TeamPeptide storage — fridge, freezer, or room temperature?

The rules that matter, without the folklore: Lyophilized (powder, unopened) - Short term (weeks): a cool, dark drawer is fine — this is why shipping without cold packs is normal. - Longer term: refrigerate (2–8°C). For many months to years, freeze (-20°C). Keep vials in the box or a bag — light and moisture are the enemies. Reconstituted (after adding BAC water) - Always refrigerate (2–8°C). With bacteriostatic water, several weeks of refrigerated use is the common standard in research settings. - Do NOT freeze reconstituted peptides — freeze-thaw cycles degrade them. - Label the vial with the date and concentration the moment you reconstitute. Future you will not remember. Compound-specific notes: GLP-1 class compounds (semaglutide, tirzepatide, retatrutide) are generally stable but still follow the same rules; NAD+ and copper peptides (GHK-Cu) are best used on the quicker end. When in doubt, mix smaller amounts more often — vials are cheap relative to a degraded batch (peptidepub.com/prices if you need to restock).