tesamorelin storage: Frequently asked questions

Discard the vial. Eight hours at 22°C accelerates aggregation equivalent to one full week of refrigerated storage. Even if the solution appears clear, aggregated peptides can still be present in concentrations that render the dose unreliable. No home test exists to confirm potency post-excursion. The financial loss is smaller than the research integrity risk of using compromised material.

Use a medical-grade insulin cooler or portable refrigerator rated for 2–8°C. Standard ice packs in a soft-sided cooler are insufficient. They often drop below 0°C (freezing risk) or rise above 10°C once the ice melts. FRIO wallets use evaporative cooling and maintain 2–8°C for 36–48 hours without refrigeration, but they require activation (soaking in water) 10 minutes before use. For same-day transport under 4 hours, a pre-chilled insulated container with a calibrated gel pack works. Verify the internal temperature with a thermometer before placing the vial inside.

Do not reconstitute. Clumping indicates prior moisture infiltration, and discoloration (yellow, brown, or gray tint) signals oxidation or thermal degradation. Contact the supplier immediately. Reputable sources like Real Peptides replace compromised vials at no cost. Using a degraded vial compromises the entire research protocol and invalidates any results obtained.

Check the duration and peak temperature reached. If the outage lasted fewer than 4 hours and the freezer remained below 0°C, the peptide is likely stable. If the freezer reached 10°C or higher for more than 6 hours, assume partial degradation. Potency loss of 10–20% is probable. If the vial thawed completely and remained above 15°C for 12+ hours, discard it. Lyophilised peptides tolerate brief ambient exposure but not prolonged thermal stress.

Remain calm and present your documentation immediately. Prescription label, physician letter, and a brief verbal explanation that this is prescribed medication requiring refrigeration. TSA officers encounter insulin and other refrigerated biologics daily; tesamorelin is less common but falls under identical medical necessity rules. If an officer requests to open your cooler or handle the vial, allow it. Refusing escalates the situation unnecessarily. They may swab the exterior for explosives residue or request additional screening, which adds 5–10 minutes but rarely results in confiscation when documentation is in order. If you encounter an officer unfamiliar with peptide medications, politely request a supervisor or ask them to consult TSA's medical exemption guidelines, which explicitly permit refrigerated prescription medications with physician documentation.

Thermal stress accumulates. Each hot exposure adds to total degradation even if you re-cool between segments. If you travel with tesamorelin from a temperate zone through a tropical airport layover to a cold destination, the 4-hour tropical exposure matters more than the 12 hours of cold bookending it. Pre-plan cooling equipment capacity for the hottest segment of your journey, not the average. For complex itineraries with extreme temperature variation, consider whether it's safer to travel with unreconstituted lyophilized powder and reconstitute at your destination if you have access to bacteriostatic water and sterile technique. Unreconstituted powder tolerates temperature variation far better than reconstituted solution.

Immediately move the tesamorelin vial to the coldest available location. Hotel mini-fridge, restaurant walk-in cooler, or pharmacy refrigerator. Explain to staff that you have temperature-sensitive prescription medication and need emergency refrigeration while you source replacement cooling equipment. Most hotels and restaurants accommodate this request when you present your prescription documentation. If no refrigeration is available within 2–3 hours, the peptide is likely compromised. Contact your prescribing physician to discuss whether continuing the protocol makes sense or whether you should pause until returning home. Visual inspection cannot confirm potency, so when in doubt, treat the vial as degraded and order a replacement rather than risk injecting inactive compound.