Pepsynth Labs gets our 5.5/10 rating (Mixed), with 13 lab reports (COAs) on file. See how scores are calculated →
The four factors average 5.6 by weight, which rounds to 5.5/10.
Direct answer
Pepsynth has a current public catalog, lab-verified report records, and checkout methods observed in this review. Its documentation coverage and vendor transparency are limited.
Testing lab: Prime Analytical Laboratories
Evidence summary
The TB-500 record difference remains unresolved. Match the exact product, strength, lot, and report. A public COA does not prove that a received vial is the tested lot. Code peptideprices gives 10% off.
Pepsynth Labs is a United States research-material storefront. Its domain was registered in October 2025 and uses proxy registration. The public About page does not provide verifiable company details. The site publishes a support email and phone number.
The public catalog lists 33 products. PeptidePrices compares identifiable research compounds at their stated strengths, keeping capsules and unclear blends outside the vial comparison. The October 4 product-page audit recovered 13 distinct public report files. Current linked reports and the separate historical supplied review are retained as different evidence scopes.
The October 4, 2026 product-page audit recovered 13 distinct Prime Analytical Laboratories reports across 16 complete pages. All 13 vendor files match the specific official PDFs returned by their printed QR codes. Twelve reports give HPLC-UV purity; KLOW gives measured component content across four pages. The reports name Pepsynth Labs as contact, were issued March 19–20, 2026, and state the sample lot as Not Provided. The separate historical supplied review covered 19 Prime records with 18 matches to lab records. Report RP214-09Mar26-2 remains unresolved: the supplied copy states TB-500 5 mg, while Prime’s official record states 10 mg and Not TB-500. No corrected Prime-issued record or current inventory lot mapping is retained. That report is absent from the current 13 linked files. Several current product pages link a different compound or strength, including Pinealon to Epithalon, Oxytocin to Semax, GHK-Cu 50 mg to 100 mg, and MOTS-C 10 mg to 20 mg; those links receive no exact product match.
Pepsynth states that it ships to U.S. addresses only and uses USPS or FedEx. It offers free U.S. shipping over $200. Its 30-day money-back guarantee applies to defective vials. Checkout showed Apple Pay and Google Pay. A fulfillment address was not independently verified.
Trustpilot shows 4.4/5 from 13 exact-domain reviews, all currently five stars. Customers describe helpful support, quick shipping and secure packaging. That small sample supports the order-experience record; the 5.5/10 score continues to reflect limited company disclosure, sparse product-page reports and the unresolvedTB-500 document conflict.
Pepsynth states that it ships to U.S. addresses only, uses USPS or FedEx, and offers free U.S. shipping over $200. Its published 30-day guarantee is limited to defective vials. Checkout showed Apple Pay and Google Pay. A fulfillment address was not independently verified.
| Peptide | Price | Package | Stock | |
|---|---|---|---|---|
| BPC-157COA not available | $71.25 | 10mg | In stock | View listing ↗ |
| TB-500COA not available | $75.00 | 5mg | In stock | View listing ↗ |
| MOTS-cCOA not available | $67.20 | 10mg | In stock | View listing ↗ |
| MOTS-cCOA not available | $123.00 | 20mg | In stock | View listing ↗ |
| MOTS-cCOA not available | $210.00 | 40mg | In stock | View listing ↗ |
| NAD+COA not available | $168.75 | 500mg | In stock | View listing ↗ |
| Semax1-test panel COA available Prime Analytical Laboratories · Report strength 10 mg | $30.00 | 5mg | In stock | View listing ↗ |
| Semax1-test panel COA verified Prime Analytical Laboratories | $45.00 | 10mg | In stock | View listing ↗ |
| Selank1-test panel COA verified Prime Analytical Laboratories | $36.00 | 10mg | In stock | View listing ↗ |
| CJC-1295 (With DAC)COA not available | $56.25 | 10mg | In stock | View listing ↗ |
| Tesamorelin1-test panel COA available Prime Analytical Laboratories · Report strength 20 mg | $31.50 | 5mg | In stock | View listing ↗ |
| Tesamorelin1-test panel COA verified Prime Analytical Laboratories | $127.50 | 20mg | In stock | View listing ↗ |
| IpamorelinCOA not available | $58.00 | 5mg | In stock | View listing ↗ |
| IpamorelinCOA not available | $81.00 | 10mg | In stock | View listing ↗ |
| GLP-1S1-test panel COA verified Prime Analytical Laboratories | $165.00 | 10mg | In stock | View listing ↗ |
| GLP-1S1-test panel COA available Prime Analytical Laboratories · Report strength 10 mg | $260.00 | 20mg | In stock | View listing ↗ |
| GHK-Cu (Copper Peptide)COA not available | $71.25 | 50mg | In stock | View listing ↗ |
| GLOWCOA not available | $112.50 | 70mg | In stock | View listing ↗ |
| KLOW ProtocolCOA not available | $156.00 | 80mg | In stock | View listing ↗ |
| AOD-96041-test panel COA verified Prime Analytical Laboratories | $60.00 | 10mg | In stock | View listing ↗ |
| AOD-96041-test panel COA available Prime Analytical Laboratories · Report strength 10 mg | $30.00 | 5mg | In stock | View listing ↗ |
| CJC-1295 (No DAC)COA not available | $45.00 | 5mg | In stock | View listing ↗ |
| Epithalon (Epitalon)1-test panel COA verified Prime Analytical Laboratories | $52.50 | 10mg | In stock | View listing ↗ |
| OxytocinCOA not available | $120.00 | 10mg | In stock | View listing ↗ |
| OxytocinCOA not available | $120.00 | 10mg | In stock | View listing ↗ |
| 5-Amino-1MQCOA not available | $164.50 | 5mg | In stock | View listing ↗ |
| KPV1-test panel COA verified Prime Analytical Laboratories | $30.00 | 5mg | In stock | View listing ↗ |
| PinealonCOA not available | $41.25 | 10mg | In stock | View listing ↗ |
| CagrilintideOut of stockCOA not available | $150.00 | 10mg | Out of stock | View listing ↗ |
| WolverineOut of stockCOA not available | $123.74 | 20mg | Out of stock | View listing ↗ |
| SS-31 (Elamipretide)Out of stockCOA not available | $50.00 | 10mg | Out of stock | View listing ↗ |
| SS-31 (Elamipretide)Out of stockCOA not available | $255.00 | 50mg | Out of stock | View listing ↗ |
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Five cheapest in-stock package prices per compound across every tracked vendor — not just Pepsynth Labs.
