Ambient / Room Temperature
Use only when the verified product specification explicitly allows this storage class. Avoid direct heat sources and strong temperature fluctuations.
Storage Guide
Storage starts with the product specification.
This guide describes the operational framework for research products and supplies. Specific temperature ranges or shelf lives are only added when verified for the individual product.
Storage classes
Four categories for the future product logic.
Refrigerated
Use only when required by the product specification. Temperature range and permitted transport times must come from verified product documentation.
Frozen
Use only for products with a matching specification. Freezing range, maximum storage duration and permitted thaw cycles must be documented per product.
Light / Moisture Protection
Apply light or moisture protection according to manufacturer or product specification. Preserve original packaging and labelling.
General storage tips
Small steps that protect material and documentation.
The following guidance is intentionally general. Once a verified product specification exists for a specific peptide, that specification always takes priority.
Use only the specified diluent
For reconstitution, use only the diluent defined in the verified product specification or approved laboratory protocol. Bacteriostatic water is not automatically appropriate for every peptide.
Keep the vial septum clean
For sterile vials, clean and disinfect the septum before another puncture according to the intended aseptic workflow.
Keep the specified temperature range stable
Store material within its validated temperature range whenever possible. Unplanned temperature excursions should be documented and assessed.
Protect from light where required
Keep light-sensitive material in original packaging or protected from light. Avoid direct sunlight.
Minimise freeze-thaw cycles
Do not freeze a prepared solution unless the product specification explicitly permits it. Repeated freezing and thawing can affect the stability of some peptides.
Document date and batch
For prepared laboratory solutions, record the date, batch, diluent used and relevant storage information in a traceable way.
Lyophilised material
Keep dry, protected and within specification.
Lyophilised peptides are often more stable than solutions, but moisture, light and unsuitable temperatures should still be avoided. Keep material in its original packaging until it is needed in the intended laboratory workflow.
Whether room temperature, refrigerated or frozen storage is acceptable should not be assumed. That information belongs in the verified product specification.
After reconstitution
Solutions require tighter control.
After reconstitution, stability conditions change. Diluent, concentration, container, pH, temperature and microbiological handling can all affect stability.
For that reason, reconstitution date, batch and storage conditions should be documented, and generic in-use periods should not be transferred from one peptide to another.
Peptide-specific
Select a peptide and read the specific guidance.
The official reference values below relate to approved finished medicinal products where such products exist. Specific storage values for our research vials are added only after the supplier specification has been verified.
GLP-1
FDA · WEGOVY Injection · 2026 ↗Semaglutide
01Official finished-product reference
FDA storage information for WEGOVY Injection specifies 2–8 °C, protection from light and explicitly: do not freeze.
02Temporary unrefrigerated storage
For the approved WEGOVY finished product, the label allows 8–30 °C for up to 28 days before cap removal.
03Research vial
These values apply to WEGOVY as a finished medicinal product and must not automatically be transferred to a lyophilised research vial. The verified supplier specification governs our research material.
04After reconstitution
Do not infer a universal shelf life or temperature. Diluent, concentration, container and stability data must be verified for the specific research material.
GIP + GLP-1
FDA · ZEPBOUND · 2026 ↗Tirzepatide
01Official finished-product reference
FDA storage information for ZEPBOUND specifies 2–8 °C, protection from heat and light and explicitly: do not freeze.
02Temporary unrefrigerated storage
For approved single-dose pens and single-dose vials, FDA labeling allows up to 21 days at temperatures not exceeding 30 °C. Other ZEPBOUND presentations have their own rules.
03Research vial
ZEPBOUND information applies to the approved tirzepatide finished product. A lyophilised research vial must follow the verified specification for that material.
04After reconstitution
Do not apply a generic 14-, 21- or 28-day rule. Stability and storage of a prepared research solution must come from product-specific data.
GIP + GLP-1 + Glucagon
Eli Lilly · Development status · 09/2026 ↗Retatrutide
01Current status
As of October 2026, retatrutide remains investigational and has not been approved as a medicinal product by a regulatory authority.
02No approved storage label
There is therefore no approved finished-product storage label comparable to WEGOVY or ZEPBOUND.
03Research material
Temperature range, light protection, freezing conditions and shelf life must come directly from the verified specification of the actual research material obtained.
04After reconstitution
Without validated stability data, no generic time or temperature values are provided.
Storage workflow
Goods receipt
Capture product, supplier, batch/lot, quantity and visible condition.
Verify specification
Check the verified storage requirement of the specific product against the planned storage zone.
Assign storage zone
Assign the product to a documented storage class and defined location.
Monitoring
Where required, retain traceable temperature or environmental records.
Handle excursion
If an excursion occurs, identify and separate the goods and release them only after documented assessment.
Traceability
What should be documented per storage position.
The goal is a clear connection between product, batch, storage location and documentation.
01Product name / SKU02Batch or lot ID03Goods receipt date04Storage class05Storage location06Verified target conditions07Monitoring reference08Excursion status
Common mistakes
What to avoid.
Direct sunlight or heat sourcesUndocumented temperature excursionsUsing an unverified diluentRepeated freezing and thawingMissing batch or date labellingApplying generic storage values to every peptide
FAQ
Common questions about peptide storage.
01Can peptides be frozen?
Only when the verified product specification allows it for that exact material and physical state. Lyophilised material and reconstituted solutions can have different requirements. Avoid repeated freeze-thaw cycles unless they are explicitly validated.
02How long is a peptide stable after reconstitution?
There is no reliable universal duration. Stability depends on factors including the peptide, diluent, pH, container, temperature, light protection and microbiological handling. The verified product-specific instruction is the deciding reference.
03Which water should be used for reconstitution?
Do not assume a universal answer. Use only the sterile diluent defined in the product specification or validated laboratory protocol. Bacteriostatic water may be specified in some protocols but is not a general default for every peptide.
04Does light affect stability?
For light-sensitive peptides, yes. Where specified, direct light exposure should be minimised and original or light-protective packaging should be used.
05What should happen after a temperature excursion?
Identify and segregate the material until the excursion has been assessed against the product specification. Document the decision rather than automatically releasing or discarding the material.
Important
This guide intentionally contains no product-specific storage values. For real products, storage conditions are taken only from verified manufacturer documentation, specifications or approved quality records.
Reference
WHO · Good storage and distribution practices for medical productsWHO Technical Report Series 1025 · Annex 7 · 2020
Open WHO guideline ↗