Understand the source comparison
Glutathione Storage Comparison
Lyophilized powder (sealed) 15–25°C (room temp) 12–24 months Minimal. Residual moisture <3% limits oxidation Preferred for long-term inventory; stable without refrigeration when properly sealed 2–8°C (refrigerated) 24–36 months Minimal. Cold slows trace oxidat
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Lyophilized powder (sealed)
- 15–25°C (room temp)
- 12–24 months
- Minimal. Residual moisture <3% limits oxidation
- Preferred for long-term inventory; stable without refrigeration when properly sealed
- 2–8°C (refrigerated)
- 24–36 months
- Minimal. Cold slows trace oxidation further
- Extends shelf life beyond manufacturer date; unnecessary for intact vials
- Reconstituted solution
- 7–14 days
- Thiol oxidation to GSSG at ~0.008/day rate
- Standard protocol; use within 10 days for consistent potency
- 3–5 days
- Thiol oxidation to GSSG at ~0.025/day rate
- Rapid degradation. 15–20% potency loss per week; avoid unless used immediately
- Reconstituted solution (with ascorbic acid)
- 10–12 days
- Ascorbic acid preferentially oxidizes, sparing glutathione
- Modest stability extension; ascorbic acid itself degrades over time