How to store peptides before and after reconstitution — freezer, fridge, travel — and how long each state is viable.
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Peptides are fragile. A compound that is stable for years lyophilized can degrade meaningfully in 30 days once reconstituted, and faster still if mishandled. Keep the cold chain intact and the catalog performs as labeled. Break it, and you're dosing variable amounts of partially denatured compound.
A properly lyophilized peptide in a sealed, light-blocked vial is stable at -20°C for 24+ months, refrigerated at 2–8°C for 12+ months, and at room temperature for days to a few weeks depending on the specific compound.
Recommended: freezer (-20°C) for any vial you won't reconstitute within the next month. Freezer-stable peptides include virtually all of the NeuroForge catalog.
Exception: never expose a powder vial to freeze-thaw cycling. Pulling a vial from the freezer to room temperature and back damages structure through condensation. Reconstitute what you need; leave the rest undisturbed.
Once in solution with bacteriostatic water, most peptides are stable at 2–8°C for 28–30 days. Some compounds are shorter: DSIP, for example, starts to degrade measurably after 14–21 days and should be batched accordingly.
| State | Typical shelf life |
|---|---|
| Lyophilized, -20°C | 24+ months |
| Lyophilized, 2–8°C | 12+ months |
| Reconstituted, 2–8°C | 28–30 days |
| Reconstituted, room temperature | Do not store |
| Reconstituted, frozen | Do not freeze |
Short transit (under 24 hours) at ambient temperature is fine for lyophilized product — ship it freezer-cold in an insulated pack and it will arrive stable. Reconstituted vials are more delicate; pack them in a refrigerated cooler if transit exceeds a few hours.
Flying internationally with peptides is a jurisdictional question, not a handling question. Research it separately.
Amber vials reduce UV degradation. If you've transferred peptide into a clear vial for any reason, keep it in a drawer or opaque box when not in use.