PeptideScanner
Find a supplier
Peptide Scanner does not sell peptides. Independent, not affiliated with any supplier. Disclaimer

Extreme Peptide

★ 4.3 ± 0.1 · 100–500 external reviews
$29–390
14 prices
21 / 60
Peptide Scanner score · see why ↓Visit website

Is Extreme Peptide legit? What the records show

We have tracked Extreme Peptide since Sep 2026 and follow 14 of their products, covering 7 peptides. Prices run from $29.99 to $389.99.

Check it yourself: find the report number or QR code on a certificate and look it up on the lab's own website.

21 / 60

Higher than 69% of the 894 shops we score

Max 60 until we lab-test them.

Extreme Peptide 21
Typical shop 16Best 35060

The shaded part is the shops Extreme Peptide scores higher than.

Our lab testLocked / 40Not tested yet

We have not sent a Extreme Peptide product to an independent lab yet, so these 40 points are locked. The lab report will go on this page when we do.

Reviews7.6 / 20Good rating, some reviews

External review sites: ★ 4.3 ± 0.1 average, from 100–500 reviews. We show a range because sites round their ratings differently.

That gives 7.6 of 20.

Community3 / 15Serious concerns raised

Forum and Reddit talk raises serious concerns. Nobody has left a review on Peptide Scanner yet.

That gives 3 of 15.

Certificates10 / 25Some checkable lab reports

Publishing: 5 of 15. 34 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: 34 certificates read.

A certificate is the shop's own document. It is not our test.

Tap a row for details. How the score works

Extreme Peptide reviews

No reviews on Peptide Scanner yet.

Bought from Extreme Peptide?

Write a review

Extreme Peptide prices

Checked 7 Nov 2026

Oxytocin2mg$29.99$14.99/mgNone on fileVisit
Selank5mg$29.99$6.00/mgNone on fileVisit
TB-5002mg$39.99$20.00/mgNone on fileVisit
Selank10mg$49.99$5.00/mgNone on fileVisit
TB-5005mg$59.99$12.00/mgNone on fileVisit
Tesamorelin10mg$99.99$10.00/mgNone on fileVisit
AOD-96045mg$99.99$20.00/mgNone on fileVisit
Retatrutide5mg$129.99$26.00/mgNone on fileVisit
Show all 14 prices ↓Showing all 14 prices
Tirzepatide10mg$159.00$15.90/mgNone on fileVisit
Retatrutide10mg$199.99$20.00/mgNone on fileVisit
Tirzepatide30mg$249.00$8.30/mgNone on fileVisit
Retatrutide20mg$299.99$15.00/mgNone on fileVisit
Tirzepatide50mg$349.00$6.98/mgNone on fileVisit
Retatrutide30mg$389.99$13.00/mgNone on fileVisit

Their certificates vs their claims

No site-wide purity promise found on their website. Vial content is still checked against the label.

certificates read
34
vials outside ±3% of label
0 / 0
beyond ±10% (major)
0
site-wide purity claim to check
None
On label, within ±3%Off label, 3 to 10%Major, beyond ±10%
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.
Extreme Peptide certificates: label against measured content and purity
ProductLabel to measuredPurityMain impurityLabCertificate
EXT-MK67-00006_COA.pdfNot measured
99.91%
0.09% not itemisedsr-bioOpen certificate EXT-MK67-00006_COA.pdf
EXT-5AMI-00007_COA.pdfNot measured
99.03%
0.97% not itemisedsr-bioOpen certificate EXT-5AMI-00007_COA.pdf
EXT-CLOM-00001_COA.pdfNot measured
99.37%
0.63% not itemisedsr-bioOpen certificate EXT-CLOM-00001_COA.pdf
EXT-GNRH-00003_COA.pdfNot measured
99.39%
0.61% not itemisedsr-bioOpen certificate EXT-GNRH-00003_COA.pdf
EXT-KETI-00001_COA.pdfNot measured
99.99%
0.01% not itemisedsr-bioOpen certificate EXT-KETI-00001_COA.pdf
EXT-DUTA-00001_COA.pdfNot measured
99.76%
0.24% not itemisedsr-bioOpen certificate EXT-DUTA-00001_COA.pdf
EXT-MK28-00004_COA.pdfNot measured
99.48%
0.52% not itemisedsr-bioOpen certificate EXT-MK28-00004_COA.pdf
PEG-MGF · 2.73mgEXT-MGF-00002_COA.pdfNot measured
99.22%
0.78% not itemisedsr-bioOpen certificate PEG-MGF · 2.73mg
Show all 34 certificates read ↓Showing all 34 certificates read
Extreme Peptide certificates: label against measured content and purity (continued)
ProductLabel to measuredPurityMain impurityLabCertificate
EXT-MAZD-00002_COA.pdfNot measured
99.7%
0.30% not itemisedsr-bioOpen certificate EXT-MAZD-00002_COA.pdf
EXT-LGD4-00001_COA.pdfNot measured
99.83%
0.17% not itemisedsr-bioOpen certificate EXT-LGD4-00001_COA.pdf
EXT-LETR-00001_COA.pdfNot measured
99.33%
0.67% not itemisedsr-bioOpen certificate EXT-LETR-00001_COA.pdf
EXT-EXEM-00001_COA.pdfNot measured
99.71%
0.29% not itemisedsr-bioOpen certificate EXT-EXEM-00001_COA.pdf
EXT-CLEN-00001_COA.pdfNot measured
99.48%
0.52% not itemisedsr-bioOpen certificate EXT-CLEN-00001_COA.pdf
EXT-ANAS-00004_COA.pdfNot measured
99.24%
0.76% not itemisedsr-bioOpen certificate EXT-ANAS-00004_COA.pdf
EXT-PINE-00002_COA.pdfNot measured
99.87%
0.13% not itemisedsr-bioOpen certificate EXT-PINE-00002_COA.pdf
bpc-157Not measured
99.32%
0.68% not itemisedsr-bioOpen certificate bpc-157
cagrilintideNot measured
99.96%
0.04% not itemisedsr-bioOpen certificate cagrilintide
cjc-1295Not measured
99.92%
0.08% not itemisedsr-bioOpen certificate cjc-1295
cjc-1295Not measured
99.89%
0.11% not itemisedsr-bioOpen certificate cjc-1295
cjc-1295Not measured
99.68%
0.32% not itemisedsr-bioOpen certificate cjc-1295
epithalonNot measured
99.73%
0.27% not itemisedsr-bioOpen certificate epithalon
ghrp-2Not measured
99.69%
0.31% not itemisedsr-bioOpen certificate ghrp-2
ghrp-6Not measured
99.41%
0.59% not itemisedsr-bioOpen certificate ghrp-6
glutathioneNot measured
99.89%
0.11% not itemisedsr-bioOpen certificate glutathione
hexarelinNot measured
99.91%
0.09% not itemisedsr-bioOpen certificate hexarelin
hgh-fragment-176-191Not measured
99.82%
0.18% not itemisedsr-bioOpen certificate hgh-fragment-176-191
igf-1-lr3Not measured
99.32%
0.68% not itemisedsr-bioOpen certificate igf-1-lr3
ipamorelinNot measured
99.98%
0.02% not itemisedsr-bioOpen certificate ipamorelin
kisspeptinNot measured
99.42%
0.58% not itemisedsr-bioOpen certificate kisspeptin
kpvNot measured
99.21%
0.79% not itemisedsr-bioOpen certificate kpv
ll-37Not measured
99.57%
0.43% not itemisedsr-bioOpen certificate ll-37
melanotan-iiNot measured
99.52%
0.48% not itemisedsr-bioOpen certificate melanotan-ii
mots-cNot measured
99.37%
0.63% not itemisedsr-bioOpen certificate mots-c
nad-plusNot measured
99.79%
0.21% not itemisedsr-bioOpen certificate nad-plus

Extreme Peptide FAQ

Is Extreme Peptide legit?

We score Extreme Peptide 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.

How much does Extreme Peptide charge?

On 7 Nov 2026 we tracked 14 prices from $29.99 to $389.99. The cheapest is Oxytocin at $29.99. The full list is in the price table above.

Has Peptide Scanner tested Extreme Peptide?

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

Is this your shop?