Understand the source comparison
Peptide Safety 101 Beginner Must Know: Storage vs. Reconstituted Comparison
Temperature −20°C (laboratory freezer) 2–8°C (refrigerator) Degradation doubles per 10°C increase; 6-hour ambient exposure = 12–18% potency loss Non-negotiable. Temperature discipline is the single most critical safety variable. Shelf Life 24–36 months when se
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- Temperature
- −20°C (laboratory freezer)
- 2–8°C (refrigerator)
- Degradation doubles per 10°C increase; 6-hour ambient exposure = 12–18% potency loss
- Non-negotiable. Temperature discipline is the single most critical safety variable.
- Shelf Life
- 24–36 months when sealed
- 28 days maximum after mixing
- Oxidative degradation exceeds 15% after 28 days even under proper refrigeration
- The 28-day limit exists because bacteriostatic water prevents bacterial growth but not peptide oxidation.
- Light Exposure
- Store in original amber vial or foil-wrapped container
- Keep in refrigerator away from direct light
- UV and visible light catalyse oxidation reactions that break peptide bonds
- Light-sensitive peptides lose 8–12% potency per week under standard laboratory lighting.
- Handling Frequency
- Minimize freeze-thaw cycles; max 3 cycles
- Single-use aliquots preferred; never refreeze after thawing
- Each freeze-thaw cycle causes 5–8% potency loss through ice crystal formation and osmotic stress
- If you must aliquot, do it immediately after reconstitution and freeze aliquots separately.