Bronchogen is chemically and how to handle it in the lab: tetrapeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCJC-1295 (No DAC)
What CJC-1295 (No DAC) is chemically and how to handle it in the lab: 29 residue peptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCJC-1295 with DAC
What CJC-1295 with DAC is chemically and how to handle it in the lab: 30 residue peptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCardiogen
What Cardiogen is chemically and how to handle it in the lab: tetrapeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCartalax
What Cartalax is chemically and how to handle it in the lab: tripeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCerebrolysin
Cerebrolysin, CAS 12656-61-0, porcine brain peptide preparation, purity greater than 99 percent. Substance profile, reconstitution, storage and verification.
Read ReferenceColivelin
What Colivelin is chemically and how to handle it in the lab: hybrid peptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCortagen
What Cortagen is chemically and how to handle it in the lab: tetrapeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCrystagen
What Crystagen is chemically and how to handle it in the lab: tripeptide structure, reconstitution, storage, stability, and verification.
Read ReferenceCertificate of Analysis Library
Every batch certificate on file, issued by an independent third-party laboratory.
Growth Hormone Axis Research
10Regeneration Research
7Peptide Bioregulators
14Cognitive & Neuropeptide Research
6Metabolic & Cellular Research
5Melanocortin & Endocrine Research
4Dermal Peptide Research
3Immune & Thymic Research
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