Stored properly in lyophilized form, peptides can remain stable for a long time, often two years or more when frozen, dark, and dry. Once reconstituted, the usable window shortens to a matter of weeks.
Dry (lyophilized) shelf life
Because lyophilization removes the water that drives degradation, a dry peptide is remarkably durable. Kept frozen and protected from light and moisture, many peptides stay stable for years.
Reconstituted shelf life
Adding water changes everything. A reconstituted solution is far more sensitive and generally lasts weeks in the refrigerator rather than years.
| Form | Storage | Typical window |
|---|---|---|
| Lyophilized | Freezer, dark, dry | Often 2+ years |
| Reconstituted | Refrigerated | A period of weeks |
Browse research-grade peptides
Every Axis compound is third-party tested to 99.4%+ purity, with a certificate of analysis on every batch.
Key takeaways
- Lyophilized peptides, frozen and dry, often last two years or more.
- Reconstituted peptides last weeks in the refrigerator.
- Removing water is why the dry form lasts so much longer.
- Heat, light, moisture, and freeze-thaw all shorten shelf life.
A note on research use
The peptides supplied by Axis Peptide Labs are reference compounds for laboratory and research use only. They are intended for qualified researchers working in academic, institutional, and analytical settings. They are not drugs, foods, cosmetics, or medical products, and they are not intended for human or veterinary consumption. Documented identity and documented purity are what matter most when sourcing a compound, both of which are published on the Axis certificates of analysis page.
