Tesamorelin Storage: Temperature Is Everything
Lyophilized Tesamorelin stored at -20°C in a frost-free freezer can maintain stability for 2+ years. The biggest enemy of peptide stability isn’t time — it’s temperature fluctuation and moisture exposure.
I’ve seen labs lose entire batches of expensive peptides because of improper storage. A $50 lab freezer failure can destroy thousands of dollars in research compounds. Here’s how to avoid that.
Storage Temperature Guide
- Short-term (days to weeks): 4°C refrigeration is acceptable for lyophilized powder
- Long-term (months to years): -20°C is the recommended standard
- Ultra-long-term: -80°C for maximum stability, especially for sensitive sequences
- After Reconstitution: Store at 4°C and use within the timeframe specified by the supplier
Reconstitution Best Practices
Always use sterile, bacteriostatic water or the solvent specified in your protocol for reconstituting Tesamorelin. Tap water or non-sterile solvents introduce contaminants that degrade the peptide and compromise experimental results.
Key handling rules:
- Let the vial reach room temperature before opening to prevent condensation
- Use aseptic technique — work in a clean environment with sterile equipment
- Aliquot into single-use portions to avoid repeated freeze-thaw cycles
- Label everything with date of reconstitution and concentration
FAQ
How long does reconstituted Tesamorelin last in the refrigerator?
Typically 2-4 weeks at 4°C, but this varies by peptide sequence and the solvent used for reconstitution. Always follow the supplier’s specific guidelines for your batch.
Can I freeze reconstituted peptide?
Some peptides tolerate freeze-thaw cycles better than others — Tesamorelin is generally stable for 2-3 cycles, but avoid repeated freezing when possible. Aliquot into single-use portions to minimize freeze-thaw stress.
Proper storage is the difference between reliable research data and wasted resources. Invest in temperature monitoring.