Peptide Storage Guide
Proper storage is the difference between peptides that work and expensive water. Here's everything you need to know to keep your compounds potent.
Lyophilized (Powder)
- Keep in original sealed vial
- Store in cool, dark place
- Refrigerator preferred but not required
- Freezer OK for long-term storage
- Avoid humidity
Reconstituted (Mixed)
- MUST be refrigerated immediately
- Keep in back of fridge (coldest, most stable)
- Never freeze reconstituted peptides
- Use within 28-30 days max
- Don't leave out during injection prep
Temperature: The Details
🌡️ Ideal Temperature Ranges
DO
- • Store in the back of the fridge (most stable)
- • Use a dedicated fridge drawer if possible
- • Keep away from the freezer compartment
- • Allow fridge to stabilize after opening
- • Consider a mini-fridge just for peptides
DON'T
- • Store in fridge door (temp fluctuates)
- • Freeze reconstituted peptides
- • Leave out during meal prep (busy kitchen)
- • Store near produce (ethylene gas)
- • Keep in car, even "just for a bit"
Light Sensitivity
Why Light Matters
UV and visible light can break down peptide bonds through photodegradation. Some peptides are more sensitive than others, but it's best practice to protect all of them from light exposure.
Most Light-Sensitive:
- • Semax / Selank
- • Melanotan II
- • PT-141
- • GHRP-6
Protection Tips:
- • Keep in original box when possible
- • Wrap vials in aluminum foil
- • Use amber vials for transfers
- • Store in opaque container in fridge
Shelf Life by Peptide
These are conservative estimates for properly stored peptides. Your mileage may vary based on storage conditions.
| Peptide | Powder | Reconstituted | Notes |
|---|---|---|---|
| BPC-157 | 2+ years | 28 days | Very stable |
| TB-500 | 2+ years | 21-28 days | Stable |
| Ipamorelin | 2 years | 21 days | Moderate stability |
| CJC-1295 | 2 years | 21 days | DAC version more stable |
| GHK-Cu | 2 years | 14-21 days | Copper complex helps stability |
| Semax | 2 years | 14 days | Keep away from light |
| PT-141 | 2 years | 14-21 days | Temperature sensitive |
| Semaglutide | Per manufacturer | 28-56 days | Very stable once mixed |
Signs of Degradation
Know when to toss it. Using degraded peptides is pointless at best, risky at worst.
Cloudy or milky appearance
Discard immediately
Particles or floaters visible
Do not use - contamination likely
Color change (yellowing)
Potency compromised - replace
Unusual smell
Contaminated - discard
Clumping that won't dissolve
Degraded - reduced effectiveness
Rubber stopper deterioration
Integrity compromised
Traveling with Peptides
Vacation doesn't mean your protocol has to stop. Here's how to travel smart.
Use an insulated cooler bag
Small soft coolers work great. Hard insulin cases are even better.
Ice packs, not ice
Gel ice packs won't leak. Wrap peptides so they don't touch ice directly (too cold!).
Carry a thermometer
Digital fridge thermometers are cheap. Know your temps.
Keep reconstituted peptides in checked luggage carefully
Cargo holds can freeze. Consider hotel fridge upon arrival.
Bring extra BAC water
Easier to transport lyophilized and reconstitute at destination.
Documentation for TSA
Prescription or doctor's note helps. Most peptides fly fine with medical supplies.
Pro Tips
Label everything. Date of reconstitution, peptide name, concentration. Future you will be grateful.
Buy a fridge thermometer. $10 investment. Know your fridge is actually at the right temp.
Don't reconstitute everything at once. Only mix what you'll use in 3-4 weeks. Keep extras as powder.
Minimize needle punctures. Each time you pierce the stopper, you introduce potential contamination. Draw multiple doses if doing AM/PM.
When in doubt, throw it out. Peptides are too important to gamble on. Fresh vial > questionable vial.