Direct answers to the questions researchers ask most often.
Most reconstituted peptides, stored refrigerated, are referenced as usable for a few weeks. The exact window varies by compound and is shortened by heat, light exposure and contamination during handling.
BPC-157 is a synthetic pentadecapeptide studied mainly for localised tissue repair and angiogenesis, while TB-500 is a Thymosin Beta-4 fragment studied for systemic cell migration via actin regulation. They're structurally unrelated but often researched together for overlapping recovery pathways.
Lyophilised (unreconstituted) peptides are generally stable refrigerated or frozen for extended periods. Once reconstituted with bacteriostatic water, most peptides should be kept refrigerated and used within a limited window.