Lab Reference
Storage & Handling
Peptides are temperature- and light-sensitive molecules. Proper storage is the single biggest factor in maintaining purity and potency from shipment through the end of your research protocol. Follow the guide below for every compound shipped from Peptide Logix.
In transit
2–8°C
Every order ships cold-chain with insulated packaging and gel ice packs. Domestic delivery takes 2–5 business days.
On arrival
Inspect → Refrigerate
Open immediately. If the cold pack is fully melted but the vial still feels cool, refrigerate at 2–8°C. If warm, contact support.
Long-term
-20°C
Store lyophilized powder at -20°C (or colder) in the dark. Vials ship sealed under vacuum; keep the stopper clean.
Lyophilized (freeze-dried) powder
Before reconstitution
Short-term storage
2–8°C (standard refrigerator). Stable for several weeks at this temperature if the vial remains sealed.
Long-term storage
-20°C or colder is ideal. Properly stored lyophilized peptides remain stable for 18–24 months from manufacture.
Light protection
Always protect from direct UV and bright light. Our amber vials block most light, but store in a closed box for extra safety.
Moisture control
Vials ship vacuum-sealed. Allow a sealed vial to equilibrate to room temperature before opening to prevent condensation.
Reconstituted solution
After adding BAC water
Always refrigerate
2–8°C after reconstitution. Never leave reconstituted peptide at room temperature for more than a few minutes.
Do NOT freeze
Freezing the reconstituted solution creates ice crystals that can denature the peptide and damage the vial stopper. Refrigeration only.
Shelf life
Typically 14–30 days depending on the peptide. Use bacteriostatic water (0.9% benzyl alcohol) for multi-day protocols; sterile water only for single-use.
Aseptic technique
Wipe the stopper with 70% isopropyl alcohol before every draw. Use a new sterile syringe each time. Never touch the stopper with fingers.
Shipping & on-arrival protocol
What to do when your order arrives
- 1
Open the insulated box immediately
Don't leave sealed packages sitting in a hot mailbox or sunlit porch. Move the vial indoors as soon as possible.
- 2
Inspect temperature and packaging
Vials should feel cool to the touch. The gel ice pack may be partially melted — that's normal on multi-day shipments. If anything is cracked or leaking, photograph and contact us.
- 3
Refrigerate right away (long-term storage)
If you'll use the vial within weeks: 2–8°C refrigerator. If you'll store it longer: move to -20°C freezer as soon as practical.
- 4
Verify CoA matches the lot number
Every vial has a lot # printed on the label and a matching Certificate of Analysis in the package. Save the CoA with your records.
- 5
Equilibrate before reconstitution
Move from freezer → fridge for 2–4 hours, then leave sealed at room temperature for 15–30 minutes before opening. Prevents condensation from entering the vial.
Best practices for handling
Maximize stability, minimize contamination
- ›Add bacteriostatic water slowly down the side of the vial — never spray directly onto the lyophilized cake.
- ›Swirl gently to dissolve. Do NOT shake or vortex — shear forces can damage the peptide.
- ›Allow 30–60 seconds for full dissolution. If cloudiness persists, gentle rolling may help.
- ›After reconstitution, label the vial with the date, BAC volume, and resulting concentration.
- ›Use a fresh sterile insulin syringe (U-100, 29–31G) for every draw.
- ›Wipe the rubber stopper with 70% IPA before AND after each draw.
- ›Return the vial to the refrigerator immediately after each draw.
- ›Discard any solution showing particles, discoloration, or unusual odor.
- ›Never combine multiple peptides in the same vial unless explicitly formulated for it (e.g., blends).
- ›For travel: keep the vial cool with a small insulated pouch + mini ice pack (frozen water bottle wrapped in cloth works).
Stability reference
Shelf life for common compounds
| Peptide | Lyophilized | Reconstituted | Note |
|---|---|---|---|
| Retatrutide | 24 mo @ -20°C | 21–28 d @ 2–8°C | Refrigerate after reconstitution; avoid freeze-thaw |
| Tirzepatide | 24 mo @ -20°C | 21–28 d @ 2–8°C | Protect from light |
| Semaglutide | 24 mo @ -20°C | 28 d @ 2–8°C | Do not freeze after reconstitution |
| Tesamorelin | 24 mo @ -20°C | 14–21 d @ 2–8°C | BAC water strongly recommended |
| MOTS-c | 18 mo @ -20°C | 14 d @ 2–8°C | Sensitive to oxidation — minimize air exposure |
| NAD+ | 18 mo @ -20°C | 7–14 d @ 2–8°C | Highly hygroscopic — seal tightly |
| Glutathione | 24 mo @ -20°C | 14–21 d @ 2–8°C | Avoid prolonged room-temperature exposure |
| Glow Blend (GHK-Cu + BPC + TB-500) | 24 mo @ -20°C | 21 d @ 2–8°C | Copper-peptide complex — keep cool |
| Klow Blend | 24 mo @ -20°C | 21 d @ 2–8°C | Multi-peptide blend, refrigerate promptly |
| BPC-157 | 24 mo @ -20°C | 30 d @ 2–8°C | Highly stable in solution |
| TB-500 | 24 mo @ -20°C | 30 d @ 2–8°C | Stable — keep sealed between draws |
| GHK-Cu | 24 mo @ -20°C | 14 d @ 2–8°C | Sensitive to EDTA chelators |
| CJC-1295/Ipamorelin | 24 mo @ -20°C | 21 d @ 2–8°C | Refrigerate; protect from light |
| Kisspeptin | 18 mo @ -20°C | 14 d @ 2–8°C | Avoid repeated freeze-thaw |
Ranges are conservative research-laboratory estimates for properly handled product. Actual stability depends on storage conditions, reconstitution technique, and contamination control.
Safety & compliance
- For in-vitro research use only. Not for human or veterinary consumption. Not a drug, food, or cosmetic.
- Handle using standard laboratory PPE — gloves, lab coat, eye protection.
- Dispose of reconstituted solution and used syringes in accordance with your institution's chemical-waste guidelines.
- If a vial arrives damaged or warm beyond recovery, contact support@peptidelogix.com within 48 hours with photos and your order number.