Pure Peptides for Research — Most Published Lots 99%+ HPLC Purity, Certificates Published, U.S. Shipped

Research peptides with the lab work published

Pure U.S. Peptides supplies research peptides to laboratories and independent researchers across the United States. Every order ships from the U.S., U.S. shipping is free, and every order includes a vial of bacteriostatic water. The part we care most about is the one you can check yourself: we publish our certificates of analysis, with the results written out as text, before you order.

Certificates you can read before you buy

Our certificates page lists 32 published certificates of analysis, covering 34 of our 53 listings. Each certificate has its own page, with the compound, the lot or report number, the testing laboratory and the date. We also type out the results, including HPLC purity where the lab tested it and endotoxin where it was measured, so you do not have to open a PDF to read them. The PDF is linked from every certificate page.

28 of the 31 certificates that report a purity figure show 99% or higher, and each certificate shows the exact figure for its own lot or report where tested. Where a listing does not yet have its own certificate, its product page says so plainly, rather than borrowing a number from another product or another vial size.

31 of our 32 certificates come from Vanguard Laboratory, which holds A2LA accreditation to ISO/IEC 17025. That accreditation covers only the specific methods listed on the laboratory's A2LA certificate, not every analysis it performs, so it does not mean every result on our certificates is accredited. Where a certificate comes from a different lab, its page names that lab and says what the certificate does and does not show.

Where to start: SS-31 and other compounds with a published certificate

SS-31 (elamipretide), 50mg has a published certificate of analysis: Kovera Labs report KVR-2026-814088, with purity of 99.536% by RP-HPLC and identity confirmed by LC-MS. Read the SS-31 certificate or see the MOTS-c + SS-31 bundle.

Other compounds with a published certificate include BPC-157 10mg, TB-500 10mg, GLP-3 R 10mg and GLP-2 T 10mg. The full catalog is on all peptides.

What every order includes

• Free U.S. shipping on every order, with no minimum.
• Free bacteriostatic water, one 10mL vial with every order.
• Same-day dispatch for orders placed before 2 PM ET, Monday to Friday, with tracking.
• Free peptides on larger carts. Count the peptide items in one cart (a bundle counts as one item): 5 items earn 1 free (1 from the first list); 10 items earn 1 free (1 from the second list); 15 items earn 2 free (1 from the first list and 1 from the second list); 20 items earn 3 free (1 from the first list and 2 from the second list). First list: BPC-157 10mg, GHK-Cu 100mg, Selank 10mg, Semax 10mg. Second list: TB-500 10mg, GLP3-R 10mg, GLP2-T 10mg, MOTS-c 40mg. BAC water, supplies and kits don't count toward the total.

How to check any peptide supplier, including us

Before you order research peptides from anyone, ask four things:

1. Is a certificate published for this exact product and size, with the lab, the lot or report number and the date you can check, or only a general "tested" badge?
2. Is the certificate from a named, independent laboratory?
3. Does the listed purity come from a method the certificate names, such as HPLC?
4. Can you read the certificate before paying, without an account?

Our certificates page puts the lab, the method and the results for every certificate we publish in one place, readable without an account. A certificate describes the sample the laboratory tested; it is not a guarantee about the unit you receive. Our guide on how to evaluate a peptide vendor walks through each check.

For research use only

All products are sold strictly for laboratory research use. They are not for human or veterinary use, not for use as food, drugs or cosmetics, and not for diagnostic or therapeutic purposes. This site is for adults 21 and older purchasing for research purposes only.