Source comparison
Verify Tesamorelin Purity: Storage & Degradation Comparison
−80°C, desiccated, nitrogen-flushed vial 98.2% 97.9% 97.6% None significant Gold standard. Minimal degradation over one year −20°C, sealed vial with desiccant 97.1% 96.3% Oxidation (Met residues) Acceptable for most research timelines. Use within 12 months +4°
This comparison does not assign a generated winner or score.
- −80°C, desiccated, nitrogen-flushed vial
- 98.2%
- 97.9%
- 97.6%
- None significant
- Gold standard. Minimal degradation over one year
- −20°C, sealed vial with desiccant
- 97.1%
- 96.3%
- Oxidation (Met residues)
- Acceptable for most research timelines. Use within 12 months
- +4°C refrigeration (lyophilized powder)
- 94.8%
- 91.2%
- Hydrolysis, aggregation
- Use within 90 days maximum. Not suitable for long-term storage
- Room temperature (+20°C to +25°C)
- 89.1%
- 78.5%
- Aggregation, sequence clipping
- Unacceptable. Purity loss exceeds acceptable variance within six months
- Reconstituted in bacteriostatic water at +4°C
- 98.2% (at reconstitution)
- 92.3%
- 85.7%
- Bacterial contamination risk, hydrolysis
- Use reconstituted solutions within 28 days. Refrigeration slows but doesn't stop degradation
- Reconstitution introduces a new degradation pathway: hydrolysis in aqueous solution. Tesamorelin in bacteriostatic water at +4°C loses approximately 0.8–1.2% purity per month through peptide bond cleavage. If you're running multi-week protocols, aliquot the reconstituted solution into single-use vials and freeze at −20°C immediately after reconstitution. Thaw only what you need for each dosing session. Never refreeze a thawed aliquot.