Particle Peptides Review
Slovak research peptide supplier trading since 2014, with a public batch-numbered COA vault that reports measured peptide content in milligrams rather than a bare purity percentage. Testing follows European Pharmacopoeia methodology across purity, identity, endotoxins and microbial contamination.
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Particle Peptides sells its products exclusively for scientific research and development; any other use is prohibited. The authoritative product information and permitted use are those published by Particle Peptides in its own shop, not on this page.
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The Verdict on Particle Peptides
Particle Peptides is a genuinely established company, not a shell set up around the current peptide boom — PARTICLE s.r.o. has been on the Slovak commercial register since August 2014. Its public COA vault is unusually rigorous: reports show measured milligram content with stated uncertainty, not just a purity percentage, tested to European Pharmacopoeia methodology. The open item is reputation evidence: its Trustpilot profile has been removed, which takes away the main third-party signal we use to cross-check vendors elsewhere in this directory.
How Particle Peptides Scores
Each criterion is scored independently out of 10. The star rating is the weighted average of these scores divided by two: lab transparency 30%, COA quality 20%, independent reputation 20%, shipping, catalog and value 10% each. Lab transparency is weighted most heavily, because a purity figure from an unnamed laboratory cannot be independently corroborated.
What We Found
Strengths
- Retatrutide (sold as GLP-3) fully documented. The Liquilabs certificate for batch 2026349 (published 3 September 2026, read in full on 17 October 2026) names the sample Retatrutide 10 mg: 10.14 mg [± 0.05] measured, purity above 99.8%, molecular ion 4731 Da matching retatrutide, endotoxin 0.016 EU/mg and zero microbial counts.
- Verifiable, long-standing legal entity. PARTICLE s.r.o., Kolonáda 4490/18, Lučenec, Slovakia, IČO 47858541, registered with the Okresný súd Banská Bystrica commercial register since 20 August 2014 — confirmed independently against the Slovak business registry.
- Unusually detailed batch documentation. COA PDFs report measured peptide content in milligrams with a stated uncertainty range, in addition to the purity percentage — a level of detail most vendors in this market do not publish.
- Names its testing laboratory (Liquilabs s.r.o., Czechia) and states testing follows European Pharmacopoeia methodology across a wider panel (purity, identity, peptide content, endotoxins, bioburden, heavy metals) than a bare HPLC purity number.
- No ownership overlap between vendor and laboratory in the public registers. PARTICLE s.r.o. is wholly owned and managed by Viktor Mužila (Slovak commercial register). Liquilabs s.r.o. (IČO 22067787, Prague, founded 19 September 2024) is owned and managed by a different person (Czech ARES register). Checked 11 October 2026.
Weaknesses & caveats
- Coded product name. Retatrutide is sold as “GLP-3”. The sequence, CAS number and certificate make the identity clear, but the product title alone does not.
- No third-party review platform available. The Trustpilot profile has been removed. Removal is a platform decision rather than a customer verdict, and Trustpilot has removed profiles of several vendors in this sector, but it still leaves no independently moderated review history to check. The reviews on the vendor's own site are self-hosted and not independently moderated.
- Single laboratory, and a young one. Current certificates come from Liquilabs alone, a company registered in September 2024. The vendor says cross-checks of selected batches at Janoshik Analytical and Uzorak Lab are being arranged; until those reports are published, results rest on one lab.
- Batch numbers are not shown inline on product pages. The batch number is on the COA PDF and in the COA vault, so researchers need to open the certificate to match a vial to it. The vendor has announced a per-batch “QC Passport” on product pages; we will re-check once it is live.
Lab Testing & COA Transparency
The single most useful question about any peptide vendor: can the purity claim be checked by someone other than the vendor?
| Testing lab publicly named | Yes — Liquilabs s.r.o. (Czech Republic) |
|---|---|
| COA practice | Certificates are published as individually downloadable PDFs in a searchable vault, batch-numbered and dated. The reports we pulled report measured peptide content in milligrams with an uncertainty range (e.g. "6.09 mg [± 0.03]"), not just a bare purity percentage — more granular than most vendors in this market publish. Testing is performed by Liquilabs s.r.o. (Michle, Czechia), a named third-party laboratory, and the vendor states its testing panel covers purity, identity, peptide content, endotoxins and microbial contamination (TAMC/TYMC) to European Pharmacopoeia standards. |
| Shipping | Ships from Lučenec, Slovakia (EU) to EU destinations, avoiding customs and import duty for EU-based researchers. |
Third-Party Reputation
Scores recorded on independent review platforms at the date shown. Where platforms disagree sharply, that disagreement is itself the finding.
Claims We Could Not Verify
Particle Peptides makes the following claims about itself. We found no independent corroboration for them. That does not make them false, but they rest on the vendor's word alone.
- Planned cross-laboratory verification with Janoshik Analytical and Uzorak Lab, and planned TFA/counter-ion, water-content and residual-solvent testing. Announced by the vendor in October 2026; no reports published yet.
- Vendor states it is “the only supplier on the market” providing independent verification across all listed testing categories — a self-comparison claim we have not attempted to verify against the rest of the market.
- BiohackTested earns an affiliate commission on orders placed with the code BIOHACKTESTED (confirmed in writing by the vendor's CEO on 18 October 2026). The commission does not affect the scores on this page.
Particle Peptides FAQ
QIs Particle Peptides legit?
Particle Peptides is a genuinely established company, not a shell set up around the current peptide boom — PARTICLE s.r.o. has been on the Slovak commercial register since August 2014. Its public COA vault is unusually rigorous: reports show measured milligram content with stated uncertainty, not just a purity percentage, tested to European Pharmacopoeia methodology. The open item is reputation evidence: its Trustpilot profile has been removed, which takes away the main third-party signal we use to cross-check vendors elsewhere in this directory.
QIs there a Particle Peptides promo code?
Yes. Code BIOHACKTESTED gives 10% OFF at checkout on Particle Peptides. The discount does not change our rating: the score above is based on lab transparency, COA quality and third-party reputation only.
QDoes Particle Peptides provide Certificates of Analysis?
Certificates are published as individually downloadable PDFs in a searchable vault, batch-numbered and dated. The reports we pulled report measured peptide content in milligrams with an uncertainty range (e.g. "6.09 mg [± 0.03]"), not just a bare purity percentage — more granular than most vendors in this market publish. Testing is performed by Liquilabs s.r.o. (Michle, Czechia), a named third-party laboratory, and the vendor states its testing panel covers purity, identity, peptide content, endotoxins and microbial contamination (TAMC/TYMC) to European Pharmacopoeia standards. The testing laboratory is publicly identified as Liquilabs s.r.o. (Czech Republic), which allows the documentation to be traced to a named third party.
QWhat are the main complaints about Particle Peptides?
Coded product name. Retatrutide is sold as “GLP-3”. The sequence, CAS number and certificate make the identity clear, but the product title alone does not. No third-party review platform available. The Trustpilot profile has been removed. Removal is a platform decision rather than a customer verdict, and Trustpilot has removed profiles of several vendors in this sector, but it still leaves no independently moderated review history to check. The reviews on the vendor's own site are self-hosted and not independently moderated. Single laboratory, and a young one. Current certificates come from Liquilabs alone, a company registered in September 2024. The vendor says cross-checks of selected batches at Janoshik Analytical and Uzorak Lab are being arranged; until those reports are published, results rest on one lab. Batch numbers are not shown inline on product pages. The batch number is on the COA PDF and in the COA vault, so researchers need to open the certificate to match a vial to it. The vendor has announced a per-batch “QC Passport” on product pages; we will re-check once it is live.
QWhere does Particle Peptides ship from and how fast?
Ships from Lučenec, Slovakia (EU) to EU destinations, avoiding customs and import duty for EU-based researchers.
QDoes BiohackTested earn commission from Particle Peptides?
BiohackTested earns affiliate commission on some vendor links. Commission does not affect ratings, rankings or editorial assessment, and no vendor sees a review before it is published. Weaknesses are documented for every vendor including those we earn from.
Sources
- Slovak commercial register entry (IČO 47858541)
- Slovak commercial register (ORSR), owners and managing director
- Czech business register (ARES), Liquilabs s.r.o. (IČO 22067787)
- Example batch COA (BPC-157 + TB-500 Mix)
- Independent review noting the removed Trustpilot profile
- Vendor site
Last reviewed: 2026-10-17. Vendor assessments are updated as new lab data and reputation signals appear.
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Independent review: This profile is an editorial directory listing based on public HPLC/COA documentation and community data. We may earn a commission on purchases through affiliate links, which does not affect our objective purity ratings.