Penguin Peptides
Is Penguin Peptides legit? What the records show
We have tracked Penguin Peptides since Sep 2026 and follow 11 of their products. Prices run from $40.00 to $76.00. On their own certificates, 40 of 48 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 70% of the 894 shops we score
Max 60 until we lab-test them.
The shaded part is the shops Penguin Peptides scores higher than.
Our lab testLocked / 40Not tested yet
We have not sent a Penguin Peptides 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.
Community3 / 15Forum talk is thin
Forum and Reddit talk about them is thin. Nobody has left a review on Peptide Scanner yet.
That gives 3 of 15.
Certificates17.7 / 253 of 11 peptides covered
Publishing: 12.3 of 15. We hold 54 lab certificates from their website, naming Janoshik. We found 44 of the 54 on the issuing lab's own website (not every lab has a public lookup). 3 of the 11 peptides we track have a matching certificate from an independent lab (any size counts). 0 of the 54 certificates include a contamination test (endotoxin, sterility or heavy metals). 12 of 46 dated certificates were issued in the last 6 months. Newest: Jun 2026 (4 months old). Oldest: Jan 2026.
Claims match: 5.4 of 10. Their own certificates against their claims: 8 of 48 measured vials are within 3% of the label (32 overfilled, 8 underfilled); 4 of 49 certificates fall below 98% purity.
Their claims against their certificates: 40 of 48 measured vials off label.
A certificate is the shop's own document. It is not our test.
Penguin Peptides reviews
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Checked 7 Nov 2026
Their certificates vs their claims
No site-wide purity promise found on their website. Vial content is still checked against the label.
- certificates read
- 52
- vials outside ±3% of label
- 40 / 48
- beyond ±10% (major)
- 20
- 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 |
|---|---|---|---|---|---|
| BPC 157 10mg e | 10mg → 11.91mg Overfilled +19.1% | 99.783% | 0.22% not itemised | janoshik | Open certificate BPC 157 10mg e |
| BPC-157 + TB-500 5mg+5mg | BPC-157: 5mg → 5.6mg Overfilled +12.0% TB-500 (TB4): 5mg → 5.29mg Over label +5.8% | Not read | Not itemised | janoshik | Open certificate BPC-157 + TB-500 5mg+5mg |
| DSIP 5mg | 5mg → 4.46mg Underfilled -10.8% | 99.028% | 0.97% not itemised | janoshik | Open certificate DSIP 5mg |
| GHK-CU 100mg e | 100mg → 112.46mg Overfilled +12.5% | 99.547% | 0.45% not itemised | janoshik | Open certificate GHK-CU 100mg e |
| GLP-1 C 10mg e | 10mg → 11.29mg Overfilled +12.9% | 99.85% | 0.15% not itemised | janoshik | Open certificate GLP-1 C 10mg e |
| GLP-1 C 5mg e | 5mg → 5.6mg Overfilled +12.0% | 99.83% | 0.17% not itemised | janoshik | Open certificate GLP-1 C 5mg e |
| GLP-1 T 30mg e | 30mg → 33.56mg Overfilled +11.9% | 99.875% | 0.13% not itemised | janoshik | Open certificate GLP-1 T 30mg e |
| GLP-1 T 50mg e | 50mg → 55.76mg Overfilled +11.5% | 99.9% | 0.10% not itemised | janoshik | Open certificate GLP-1 T 50mg e |
Show all 52 certificates read ↓Showing all 52 certificates read
| Product | Label to measured | Purity | Main impurity | Lab | Certificate |
|---|---|---|---|---|---|
| GLP-1 T 60mg e | 60mg → 67mg Overfilled +11.7% | 99.859% | 0.14% not itemised | janoshik | Open certificate GLP-1 T 60mg e |
| GLP-1C 5mg + GLP-1S 5mg | Cagrilintide: 5mg → 4.84mg Under label -3.2% Semaglutide: 5mg → 4.46mg Underfilled -10.8% | Not read | Not itemised | janoshik | Open certificate GLP-1C 5mg + GLP-1S 5mg |
| GLP-3 R 15mg | 15mg → 16.91mg Overfilled +12.7% | 99.588% | 0.41% not itemised | janoshik | Open certificate GLP-3 R 15mg |
| GLP-3 R 20mg | 20mg → 22.22mg Overfilled +11.1% | 99.718% | 0.28% not itemised | janoshik | Open certificate GLP-3 R 20mg |
| GLP-3 R 30mg | 30mg → 33.9mg Overfilled +13.0% | 99.823% | 0.18% not itemised | janoshik | Open certificate GLP-3 R 30mg |
| GLP-3 R 40mg | 40mg → 45.34mg Overfilled +13.4% | 99.687% | 0.31% not itemised | janoshik | Open certificate GLP-3 R 40mg |
| GLP-3 R 5mg | 5mg → 6.05mg Overfilled +21.0% | 99.072% | 0.93% not itemised | janoshik | Open certificate GLP-3 R 5mg |
| GLP-3 R 60mg | 60mg → 68.1mg Overfilled +13.5% | 99.767% | 0.23% not itemised | janoshik | Open certificate GLP-3 R 60mg |
| IPAMORELIN 10mg | 10mg → 8.61mg Underfilled -13.9% | 99.626% | 0.37% not itemised | janoshik | Open certificate IPAMORELIN 10mg |
| KISSPEPTIN-10 5mg | 5mg → 5.9mg Overfilled +18.0% | 99.449% | 0.55% not itemised | janoshik | Open certificate KISSPEPTIN-10 5mg |
| SEMAX 5mg e | 5mg → 5.78mg Overfilled +15.6% | 99.471% | 0.53% not itemised | janoshik | Open certificate SEMAX 5mg e |
| TB 500 10mg | 10mg → 11.4mg Overfilled +14.0% | 99.861% | 0.14% not itemised | janoshik | Open certificate TB 500 10mg |
| AOD9604 5mg e | 5mg → 4.61mg Under label -7.8% | 99.723% | 0.28% not itemised | janoshik | Open certificate AOD9604 5mg e |
| BPC 157 5mg e | 5mg → 5.37mg Over label +7.4% | 99.865% | 0.14% not itemised | janoshik | Open certificate BPC 157 5mg e |
| CJC-1295 5mg e | 5mg → 5.28mg Over label +5.6% | 99.133% | 0.87% not itemised | janoshik | Open certificate CJC-1295 5mg e |
| GHK-CU 50mg | 50mg → 46.57mg Under label -6.9% | 99.607% | 0.39% not itemised | janoshik | Open certificate GHK-CU 50mg |
| GLP-1 S 10mg e | 10mg → 10.48mg Over label +4.8% | 99.892% | 0.11% not itemised | janoshik | Open certificate GLP-1 S 10mg e |
| GLP-1 T 10mg | 10mg → 9.12mg Under label -8.8% | 99.68% | 0.32% not itemised | janoshik | Open certificate GLP-1 T 10mg |
| GLP-1 T 15mg e | 15mg → 16.43mg Over label +9.5% | 99.86% | 0.14% not itemised | janoshik | Open certificate GLP-1 T 15mg e |
| GLP-1 T 20mg e | 20mg → 21.46mg Over label +7.3% | 99.83% | 0.17% not itemised | janoshik | Open certificate GLP-1 T 20mg e |
| GLP-1 T 40mg e | 40mg → 43.77mg Over label +9.4% | 99.872% | 0.13% not itemised | janoshik | Open certificate GLP-1 T 40mg e |
| GLP-1 T 5mg e | 5mg → 5.37mg Over label +7.4% | 99.627% | 0.37% not itemised | janoshik | Open certificate GLP-1 T 5mg e |
| GLP-3 R 10mg | 10mg → 10.96mg Over label +9.6% | 99.281% | 0.72% not itemised | janoshik | Open certificate GLP-3 R 10mg |
| GLP-3 R 50mg | 50mg → 54.76mg Over label +9.5% | 99.463% | 0.54% not itemised | janoshik | Open certificate GLP-3 R 50mg |
| IPAMORELIN 5mg | 5mg → 4.69mg Under label -6.2% | 99.853% | 0.15% not itemised | janoshik | Open certificate IPAMORELIN 5mg |
| MOTS-C 10mg e | 10mg → 10.61mg Over label +6.1% | 99.837% | 0.16% not itemised | janoshik | Open certificate MOTS-C 10mg e |
| MT-2 (MELANOTAN 2) 10mg | 10mg → 10.92mg Over label +9.2% | 99.503% | 0.50% not itemised | janoshik | Open certificate MT-2 (MELANOTAN 2) 10mg |
| SEMAX 10mg e | 10mg → 10.5mg Over label +5.0% | 99.356% | 0.64% not itemised | janoshik | Open certificate SEMAX 10mg e |
| SERMORELIN 10mg | 10mg → 10.46mg Over label +4.6% | 94.505% | 5.50% not itemised | janoshik | Open certificate SERMORELIN 10mg |
| TB 500 5mg e | 5mg → 5.27mg Over label +5.4% | 99.565% | 0.44% not itemised | janoshik | Open certificate TB 500 5mg e |
| TESAMORELIN 10mg | 10mg → 9.32mg Under label -6.8% | 99.132% | 0.87% not itemised | janoshik | Open certificate TESAMORELIN 10mg |
| TESAMORELIN 5mg | 5mg → 5.32mg Over label +6.4% | 99.505% | 0.50% not itemised | janoshik | Open certificate TESAMORELIN 5mg |
| ARA-290 10mg e | 10mg → 10.17mg On label +1.7% | 99.704% | 0.30% not itemised | janoshik | Open certificate ARA-290 10mg e |
| CJC-1295 NO-DAC 5mg | 5mg → 14.32mg Not checked | 99.774% | 0.23% not itemised | janoshik | Open certificate CJC-1295 NO-DAC 5mg |
| GLP-1 S 30mg e | 30mg → 30mg On label 0.0% | 99.657% | 0.34% not itemised | janoshik | Open certificate GLP-1 S 30mg e |
| HGH 191AA 15iu | — → 4.9mg Not checked | 95.016% | 4.98% not itemised | janoshik | Open certificate HGH 191AA 15iu |
| HGH 191AA 36iu | — → 13.71mg Not checked | 96.327% | 3.67% not itemised | janoshik | Open certificate HGH 191AA 36iu |
| KISSPEPTIN-10 10mg | 10mg → 9.88mg On label -1.2% | 99.013% | 0.99% not itemised | janoshik | Open certificate KISSPEPTIN-10 10mg |
| MOTS-C 40mg e | 40mg → 40.78mg On label +2.0% | 99.544% | 0.46% not itemised | janoshik | Open certificate MOTS-C 40mg e |
| NAD+ 100mg e | 100mg → 161.83mg Not checked | Not read | Not itemised | janoshik | Open certificate NAD+ 100mg e |
| OXYTOCIN ACETATE 2mg | 2mg → 1.99mg On label -0.5% | 96.36% | 3.64% not itemised | janoshik | Open certificate OXYTOCIN ACETATE 2mg |
| Selank 10mg e | 10mg → 10.29mg On label +2.9% | 99.711% | 0.29% not itemised | janoshik | Open certificate Selank 10mg e |
| Selank 5mg e | 5mg → 4.99mg On label -0.2% | 99.642% | 0.36% not itemised | janoshik | Open certificate Selank 5mg e |
| VIP 10mg e | 10mg → 9.89mg On label -1.1% | 99.422% | 0.58% not itemised | janoshik | Open certificate VIP 10mg e |
Penguin Peptides FAQ
Is Penguin Peptides legit?
We score Penguin Peptides 21 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.
Does Penguin Peptides publish lab reports (COAs)?
Yes. We hold 54 certificates from their website. They cover 3 of the 11 peptides we track. Labs named on them: Janoshik. We found 44 of them on the lab's own website. A certificate is the shop's own document, not our test.
How much does Penguin Peptides charge?
On 7 Nov 2026 we tracked 11 prices from $40 to $76. The cheapest is SNAP-8 at $40. The full list is in the price table above.
Has Peptide Scanner tested Penguin Peptides?
Not yet. Lab results are worth 40 points, and those stay locked until we test one of their products at an independent lab.
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