Source comparison
TB-500 Research Strength Considerations: Supplier Comparison
Verified research supplier (503B-equivalent oversight) Small-batch solid-phase with per-step coupling verification HPLC chromatogram + MS/MS sequencing + CoA per batch Consistent across batches. Synthesis protocol standardised ≥98% by HPLC, sequence-verified R
This comparison does not assign a generated winner or score.
- Verified research supplier (503B-equivalent oversight)
- Small-batch solid-phase with per-step coupling verification
- HPLC chromatogram + MS/MS sequencing + CoA per batch
- Consistent across batches. Synthesis protocol standardised
- ≥98% by HPLC, sequence-verified
- Required for reproducible research. Only option where you can trace every synthesis step
- Bulk peptide distributor
- Automated large-scale synthesis
- HPLC chromatogram only (mass spec on request)
- Variable. Different batches may come from different contract manufacturers
- 95–98% by HPLC, sequence not always verified
- Acceptable for preliminary work if CoA is reviewed carefully. Not suitable for publication-grade research
- Unverified online supplier
- Unknown (often repackaged from bulk sources)
- Certificate of authenticity (not analysis). Vague claims without data
- Unknown. No batch tracking
- Unknown (often mislabeled)
- High risk of receiving incorrect peptide or heavily contaminated product. Avoid entirely