How To Store Tesamorelin Properly
· Peptide Q&A
Store tesamorelin in the refrigerator at 36 to 46 degrees Fahrenheit (2 to 8 degrees Celsius) in both its lyophilized (freeze-dried) and reconstituted forms. Keep it away from light, do not freeze it, and never leave it at room temperature for extended periods. Proper storage preserves the peptide's potency and ensures safe, effective dosing.
Tesamorelin is a protein-based peptide, which makes it sensitive to heat, light, and physical agitation. Following correct storage practices from the moment you receive your shipment is essential to getting full value from the product.
Storing Lyophilized (Unreconstituted) Tesamorelin
Lyophilized tesamorelin is the freeze-dried powder form that has not yet been mixed with bacteriostatic water. It is the more stable of the two forms.
- Temperature: Refrigerate at 36 to 46 degrees F (2 to 8 degrees C). Some sources indicate lyophilized peptides can tolerate brief periods at room temperature, but refrigeration is always preferred.
- Light: Store in the original packaging or a dark container. UV light can degrade peptide bonds over time.
- Shelf life: Lyophilized tesamorelin typically maintains potency for several months to over a year when stored properly. Check the expiration date on your vial.
- Do not freeze: While freeze-drying is part of the manufacturing process, freezing a finished vial at home can cause structural damage to the peptide.
Storing Reconstituted Tesamorelin
Once you add bacteriostatic water to the lyophilized powder, tesamorelin becomes a solution that is significantly more fragile.
- Temperature: Must be refrigerated at 36 to 46 degrees F at all times.
- Shelf life: Use reconstituted tesamorelin within 20 to 28 days, depending on your pharmacy's guidance. Some compounders specify a shorter window.
- Avoid shaking: Peptides can denature (lose their structure) when agitated. Swirl the vial gently to mix; never shake it.
- Keep the vial upright: Store reconstituted vials in an upright position to keep the rubber stopper dry and reduce contamination risk.
- Use clean technique: Wipe the vial stopper with an alcohol swab before each draw to prevent bacterial contamination.
Common Storage Mistakes
- Leaving vials on the counter: Even 30 minutes at room temperature after reconstitution can begin to degrade the peptide, especially in warm climates.
- Storing near the freezer compartment: The back of the refrigerator or areas near the freezer vent may be cold enough to freeze the solution. Place vials on a middle shelf or in the door compartment.
- Exposing to sunlight: Do not store vials on a window ledge or in a clear container that allows light exposure.
- Using expired reconstituted solution: If your vial has been reconstituted for longer than the recommended period, discard it even if the solution looks clear.
peptide storage best practices
Travel and Storage
When traveling with tesamorelin, use an insulated medical cooler with gel packs. Do not place the vial directly against an ice pack, as this can freeze the solution. For short trips (under 8 hours), a quality insulated pouch will maintain adequate temperature. For longer travel, consider bringing lyophilized vials and reconstituting at your destination.
Frequently Asked Questions
Can I freeze tesamorelin to extend its shelf life?
No. Freezing reconstituted tesamorelin can damage the peptide's molecular structure, reducing its effectiveness. Lyophilized tesamorelin should also not be frozen at home. Stick to refrigerator temperatures between 36 and 46 degrees F.
How can I tell if my tesamorelin has gone bad?
Signs of degradation include cloudiness, visible particles, discoloration, or an unusual smell in the reconstituted solution. Clear solution does not guarantee potency, but visible changes always indicate the product should be discarded. When in doubt, replace the vial.
What happens if tesamorelin is left out of the fridge overnight?
A single overnight exposure at room temperature may reduce potency but does not necessarily render the peptide useless. If the room was cool (below 75 degrees F) and the vial was reconstituted recently, it may still be viable. However, repeated temperature excursions compound the degradation. Contact your pharmacist for guidance.
Should I store tesamorelin with the needle still in the vial?
No. Always remove the syringe after drawing your dose and store the vial with only the rubber stopper sealing it. Leaving a needle in the vial creates a pathway for bacterial contamination and can compromise the sterility of the remaining solution.
Can I store multiple vials together?
Yes. Storing multiple vials in a small container or bag in the refrigerator is fine. Just ensure they are upright, not touching anything that could freeze them, and clearly labeled with reconstitution dates so you use the oldest vial first. peptide organization tips