Research Peptides Trusted by Laboratories
Third-party tested peptides and blends, for laboratory research use. Every batch ships with a Certificate of Analysis.
Every account is reviewed before approval. That is what keeps this catalog restricted to laboratory and research end users.
Analytical rigor is the product.
Independent third-party COA verification on every peptide, with orthogonal methods confirming both identity and purity. Our catalog is built for researchers who verify what they receive.
COA on every batch
HPLC purity, mass spec identity, endotoxin and residual solvent reports, linked on every product page.
GMP-certified, USA made
Synthesized in GMP-certified US facilities and shipped from our Florida warehouse, same day on weekday orders.
Reviewed accounts
Every application is checked automatically before approval, usually within a few seconds. Catalog and pricing are for approved account holders only.
Verify what you receive.
Reports and methods behind every lot, open to anyone.
How we read an HPLC purity report, peak by peak
What the chromatogram shows, where the 99% number comes from, and what a failing lot looks like.
Read more →Endotoxin testing on lyophilized peptides
Why every lot is tested for bacterial endotoxin and how the limit is set per vial size.
Read more →Residual solvent screening after synthesis
The solvents left behind by peptide synthesis and the limits each lot has to clear before release.
Read more →Our commitment to your research
Verified materials, reliable delivery, and full transparency. Every order, every time.
Questions researchers ask first.
What types of products do you sell?
We supply research peptides for laboratory use: single peptides, blends, atomized solutions and capsules. Every product ships with a Certificate of Analysis. These materials are not drugs, supplements, or veterinary products, and are not for human or animal use.
How should peptides be stored?
Lyophilized peptides are stable at room temperature in their unopened, sealed state. Freezer storage is recommended for long-term holding. Once reconstituted, material should be refrigerated. See the storage guidance on each product page.
What analytical testing do you perform?
Identity and purity are confirmed by independent third-party laboratories using orthogonal methods, chromatographic, mass spectrometric, and spectroscopic, so no single assay is the sole basis for a result. COAs are linked on each product page and in our Testing Library.
Why do I need an account to purchase?
We review every account application before granting catalog access. This confirms materials are going to qualified research settings and keeps our customer base consistent with our research-use-only policy. Applications are typically reviewed within a few seconds.
Do you ship internationally?
No. We ship within the United States only, including U.S. territories. Orders cannot be placed from or shipped to international addresses.
How do I know I am on the real Licensed Peptides site?
Our only website is licensedpeptides.com. We do not operate any other store, and we have no authorized resellers or distributors. If another site offers Licensed Peptides products or asks you to send payment, it is not us. Check the address bar before you pay.