Peptide shelf-life calculator
Estimate how long a peptide keeps — lyophilized (freeze-dried) or reconstituted — based on how it's stored, and check how far into that window your vial already is.
Your vial
Estimate
Typical usable life
~24 months
lyophilized · frozen (−20°c)
Add a date to see a best-by estimate and how far along your vial is.
General storage guidance
- Lyophilized, frozen (−20°C): commonly cited as keeping ~24 months; many labs quote longer.
- Lyophilized, refrigerated (2–8°C): typically months; keep desiccated and dark.
- Reconstituted, refrigerated: often ~4 weeks with bacteriostatic water; potency declines gradually.
- Freeze–thaw cycles, light, and heat all shorten usable life.
These are general research-community estimates, not manufacturer specifications for any specific peptide. When a certificate of analysis or vendor guidance exists, prefer it.
Not medical advice.
An educational estimate for research logging only. Do not use it to judge whether a substance is safe to use.