Understand the source comparison
TB-4 Storage: Method Comparison
Refrigerator (middle shelf, foil-wrapped) 2–8°C 28 days Yes (within 28 days of first puncture) Yes Gold standard. Maintains peptide potency and bacteriostatic water sterility across the full recommended window. Refrigerator (door shelf, clear vial) 4–10°C (flu
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Refrigerator (middle shelf, foil-wrapped)
- 2–8°C
- 28 days
- Yes (within 28 days of first puncture)
- Yes
- Gold standard. Maintains peptide potency and bacteriostatic water sterility across the full recommended window.
- Refrigerator (door shelf, clear vial)
- 4–10°C (fluctuates)
- 14–21 days
- Yes (degrades faster due to temp swings)
- No
- Acceptable short-term but introduces unnecessary variables. Temperature fluctuation and light exposure both accelerate degradation.
- Room temperature (20–25°C, foil-wrapped)
- 20–25°C
- 7–10 days
- Yes (benzyl alcohol still active)
- Not recommended. Potency loss of 15–20% per week at this temperature range makes dosing inconsistent by week two.
- Freezer storage (−20°C, reconstituted)
- −20°C
- Not recommended
- No (freeze-thaw causes protein aggregation)
- Hard reject. Freezing reconstituted peptides causes ice crystal formation that disrupts peptide structure. Use only for lyophilised powder.
- Insulated travel case (FRIO-type, 2–8°C maintained)
- 24–48 hours
- Depends on case opacity
- Acceptable for short-term transport only. Return to refrigerator as soon as possible after travel period ends.