Blank Peptides is the more transparent of the two on our method (7.8 vs 7.0). It names its labs on every certificate, ties each one to a lot printed on the vial, adds an endotoxin report per current lot and gives no dosing guidance. PSPeptides has the longer public track record (4.2/5 on Trustpilot), takes almost every payment method and is cheaper, but its blog publishes human dosing guides. Our code CHECKED gives 10% off at both. PSPeptides is #3 and Blank Peptides #4 in our editors' order, which isn't sorted by score.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice. This comparison covers supplier transparency only, based on public documentation. We didn't purchase or test products, and we don't repeat dosing content.
Side-by-side
| Blank Peptides | PSPeptides | |
|---|---|---|
| Transparency score (method) | 7.8 | 7.0 |
| Overall score | 7.8 | 8.5 |
| Entity and address | No entity; Sheridan, WY mailing address | New Jersey; no legal entity on site |
| Business-age claim vs domain | "Since 2021" vs March 2026 domain | "5+ years" vs November 2025 domain |
| Lab named | Horizon Analytical, Freedom Diagnostics, on site and certificates | Not on site; North American Diagnostics on PDFs |
| Lot-level COAs | Yes, lot on vial, lookup page | Dated by month, batch on PDF |
| Endotoxin | Separate report per current lot | Mentioned on certifications page |
| Dosing content | None; says it gives no dosing guidance | Blog publishes dosing guides |
| Finnrick | No profile | Profile, 0 tests |
| Trustpilot | Profile removed by Trustpilot | 4.2/5 from 175 reviews |
| Payment | Cards, wire, crypto | Cards, Apple/Google/Shop Pay, Cash App, Zelle, Afterpay, Klarna |
| Coupon code | CHECKED, 10% off entire order | CHECKED, 10% off |
COAs and labs
Blank Peptides names Horizon Analytical and Freedom Diagnostics on its site and its certificates. The BPC-157 report we opened (lot DPS-4605515) showed 99.4% purity, 9.82 mg in a 10 mg vial and a report number searchable on the lab's site, with a matching endotoxin report under 0.05 EU/mL (review).
PSPeptides says only "independent, accredited laboratories" on its site. The certificate we opened named North American Diagnostics, with no accreditation or verification key listed (review).
Labeling: the biggest difference
This is where the two are furthest apart. Blank Peptides' brand-facts page says it gives no dosing, reconstitution-for-use or protocol guidance for any living subject, and its blog covers lab topics. PSPeptides' blog publishes human dosing guides, including a week-by-week retatrutide chart, and its shop uses bundle names such as "Shred Express." FDA has said a research-use label doesn't protect a seller whose content points to human use (background).
Business history
Both make age claims their domains don't support: Blank says "in business since 2021" with a domain from March 2026, and PSPeptides says "over 5 years" with a domain from November 2025. Neither publishes a legal entity. PSPeptides has the longer public review record.
Price check
| Item | Blank Peptides (Oct 12, 2026) | PSPeptides (when checked) |
|---|---|---|
| Retatrutide 10 mg | $115.00 | $69.99 |
| BPC-157 | $65.00 (10 mg) | $49.99-$89.99 by size |
PSPeptides is cheaper per vial. With CHECKED, Blank's retatrutide 10 mg is $103.50 and its BPC-157 10 mg $58.50, before any bulk discount.
Which should you choose?
- Choose Blank Peptides for named-lab, lot-matched certificates with endotoxin results and strictly research-only content. Code CHECKED. Visit Blank Peptides.
- Choose PSPeptides for lower prices, more payment options and a longer review history, knowing its content conflicts with research-use labeling. Code CHECKED. Visit PSPeptides.
Related
- Reviews: Blank Peptides, PSPeptides
- More comparisons: Blank Peptides vs NextGenPeps, NextGenPeps vs PSPeptides
- Peptide coupon codes · best retatrutide vendors