Buy Peptides, Independently Verified. Shipped from the US.
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
>99%>99%>99%>99%Regeneration 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.
The Modification Doesn't Make It Stronger. It Makes It Harder to Catch.
IGF-1 LR3 outperforms native IGF-1 where binding proteins are present and underperforms it where they are absent. The same experiment shows both.
Read PostThe Same Gene Makes Two Different Peptides, Depending on Where It's Read
Mitochondria read the genetic code slightly differently from the rest of the cell. For humanin that means two peptides of different lengths, from one gene.
Read PostA Designation Is a Starting Gun, Not a Finish Line
Orphan designation gets read as a milestone reached. It is an incentive granted before the work is done, and thymosin alpha-1 shows the difference.
Read PostA Safety Reputation Doesn't Transfer Between Molecules, Even Close Ones
PT-141 and melanotan II get treated as near-enough the same thing. One is named on an FDA safety-risk list and one is not, and the split is documented.
Read PostThree Amino Acids Were Bolted On for One Reason: to Stop It Falling Apart
Selank is tuftsin, a fragment of an antibody, with three amino acids added at one end for a single stated purpose: to stop it degrading before it can act.
Read PostThe Central Claim About These Peptides Is That They Touch DNA Directly
Almost everything in pharmacology starts by binding a receptor. The claim made for these peptides is that they skip that step and reach the gene itself.
Read PostDNSP-11 Comes From the Part of a Protein That Gets Thrown Away
A cell trims its proteins and discards the offcuts. DNSP-11 is eleven amino acids from one of those offcuts, and whether a living body makes it is an open question.
Read PostEvery One of These Peptides Started as an Extract of the Organ It's Named After
The names record the organ each compound's original extract came from, and that origin is also the series' central scientific claim.
Read PostBPC-157 Was Built From a Protein Found in Human Stomach Fluid
The origin story everyone repeats about BPC-157 is close to right. The precise version is more interesting, and it changes how you read the whole literature.
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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