Source comparison
Thymosin Alpha-1 Verification: Method Comparison
COA Review Batch-specific purity and molecular weight were measured (if COA is legitimate) Cannot verify COA authenticity without contacting testing lab $0 (included with purchase) Immediate Essential first step. But insufficient alone, because COAs are easily
This comparison does not assign a generated winner or score.
- COA Review
- Batch-specific purity and molecular weight were measured (if COA is legitimate)
- Cannot verify COA authenticity without contacting testing lab
- $0 (included with purchase)
- Immediate
- Essential first step. But insufficient alone, because COAs are easily forged
- Reconstitution Test
- Peptide dissolves as expected; no obvious contamination or degradation
- Cannot confirm sequence identity or distinguish similar peptides
- $0 (requires only sterile water and observation)
- 2 minutes
- Catches obvious fraud (wrong compound, severely degraded material) but misses sophisticated substitution
- Third-Party HPLC
- Quantifies purity percentage based on chromatogram peak integration
- Cannot confirm peptide sequence; isomers or similar peptides may co-elute
- $150–$300 per sample
- 5–7 business days
- Useful for purity quantification but does not definitively verify thymosin alpha-1 identity
- UPLC-MS/MS
- Confirms molecular weight, amino acid sequence, and purity in one analysis
- Requires specialized equipment and trained interpretation
- $300–$800 per sample
- 5–10 business days
- Gold standard. The only method that definitively confirms both identity and purity for research use