[VERIFIED] Vendor application thread — apply here
This is the official staff-maintained list of verified vendors. Vendors on this list have been independently tested through Janoshik Analytical and/or PeptideMeter Analytics, and have demonstrated consistent quality over multiple orders from community members.
Currently Verified Vendors
| Vendor | Avg Purity | Community Tests | Status |
|---|---|---|---|
| QSC (Qingdao Sigma Chemical) | 97.3% | 56 Janoshik tests | ✅ Verified |
| WWB (Wuhan Wansheng Bio) | 96.5% | 7 Janoshik tests | ✅ Verified |
| GGPeps (GYC / Nantong Guangyuan) | 96.8% | 11 Janoshik + PeptideMeter tests | ✅ Verified |
What "Verified" Means
- Multiple independent community test results on file
- Consistent purity above 95% across batches
- No unresolved scam reports or serious quality complaints
- Active communication channels with community representatives
Verification does NOT mean endorsement. CompoundTalk does not process, guarantee, or facilitate orders. Always verify products independently and consult your healthcare provider.
This list is reviewed and updated monthly. Last update: June 2026.
Janoshik Analytical — Independent Testing
Trusted third-party HPLC & mass spectrometry analysis. Verify peptide purity with the lab the community relies on. Independent. Accurate. Transparent.
Verify Your PeptidesGL Biochem (Shanghai) Ltd. — Direct Manufacturer
Est. 1998. The synthesis house behind the vials you send for testing. ISO 9001 and cGMP certified, 1,500+ staff, batch-specific COA with every order.
Browse GL Biochem