For the complete shelf-life discussion by peptide, see BPC-157 Storage Temperature and Shelf Life and Peptide Storage Guide
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Wen C, Xu L, Xu X, Wang D, Liang Y, Duan L
RAI analogs (lispro, aspart, or glulisine) are preferred over regular human insulin because they have a more rapid onset and shorter duration of action, making them better suited for controlling PPG, and are associated with less hypoglycemia [18, 19]
However, the bodys naturally produced GLP-1 has a very short half-life, lasting only a few minutes before it is rapidly broken down by an enzyme called dipeptidyl peptidase-4 (DPP-4)