Capstone Peptides
Is Capstone Peptides legit? What the records show
We have tracked Capstone Peptides since Sep 2026 and follow 14 of their products, covering 13 peptides. Prices run from $45.00 to $84.00. On their own certificates, 21 of 22 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 79% of the 894 shops we score
Max 60 until we lab-test them.
The shaded part is the shops Capstone Peptides scores higher than.
Our lab testLocked / 40Not tested yet
We have not sent a Capstone Peptides product to an independent lab yet, so these 40 points are locked. The lab report will go on this page when we do.
Reviews4 / 20Low rating, few reviews
External review sites: ★ 3.6 ± 0.1 average, from under 50 reviews. We show a range because sites round their ratings differently.
That gives 4 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.
Certificates17.4 / 2513 of 13 peptides covered
Publishing: 13 of 15. We hold 26 lab certificates from their website, naming Accumark Labs. We found 0 of the 26 on the issuing lab's own website (not every lab has a public lookup). 13 of the 13 peptides we track have a matching certificate from an independent lab (any size counts). 3 of the 26 certificates include a contamination test (endotoxin, sterility or heavy metals). 21 of 21 dated certificates were issued in the last 6 months. Newest: Jul 2026 (3 months old).
Claims match: 4.4 of 10. Their own certificates against their claims: 1 of 22 measured vials are within 3% of the label (19 overfilled, 2 underfilled); 0 of 26 certificates fall below 98% purity.
Their claims against their certificates: 21 of 22 measured vials off label.
A certificate is the shop's own document. It is not our test.
Capstone Peptides reviews
No reviews on Peptide Scanner yet.
Bought from Capstone Peptides?
Write a reviewCapstone Peptides prices
Checked 7 Nov 2026
Show all 14 prices ↓Showing all 14 prices
Ships to: United States
Their certificates vs their claims
No site-wide purity promise found on their website. Vial content is still checked against the label.
- certificates read
- 26
- vials outside ±3% of label
- 21 / 22
- beyond ±10% (major)
- 14
- 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 |
|---|---|---|---|---|---|
| AOD-9604 | 5mg → 5.91mg Overfilled +18.2% | 99.727% | 0.27% not itemised | Unknown | Open certificate AOD-9604 |
| BPC-157 | 10mg → 11.13mg Overfilled +11.3% | 98.2% | 1.80% not itemised | Unknown | Open certificate BPC-157 |
| BPC-157 | 5mg → 6.05mg Overfilled +21.0% | 98.59% | 1.41% not itemised | Unknown | Open certificate BPC-157 |
| Epitalon | 10mg → 11.52mg Overfilled +15.2% | 99.44% | 0.56% not itemised | Unknown | Open certificate Epitalon |
| Ipamorelin | 5mg → 5.97mg Overfilled +19.4% | 99.453% | 0.55% not itemised | Unknown | Open certificate Ipamorelin |
| MOTS-c | 10mg → 11.45mg Overfilled +14.5% | 99.84% | 0.16% not itemised | Unknown | Open certificate MOTS-c |
| Melanotan II | 10mg → 8.9mg Underfilled -11.0% | 99.075% | 0.92% not itemised | Unknown | Open certificate Melanotan II |
| PT-141 | 10mg → 11.04mg Overfilled +10.4% | 99.92% | 0.08% not itemised | Unknown | Open certificate PT-141 |
Show all 26 certificates read ↓Showing all 26 certificates read
| Product | Label to measured | Purity | Main impurity | Lab | Certificate |
|---|---|---|---|---|---|
| Selank | 5mg → 7.88mg Overfilled +57.6% | 99.81% | 0.19% not itemised | Unknown | Open certificate Selank |
| Semaglutide | 10mg → 11.96mg Overfilled +19.6% | 99.57% | 0.43% not itemised | Unknown | Open certificate Semaglutide |
| Semaglutide | 5mg → 6.14mg Overfilled +22.8% | 99.56% | 0.44% not itemised | Unknown | Open certificate Semaglutide |
| Semax | 30mg → 33.45mg Overfilled +11.5% | 99.57% | 0.43% not itemised | Unknown | Open certificate Semax |
| Sermorelin | 5mg → 5.8mg Overfilled +16.0% | 99.08% | 0.92% not itemised | Unknown | Open certificate Sermorelin |
| Tirzepatide | 10mg → 12.49mg Overfilled +24.9% | 99.75% | 0.25% not itemised | Unknown | Open certificate Tirzepatide |
| Cagrilintide, Semaglutide | 10mg → 10.76mg Over label +7.6% | 99.38% | 0.62% not itemised | Unknown | Open certificate Cagrilintide, Semaglutide |
| Retatrutide | 10mg → 10.37mg Over label +3.7% | 99.9% | 0.10% not itemised | Unknown | Open certificate Retatrutide |
| Retatrutide | 30mg → 30.97mg Over label +3.2% | 99.52% | 0.48% not itemised | Unknown | Open certificate Retatrutide |
| Tesamorelin | 10mg → 10.59mg Over label +5.9% | 99.36% | 0.64% not itemised | Unknown | Open certificate Tesamorelin |
| Thymosin Alpha-1 | 10mg → 10.52mg Over label +5.2% | 99.18% | 0.82% not itemised | Unknown | Open certificate Thymosin Alpha-1 |
| Thymosin Beta-4 | 10mg → 9.66mg Under label -3.4% | 99.1% | 0.90% not itemised | Unknown | Open certificate Thymosin Beta-4 |
| Tirzepatide | 30mg → 32.25mg Over label +7.5% | 99.81% | 0.19% not itemised | Unknown | Open certificate Tirzepatide |
| BPC-157, TB-500 | Blend, per-component content not listed | 98.63% | 1.37% not itemised | Unknown | Open certificate BPC-157, TB-500 |
| BPC-157, TB-500 | Blend, per-component content not listed | 98.62% | 1.38% not itemised | Unknown | Open certificate BPC-157, TB-500 |
| CJC-1295 (no DAC), Ipamorelin | Blend, per-component content not listed | 99.08% | 0.92% not itemised | Unknown | Open certificate CJC-1295 (no DAC), Ipamorelin |
| GHK-Cu, BPC-157, TB-500 | Blend, per-component content not listed | 99.61% | 0.39% not itemised | Unknown | Open certificate GHK-Cu, BPC-157, TB-500 |
| NAD+ | 500mg → 508.97mg On label +1.8% | 99.68% | 0.32% not itemised | Unknown | Open certificate NAD+ |
Capstone Peptides FAQ
Is Capstone Peptides legit?
We score Capstone Peptides 23 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 Capstone Peptides publish lab reports (COAs)?
Yes. We hold 26 certificates from their website. They cover 13 of the 13 peptides we track. Labs named on them: Accumark Labs. We could not find any of them on the lab's own website. A certificate is the shop's own document, not our test.
How much does Capstone Peptides charge?
On 7 Nov 2026 we tracked 14 prices from $45 to $84. The cheapest is BPC-157 at $45. The full list is in the price table above.
Where does Capstone Peptides ship?
They ship to United States.
Has Peptide Scanner tested Capstone Peptides?
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