PSR SUPPLIER REPORT
Peptides Kingdom
Independent review of Peptides Kingdom supplier-stated documentation, batch-level COAs, analytical testing claims, lot traceability, pricing visibility, and transparency.
REPORT STATUS
Initial Review
LAST REVIEWED
September 2026
SUPPLIER TYPE
Research-use supplier
LOCATION LISTED
United States (supplier-stated)
AFFILIATE DISCLOSURE
PSR may receive compensation from certain supplier referral links. Affiliate relationships do not determine PSR scores, methodology, findings, or editorial conclusions.
Shop Peptides Kingdom
PSR Reader Offer — 15% OFF with code PSRSAVE15
PRELIMINARY PSR ASSESSMENT
90 / 100 · EXCELLENT TRANSPARENCY
WEIGHTED OVERALL PSR TRANSPARENCY SCORE
90 / 100
Preliminary assessment pending continued documentation review. Scores reflect transparency evidence and are not a certification, guarantee, safety determination, or human-use recommendation.
DOCUMENTATION QUALITY · 25%
92 / 100
TESTING EVIDENCE · 25%
93 / 100
LOT TRACEABILITY · 20%
90 / 100
PRICING TRANSPARENCY · 15%
94 / 100
SUPPLIER TRANSPARENCY · 15%
76 / 100
EXECUTIVE SUMMARY
Supplier-stated batch-level COAs, third-party testing, and HPLC plus mass-spectrometry documentation.
Peptides Kingdom offers research-use peptides advertised at 99%+ purity with third-party testing, batch-level Certificates of Analysis, and HPLC and mass spectrometry documentation. Products ship from the USA. Peptide Supply Report users can save 15% with code PSRSAVE15. Products are strictly for laboratory research use only and are not intended for human or veterinary use. Supplier testing, purity, USA shipping origin, and facility statements are treated as supplier-stated unless documentation is directly observed.
01 / DOCUMENTATION REVIEW
Documentation Quality
OBSERVED PUBLIC DOCUMENTATION
Supplier-stated 99%+ purity · Third-party testing claim · Batch-level COAs · HPLC and mass spectrometry documentation · USA shipping origin · Free shipping at $150+ · Research-use restrictions
OPEN QUESTIONS
Complete catalog-wide COA coverage · Laboratory accreditation · Public legal entity · Ownership disclosure · Street address · Full chain-of-custody documentation
PSR OBSERVATION
Peptides Kingdom states that it provides batch-level COAs, third-party testing, and HPLC plus mass spectrometry documentation. These supplier statements are evidence-limited pending direct document review, and PSR limits conclusions to documentation actually inspected.
02 / TESTING EVIDENCE
Peptides Kingdom states that its research-use peptides are third-party tested and supported by batch-level COAs with HPLC and mass spectrometry documentation. PSR has not independently verified laboratory accreditation, chain of custody, raw analytical files, ISO certification, or complete catalog-wide coverage.
Batch-level COAs — Supplier-stated · Third-party testing — Supplier-stated · Methods — HPLC and mass spectrometry documentation stated · Batch linkage — Supplier-stated · ISO 9001:2015 facility statement — Not independently verified · Catalog-wide coverage — Not established · Accreditation — Not independently verified
PSR NOTE
Peptides Kingdom states that batch-level COAs, HPLC, and mass spectrometry documentation are available. Until documentation is directly inspected, these claims remain supplier-stated and do not establish complete catalog-wide coverage.
SUPPLIER-STATED
Claims made by Peptides Kingdom that PSR has not independently substantiated beyond supplier-provided information.
DOCUMENT OBSERVED
Information directly displayed in the reviewed laboratory certificates or public supplier documentation.
PSR CONCLUSION
A preliminary interpretation limited to the available public evidence and subject to continued documentation review.
03 / SAMPLE COA OBSERVATIONS
PUBLIC COA STATUS / OBSERVED
Batch-specific reports inspected
Peptides Kingdom states that batch-level COAs and HPLC plus mass spectrometry documentation are available. This preliminary report does not treat those claims as independently verified without direct document review.
REVIEWED EXAMPLES / DOCUMENT OBSERVED
Supplier-stated 99%+ purity
Peptides Kingdom advertises 99%+ purity. This is supplier-stated and should not be generalized to every product or batch without direct, batch-specific documentation review.
These observations apply only to the specific submitted samples represented by the reviewed certificates and should not be generalized to every supplier product or batch.
04 / LOT TRACEABILITY
Lot Traceability
Peptides Kingdom states that it provides batch-level COAs. Lot traceability is scored provisionally based on the stated availability of batch-linked documentation and remains evidence-limited pending direct review.
05 / PRICING VISIBILITY
Pricing Visibility
Peptides Kingdom lists research-use products and supplier-stated shipping terms, including free shipping on orders of $150+. PSR users can save 15% with code PSRSAVE15. Pricing transparency is assessed preliminarily and remains subject to continued review.
PSR OBSERVATION — Peptides Kingdom offers a 15% reader discount with code PSRSAVE15. Pricing and promotion details are presented as preliminary and subject to continued verification.
06 / COMPANY & SUPPLIER TRANSPARENCY
Listed shipping origin — USA (supplier-stated) · Free shipping $150+ — Supplier-stated · Research-use restrictions — Stated · ISO 9001:2015 facility statement — Not independently verified · Legal entity, street address, and ownership — Not independently verified · Laboratory accreditation — Not independently verified
PSR OBSERVATION — Peptides Kingdom provides supplier-stated product, testing, shipping, and research-use information. PSR did not independently verify facility certification, purity, USA shipping origin, legal entity, ownership, laboratory accreditation, or complete catalog-wide testing coverage.
ITEMS REQUIRING CONTEXT
Peptides Kingdom states that products ship from the USA, are third-party tested, and are produced in an ISO 9001:2015 certified facility. PSR has not independently verified those statements, manufacturing practices, ownership, laboratory accreditation, chain of custody, or complete catalog-wide testing coverage.
07 / EVIDENCE CLASSIFICATION
OBSERVED IN PUBLIC DOCUMENTATION — Information directly displayed in reviewed public materials. SUPPLIER-STATED — Claims made by Peptides Kingdom that PSR has not independently substantiated. NOT DETERMINED — Information for which PSR does not currently have sufficient evidence.
08 / BALANCED ASSESSMENT
DOCUMENTATION STRENGTHS
Supplier-stated batch-level COAs · Third-party testing claim · HPLC and mass spectrometry documentation · Supplier-stated USA shipping origin · Free shipping threshold · Research-use-only restrictions
AREAS FOR FURTHER REVIEW
Direct review of batch-level COAs · Independent confirmation of third-party testing · ISO 9001:2015 facility documentation · Laboratory accreditation · Raw analytical data · Complete catalog-wide testing coverage · Full chain-of-custody verification
PSR ASSESSMENT
Preliminary PSR Transparency Score: 90 / 100 — Excellent Transparency
Peptides Kingdom receives a preliminary 90/100 transparency score based on supplier-stated 99%+ purity, third-party testing, batch-level COAs, HPLC and mass spectrometry documentation, USA shipping, and clear reader promotion details. The score is evidence-limited and does not independently verify ISO certification, purity, testing, facility statements, or catalog-wide coverage. This is not a certification, safety determination, or product-quality guarantee.
Shop Peptides Kingdom
PSR Reader Offer — 15% OFF with code PSRSAVE15
09 / SOURCES REVIEWED
Peptides Kingdom homepage · Product pages · Supplier testing and COA claims · Shipping information · Promotion details · Terms and research-use restrictions
DISCLAIMER
PSR evaluates supplier transparency and publicly available documentation for informational and research purposes. A PSR score is not a certification, laboratory guarantee, medical recommendation, safety determination, regulatory approval, or guarantee of product identity, purity, efficacy, legality, or suitability for human or animal use.
United States (supplier-stated)
PSR Reader Offer — 15% OFF with code PSRSAVE15
90 / 100
Independent review of Peptides Kingdom supplier-stated documentation, batch-level COAs, analytical testing claims, lot traceability, pricing visibility, and transparency.
Shop Peptides Kingdom
Shop Peptides Kingdom
Shop Peptides Kingdom
PSR Reader Offer — 15% OFF with code PSRSAVE15
PSR Reader Offer — 15% OFF with code PSRSAVE15
PSR Reader Offer — 15% OFF with code PSRSAVE15
90 / 100 · EXCELLENT TRANSPARENCY
90 / 100 · EXCELLENT TRANSPARENCY
90 / 100 · EXCELLENT TRANSPARENCY
90 / 100
90 / 100
90 / 100
92 / 100
92 / 100
92 / 100
93 / 100
93 / 100
93 / 100
90 / 100
90 / 100
90 / 100
76 / 100
76 / 100
76 / 100
Supplier-stated batch-level COAs, third-party testing, and HPLC plus mass-spectrometry documentation.
Supplier-stated batch-level COAs, third-party testing, and HPLC plus mass-spectrometry documentation.
Supplier-stated batch-level COAs, third-party testing, and HPLC plus mass-spectrometry documentation.
Peptides Kingdom offers research-use peptides advertised at 99%+ purity with third-party testing, batch-level Certificates of Analysis, and HPLC and mass spectrometry documentation. Products ship from the USA. Peptide Supply Report users can save 15% with code PSRSAVE15. Products are strictly for laboratory research use only and are not intended for human or veterinary use. Supplier testing, purity, USA shipping origin, and facility statements are treated as supplier-stated unless documentation is directly observed.
Peptides Kingdom offers research-use peptides advertised at 99%+ purity with third-party testing, batch-level Certificates of Analysis, and HPLC and mass spectrometry documentation. Products ship from the USA. Peptide Supply Report users can save 15% with code PSRSAVE15. Products are strictly for laboratory research use only and are not intended for human or veterinary use. Supplier testing, purity, USA shipping origin, and facility statements are treated as supplier-stated unless documentation is directly observed.
Peptides Kingdom offers research-use peptides advertised at 99%+ purity with third-party testing, batch-level Certificates of Analysis, and HPLC and mass spectrometry documentation. Products ship from the USA. Peptide Supply Report users can save 15% with code PSRSAVE15. Products are strictly for laboratory research use only and are not intended for human or veterinary use. Supplier testing, purity, USA shipping origin, and facility statements are treated as supplier-stated unless documentation is directly observed.
Supplier-stated 99%+ purity · Third-party testing claim · Batch-level COAs · HPLC and mass spectrometry documentation · USA shipping origin · Free shipping at $150+ · Research-use restrictions
Supplier-stated 99%+ purity · Third-party testing claim · Batch-level COAs · HPLC and mass spectrometry documentation · USA shipping origin · Free shipping at $150+ · Research-use restrictions
Supplier-stated 99%+ purity · Third-party testing claim · Batch-level COAs · HPLC and mass spectrometry documentation · USA shipping origin · Free shipping at $150+ · Research-use restrictions
Complete catalog-wide COA coverage · Laboratory accreditation · Public legal entity · Ownership disclosure · Street address · Full chain-of-custody documentation
Complete catalog-wide COA coverage · Laboratory accreditation · Public legal entity · Ownership disclosure · Street address · Full chain-of-custody documentation
Complete catalog-wide COA coverage · Laboratory accreditation · Public legal entity · Ownership disclosure · Street address · Full chain-of-custody documentation
Peptides Kingdom states that it provides batch-level COAs, third-party testing, and HPLC plus mass spectrometry documentation. These supplier statements are evidence-limited pending direct document review, and PSR limits conclusions to documentation actually inspected.
Peptides Kingdom states that it provides batch-level COAs, third-party testing, and HPLC plus mass spectrometry documentation. These supplier statements are evidence-limited pending direct document review, and PSR limits conclusions to documentation actually inspected.
Peptides Kingdom states that it provides batch-level COAs, third-party testing, and HPLC plus mass spectrometry documentation. These supplier statements are evidence-limited pending direct document review, and PSR limits conclusions to documentation actually inspected.