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The Definitive Guide to US-Sourced Research Peptides
Unbiased vendor comparisons, verified purity data, and expert educational resources. We help researchers make informed sourcing decisions with confidence.
Verified HPLC Reports
Every vendor evaluated on third-party analytical testing standards and transparency.
US-Domestic Only
All reviewed vendors are US-based with domestic shipping for faster, safer delivery.
99%+ Purity Guaranteed
Top-rated vendors guarantee research-grade purity verified by independent laboratories.
US Peptide Vendor Comparison
Side-by-side comparison of top domestic peptide vendors, evaluated on lab testing, shipping, and overall reliability.
| Rank | Vendor | Lab Testing | Shipping | Payment | Score | |
|---|---|---|---|---|---|---|
| 1 | MP MedgePeptidesEditor's Choice | Every Batch (Third-Party HPLC + MS) | 1-2 Business Days | Credit Card, Crypto +2 | 9.8 | Review |
| 2 | PS Peptide Sciences | Monthly Third-Party HPLC | 2-4 Business Days | Credit Card, Crypto | 8.5 | Review |
| 3 | RP ResearchPeptides USA | Bi-Monthly Third-Party HPLC | 2-4 Business Days | Credit Card, Wire Transfer | 7.9 | Review |
| 4 | CP Core Peptides | Quarterly Third-Party | 3-5 Business Days | Credit Card, Zelle | 7.8 | Review |
| 5 | AA Amino Asylum | Batch Testing (In-House + Annual Third-Party) | 2-3 Business Days | Credit Card, Crypto +1 | 7.2 | Review |
Featured Research Compounds
In-depth profiles of the most researched peptides, complete with chemical data, synthesis details, and sourcing guidance.
C62H98N16O22
BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide derived from a naturally occurring protein found ...
Learn MoreC187H291N45O59
Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist that has become one of the most intensely studied pept...
Learn MoreC212H350N56O78S
TB-500 is a synthetic version of the naturally occurring peptide Thymosin Beta-4, a 43-amino acid protein that is found ...
Learn MoreC50H68N14O10
PT-141 (Bremelanotide) is a cyclic heptapeptide that acts as a melanocortin receptor agonist, with particular affinity f...
Learn MoreC152H252N44O42
CJC-1295 is a synthetic analog of growth hormone releasing hormone (GHRH) that has been structurally modified to extend ...
Learn MoreC38H49N9O5
Ipamorelin is a synthetic pentapeptide growth hormone secretagogue that activates the ghrelin/growth hormone secretagogu...
Learn MoreLatest Research Education
Expert guides on peptide science, quality testing, and best practices for research professionals.
A Certificate of Analysis is your first line of defense against impure or misidentified research peptides. Learn exactly what to look for and what each section means.
Two analytical techniques dominate peptide quality control. Understand the differences between HPLC and mass spectrometry, and why the best vendors use both.
Proper storage and reconstitution are critical for maintaining peptide integrity. Learn the techniques that ensure your research compounds remain viable.
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