Standard storage: -20°C
Most lyophilized research peptides in our catalog — BPC-157, TB-500, Semaglutide, Tirzepatide, native GLP-1, Ipamorelin, CJC-1295, Epithalon, and Selank — should be stored frozen at -20°C until ready for reconstitution. This is the storage condition listed on each compound's certificate of analysis and product page.
The refrigerated exception: GHK-Cu
GHK-Cu is the one exception in our catalog: it's stored refrigerated at 2-8°C rather than frozen. This is worth double-checking with any supplier, since incorrect storage guidance is a common, avoidable way purity degrades before material even reaches a bench.
Handling after reconstitution
Once reconstituted, minimize freeze-thaw cycles by aliquotting into single-use volumes rather than repeatedly thawing and refreezing a single stock vial. Plan reconstitution timing around your actual assay schedule — working solutions are generally less stable than the lyophilized form, so reconstituting a full vial in advance of when it's needed is one of the more common avoidable sources of degradation.