Finnrick, an independent testing programme, publishes 130 assays for Peptide-S: 89 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 37 did not. Most recent assay 3 Aug 2026.
Peptide-S listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/peptide-s.
Peptide-S sells direct to researchers and at wholesale. It lists 186 products, including Ipamorelin, BPC-157 + TB-500, Vilon, Thymosin Alpha-1, Thymalin, and Testagen, plus 41 other compounds.
In its own words: “Looks like you haven’t added anything yet. Start exploring our products and find what you need.”
Of the 12 product pages we opened, every one links its own certificate.
Prices run from $27.99 to $219.99 across 186 listed products. Orders ship with UPS and USPS.
Site check: 186 products listed; ships via UPS, USPS.
Peptide-S is listed as active. Finnrick Grade C. Finnrick avg score: 7.2/10 across 128 samples (11 products). Mixed quality — some products test well, others below average.
Peptide-S holds independent lab grade C, assigned across 128 graded samples, average score 7.2/10. That grade comes from an independent grader's own sampling, not from PeptideAtlas, and it describes the samples that grader obtained rather than every batch sold.
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Returns and guarantees
Returns
Returns, cancellations, and refunds are governed by our Refund Policy. Due to the nature of the products, certain items may be non-returnable except where required by law or where a product is defective or incorrect, as described in the Refund Policy.
Research-use notice
Published on the site
Company details
Legal name
Peptides.com
Basis for location
Site copy references United States
Contact channels
Contact page
https://peptides.com/contact-us/
Testing and certificates
Products listed
186
How we checked
These details were read from Peptide-S's own website on 2026-08-10. Pages consulted:
Peptide-S is listed as active and we hold 130 Finnrick assays (89 passing, 37 failing its purity threshold); an independent lab grade of C. That is evidence about the batches that were tested or published, not a guarantee about the vial you receive.
Has Peptide-S been lab tested?
Yes. Finnrick, an independent testing programme, publishes 130 assays for Peptide-S: 89 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 37 did not. Most recent assay 3 Aug 2026.