Pepwerk
Is Pepwerk legit? What the records show
We have tracked Pepwerk since Sep 2026 and follow 20 of their products, covering 16 peptides. Prices run from €29.95 to €109.95. On their own certificates, 4 of 6 measured vials are more than 3% over or under the amount on the label.
Check it yourself: find the report number or QR code on a certificate and look it up on the lab's own website.
Higher than 59% of the 894 shops we score
Max 60 until we lab-test them.
The shaded part is the shops Pepwerk scores higher than.
Our lab testLocked / 40Not tested yet
We have not sent a Pepwerk product to an independent lab yet, so these 40 points are locked. The lab report will go on this page when we do.
Reviews0 / 20No reviews found online
We found no reviews for them on external review sites.
That gives 0 of 20.
Community1.5 / 15Little or no talk found
We found little to no forum or Reddit talk about them. Nobody has left a review on Peptide Scanner yet.
That gives 1.5 of 15.
Certificates17 / 254 of 16 peptides covered
Publishing: 12 of 15. 40 files from their website that look like certificates are waiting for our check. We have not counted them yet.
Claims match: 5 of 10. Too few of their certificates show a vial or purity result we can check against their product pages, so this part holds a neutral 5.
Their claims against their certificates: 4 of 6 measured vials off label.
A certificate is the shop's own document. It is not our test.
Pepwerk reviews
No reviews on Peptide Scanner yet.
Bought from Pepwerk?
Write a reviewPepwerk prices
Checked 7 Nov 2026
Show all 20 prices ↓Showing all 20 prices
Ships to: Germany
Their certificates vs their claims
No site-wide purity promise found on their website. Vial content is still checked against the label.
- certificates read
- 6
- vials outside ±3% of label
- 4 / 6
- beyond ±10% (major)
- 1
- site-wide purity claim to check
- None
How this is checked
- Vial content
- Measured net peptide content against the size on the label. Within ±3% is on label, 3 to 10% is off label, beyond ±10% is a major deviation (under- or overfilled). When a certificate weighs several vials of the batch, the vial farthest from the label is the one judged, and with several purity results the lowest counts. Blends are only checked when the certificate lists each component.
- Purity
- HPLC purity on each certificate against the purity the supplier promises site-wide on its own website. Up to 1 point below the claim is amber, more than that is red. Only a direct promise counts (“99%+ purity guaranteed”); explanations of what purity means, one product's figure and page code are not treated as a claim. A certificate that reports only a bound (“>99%”) is judged only when the bound meets the claim, and a specification line is never read as a result.
- Whose certificate
- A certificate is only read once our client-identity review has looked at it, and one issued to a different company is left out. A certificate issued to the company that runs the supplier's own website counts as the supplier's. A file hosted on another supplier's website is not counted for this one. Only peptide certificates are read: bacteriostatic water, acetic acid and other diluents are left out, and so are product data sheets, which state a specification rather than a batch result.
- Main impurity
- Shown when the certificate itemises it: a named impurity (TFA, deletion sequence, oxidation…) or the largest secondary peak in the HPLC peak table. Most certificates report only a purity figure, so the rest of the sample is not itemised.
- Score
- These checks are 10 of the 25 certificate points: vial content 7 (full credit within ±3%, half up to ±10%, none beyond, over- and underfilled alike), purity 3 (98% is the bar when a supplier advertises no figure). Fewer than 5 readable results gives half credit rather than a guess.
- Source and limits
- These are the supplier's own published certificates, read automatically from the PDF or image. Janoshik results tables are read twice from the image, cell by cell, and a figure the two readings disagree on is left out rather than guessed. A certificate covers one batch on one date. We have not tested these batches ourselves.
| Product | Label to measured | Purity | Main impurity | Lab | Certificate |
|---|---|---|---|---|---|
| Triple-G 10mg | 10mg → 12.23mg Overfilled +22.3% | 99.841% | 0.16% not itemised | janoshik | Open certificate Triple-G 10mg |
| GHK-Cu 100mg | 100mg → 106.5mg Over label +6.5% | 99.963% | 0.04% not itemised | janoshik | Open certificate GHK-Cu 100mg |
| TB-500 10mg | 10mg → 10.4mg Over label +4.0% | 99.076% | 0.92% not itemised | janoshik | Open certificate TB-500 10mg |
| Triple-G 30mg | 30mg → 32.68mg Over label +8.9% | 99.888% | 0.11% not itemised | janoshik | Open certificate Triple-G 30mg |
| Mots-c 10mg | 10mg → 10.24mg On label +2.4% | 99.401% | 0.60% not itemised | janoshik | Open certificate Mots-c 10mg |
| Tesamorelin 10mg | 10mg → 9.9mg On label -1.0% | 97.634% | 2.37% not itemised | janoshik | Open certificate Tesamorelin 10mg |
Pepwerk FAQ
Is Pepwerk legit?
We score Pepwerk 19 of 60, from reviews, community posts and the certificates they publish. We have not lab-tested them yet. The reasons for each part of the score are in the verdict above.
How much does Pepwerk charge?
On 7 Nov 2026 we tracked 20 prices from €29.95 to €109.95. The cheapest is Semax at €29.95. The full list is in the price table above.
Where does Pepwerk ship?
They ship to Germany.
Has Peptide Scanner tested Pepwerk?
Not yet. Lab results are worth 40 points, and those stay locked until we test one of their products at an independent lab.
We don't sell peptides. No shop pays for its score. How we score · What the badges mean · Report an issue with this page