Do peptides expire?

Yes. They break down with heat, damp, light, and time. This site already covers storage on /faq, under storing unmixed peptides and shelf life after mixing, instead of printing one expiry date for every vial. Freeze-dried powder kept cold, dark, and dry is described there as lasting roughly 12 to 24 months in the fridge, or longer frozen. Once mixed with bacteriostatic water and kept in the fridge, the usual window on those pages is about 28 to 30 days. That limit comes from the preservative, not from a set chemical clock for every peptide. A seller's date stamp is not a stability test we hold. This FAQ does not invent a new expiry number beyond those storage answers.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of research peptides, the category. What research peptides are, legally and practically, before getting into specific compounds.