COA Transparency
Per-batch Certificate of Analysis publication, batch numbering discipline, and public archive accessibility. Vendors who publish every batch by default score highest.
The DoseCraft Vendor Moat
The Only Peptide Vendor Directory With Real Trust Scores
Every peptide tracker logs what researchers took. DoseCraft is the only one that tells you where it came from — vetted. We score suppliers across third-party Certificate of Analysis verification, HPLC and mass-spec purity testing, cold-chain handling, customer service, and community-reputation longevity. Two vendors only — we refuse to list anyone we have not directly audited. Trust scores are editorial; affiliate status does not inflate them.
Affiliate disclosure: DoseCraft has affiliate revenue agreements with both vendors listed. A vendor losing partner status would be removed from this directory (we lose audit access) — not downgraded.
2 vetted vendors6 trust dimensionsReviewed 2026-04
Showing 2 of 2 vendors
Peptide Partners
USA · Since 2021
Elite
Trust Score4.5/5
- HPLC + Mass Spec on every batch — public lab reports
- Free replacement guarantee if independent testing fails purity
USACanada
Last verified 2026-04Trust Report
MyOasis Labs
USA · Since 2020
Elite
Trust Score4.5/5
- Widest peptide catalog (54+ compounds) — injectables, oral caps, blends
- Third-party lab tested with COAs on request
USAInternational
Last verified 2026-04Trust Report
The Methodology
How We Score Every Vendor
Six dimensions, weighted for what actually matters in research supply: purity evidence and documentation first, logistics and service second, reputation third.
Purity Verification
Third-party HPLC and mass-spectrometry testing practices. We weight independent-lab verification (e.g., ACS Independent Laboratories) over self-attested purity claims.
Cold-Chain Handling
Refrigerated shipping, gel-pack insulation, transit-time windows, and packaging integrity. Critical for peptide stability in summer transit and long international routes.
Customer Service
Refund policy clarity, email response time, dispute-handling track record, and community-reported resolution rates across Reddit and Discord signal sources.
Longevity & Reputation
Years in business combined with community-reputation depth. Long operating history plus stable community signal outweighs aggressive marketing from newer entrants.
Overall Trust
Weighted aggregate across all dimensions with purity and COA weighted heaviest. Elite tier (4.5+) reserved for vendors with best-in-class practices across every dimension.
Track Your Protocol With Vendors You Trust
DoseCraft is the only peptide tracker with vendor attribution baked into the compound log. Close the loop between what you sourced, what you logged, and what actually worked.
Start TrackingDisclaimer: DoseCraft is a research-only platform. We do not sell peptides. We have affiliate revenue agreements with both vendors listed — this is disclosed on every vendor page. Trust scores are editorial and unaffected by affiliate status. Vendor scores reflect our independent assessment as of April 2026 and are reviewed quarterly. All vendors listed are research-chem suppliers selling compounds for in-vitro investigation only — products are not intended for human consumption and have not been evaluated by the FDA to diagnose, treat, cure, or prevent any disease.