PSR / SUPPLIER COMPARISON
Compare Supplier Transparency
Select up to three suppliers to compare PSR’s preliminary transparency scores, documentation signals, locations, review dates, and verified promotions side by side.
PSR TRANSPARENCY LEADERBOARD (HIGHEST SCORE FIRST)
| Supplier | Overall PSR Score | Public COA Access | Testing Evidence | Lot Traceability | Pricing Transparency | Region | Confirmed Promo | Read Report | Visit Supplier |
|---|---|---|---|---|---|---|---|---|---|
| CertaPeptides | 95 / 100 | Public quality archive | 90 / 100 (Excellent) | 97 / 100 (Excellent) | 95 / 100 (Excellent) | Bucharest, Romania | 15% off — code PSRSAVE15 | Read Report | Visit Supplier |
| PSPeptides | 95 / 100 | Public certification library with batch-linked reports | 98 / 100 (Excellent) | 98 / 100 (Excellent) | 96 / 100 (Excellent) | New Jersey, USA (supplier-stated) | 10% off — code PSRSAVE10 | Read Report | Visit Supplier |
| American Peptides | 94 / 100 | Public lot-number COA lookup | 92 / 100 (Excellent) | 98 / 100 (Excellent) | 98 / 100 (Excellent) | Shreveport, Louisiana, USA | 15% off — code PSRPEPTIDES | Read Report | Visit Supplier |
| Sparta Labs | 93 / 100 | Public Lab Results page | 90 / 100 (Excellent) | 97 / 100 (Excellent) | 96 / 100 (Excellent) | Mount Pleasant, South Carolina, USA | 15% off — code PSRSAVE15 | Read Report | Visit Supplier |
| Omni Peptides | 92 / 100 | Batch-specific third-party COAs | 96 / 100 (Excellent) | 95 / 100 (Excellent) | 96 / 100 (Excellent) | USA | 10% off — code OMNI10 | Read Report | Visit Supplier |
| Apollo Peptide Sciences | 91 / 100 | Product-linked third-party report | 92 / 100 (Excellent) | 91 / 100 (Excellent) | 95 / 100 (Excellent) | Oxnard, California, USA | Read Report | Visit Supplier | |
| Peptides Kingdom | 90 / 100 | Public COA archive | 93 / 100 (Excellent) | 90 / 100 (Excellent) | 94 / 100 (Excellent) | USA | 15% off — code PSRSAVE15 | Read Report | Visit Supplier |
| Baltic Peptides | 89 / 100 | Public COA archive | 88 / 100 (Strong) | 94 / 100 (Excellent) | 94 / 100 (Excellent) | Lithuania, European Union | 10% off — code peptidesupplyreport10 | Read Report | Visit Supplier |
| Evolve Peptides | 88 / 100 | Public batch-number lookup | 88 / 100 (Strong) | 91 / 100 (Excellent) | 95 / 100 (Excellent) | USA | 15% off — code PSR15 | Read Report | Visit Supplier |
| Offline Peptides | 87 / 100 | Searchable COA library | 90 / 100 (Excellent) | 93 / 100 (Excellent) | 70 / 100 (Limited) | Dallas, TX USA | Read Report | Visit Supplier | |
| True Peptides | 87 / 100 | Public COA database | 84 / 100 (Moderate) | 92 / 100 (Excellent) | 92 / 100 (Excellent) | USA | 10% off — code peptidesupply | Read Report | Visit Supplier |
| 99 Purity Peptides | 87 / 100 | Public COA library | 88 / 100 (Strong) | 90 / 100 (Excellent) | 95 / 100 (Excellent) | USA | 10% off — code PEPTIDESUPPLYRE | Read Report | Visit Supplier |
| Amino Science Labs | 86 / 100 | Public COA library | 86 / 100 (Strong) | 84 / 100 (Moderate) | 92 / 100 (Excellent) | Florida, USA | 20% off — code AMINO20 | Read Report | Visit Supplier |
| Aero Peptides | 83 / 100 | COAs by request; archive pending | 80 / 100 (Moderate) | 86 / 100 (Strong) | 96 / 100 (Excellent) | USA | 10% off — code 10OFF | Read Report | Visit Supplier |
| Woosh Labs | 83 / 100 | Batch COAs by request; public posting inconsistent | 82 / 100 (Moderate) | 78 / 100 (Moderate) | 96 / 100 (Excellent) | United States (supplier-stated) | 10% off — code tony17 | Read Report | Visit Supplier |
Amino Science Labs
86
Offline Peptides
87
True Peptides
87
OVERALL PSR SCORE
86 / 100
87 / 100
87 / 100
CLASSIFICATION
Strong Transparency
Strong Transparency
Strong Transparency
LOCATION
Florida, USA
Dallas, TX USA
USA
LAST REVIEWED
August 2026
September 2026
September 2026
DOCUMENTATION QUALITY
88 / 100
92 / 100
90 / 100
TESTING EVIDENCE
86 / 100
90 / 100
84 / 100
LOT TRACEABILITY
84 / 100
93 / 100
92 / 100
PRICING TRANSPARENCY
92 / 100
70 / 100
92 / 100
SUPPLIER TRANSPARENCY
76 / 100
82 / 100
74 / 100
VERIFIED PROMOTION
20% off — code AMINO20
No verified customer promo code
10% off — code peptidesupply
HOW TO READ THIS COMPARISON
Scores evaluate the availability, clarity, and traceability of supplier information. They are preliminary, evidence-limited research assessments—not certifications or determinations of product safety, efficacy, regulatory status, or suitability for human use.
AFFILIATE DISCLOSURE
PSR may receive compensation from certain supplier referral links. Affiliate relationships do not determine PSR scores, methodology, findings, or editorial conclusions.