Source comparison
Thymosin Alpha-1 Quality Real vs Fake: Supplier Comparison
Choosing a peptide supplier isn't about price. It's about verifiable manufacturing standards and transparent documentation. This table compares the markers that separate pharmaceutical-grade suppliers from counterfeit operations. Third-Party CoA Provides indep
This comparison does not assign a generated winner or score.
- Choosing a peptide supplier isn't about price. It's about verifiable manufacturing standards and transparent documentation. This table compares the markers that separate pharmaceutical-grade suppliers from counterfeit operations.
- Third-Party CoA
- Provides independent lab CoA with HPLC chromatogram, mass spec data, and batch number matching your vial
- No CoA provided, or supplies in-house "certificate" with no external lab verification
- Without independent verification, you're trusting marketing claims over measurable data
- Synthesis Method
- Solid-phase peptide synthesis with Fmoc chemistry, documented coupling efficiency >99% per cycle
- Undisclosed synthesis method or vague claims of "pharmaceutical process" without specifics
- SPPS is the industry standard for peptides under 50 amino acids. Anything else is a red flag
- Purity Testing
- RP-HPLC showing purity >98%, with mass spectrometry confirming exact molecular weight within ±0.01%
- No purity data, or claims like "99% pure" without supporting chromatography
- Purity percentage without HPLC data is meaningless. The chromatogram is the proof
- Endotoxin Testing
- LAL assay results showing <5 EU/mg, tested per batch
- No endotoxin data provided or "tested to pharmaceutical standards" without numbers
- Endotoxin contamination is invisible and skews immune research. This test is non-negotiable
- Storage and Shipping
- Ships with cold packs and temperature-monitoring strips, guarantees −20°C storage before shipment
- Ambient shipping in padded envelope with no temperature control
- Temperature excursions denature peptides irreversibly. Cold chain integrity matters more than synthesis quality
- Price Range (10mg)
- $180–$280 reflecting GMP synthesis, third-party testing, and proper handling
- $40–$90 indicating shortcuts in synthesis, no testing, or counterfeit product
- Pharmaceutical-grade synthesis costs real money. Prices below $150/10mg signal compromised quality