Peptide-S
Ordered peptides from Peptide-S? Mail in a sample (US only) and let us test it.
Test my supplyPeptide-S's purity-focus record is strongest in Tirzepatide and GHK-Cu, with Survodutide also clean on identity and purity but underfilled. Weakness is dispersed: Retatrutide has major fill swings and identity failures, while Tesamorelin and Sermorelin show repeated purity misses; evidence is very recent but batch documentation is uneven.
We investigated who actually operates Peptide-S — corporate records, ownership trails, web infrastructure, and how its lab results break down product by product. Read the full report before you order.
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Ordered peptides from Peptide-S? Mail in a sample (US only) and let us test it.
Test my supply| Date | Result | Test | Lab | Purity | Dosage | Label | COA |
|---|---|---|---|---|---|---|---|
9 Aug 2026 | Pass | Retatrutide Peptide-S | lab name | View COA | |||
9 Aug 2026 | Fail | Retatrutide Peptide-S | lab name | View COA | |||
9 Aug 2026 | Pass | Tirzepatide Peptide-S | lab name | View COA | |||
3 Aug 2026 | Pass | Tesamorelin Peptide-S | lab name | View COA | |||
3 Aug 2026 | Pass | Retatrutide Peptide-S | lab name | View COA | |||
10 Mar 2026 | Pass | Retatrutide Peptide-S | lab name | View COA | |||
4 Mar 2026 | Pass | Tirzepatide Peptide-S | lab name | View COA | |||
2 Mar 2026 | Pass | Tirzepatide Peptide-S | lab name | View COA | |||
2 Mar 2026 | Pass | Tirzepatide Peptide-S | lab name | View COA | |||
26 Feb 2026 | Pass | Tirzepatide Peptide-S | lab name | View COA | |||
About Peptide-S test results from Finnrick
Peptide-S is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 11 peptides and 133 tests, including ratings, observed price signals, recent test dates, and correction history where available.
Finnrick ratings are calculated from published sample data using the selected rating standard. The default standard evaluates purity, dose accuracy, and label quality, then adjusts low-volume results so small sample counts do not appear more certain than the data supports.
The most visible Peptide-S peptides in this dataset are BPC-157 (5 tests), Cagrilintide (4 tests) and GHK-Cu (9 tests). Use the peptide table above to compare the current Finnrick rating, price per mg, and sample volume for each peptide.
Recent tests and corrections are shown below when available. Samples may be acquired by Finnrick directly or submitted through Finnrick testing programs; the goal is to make safety and supply-chain evidence easier to evaluate than vendor marketing claims alone. This page currently lists 133 recent tests. It also includes 2 corrections related to this vendor.
Ordered peptides from Peptide-S? Mail in a sample (US only) and let us test it.
Test my supply