Lyophilized Epithalon powder remains stable for 24-36 months when stored at -20 degrees Celsius (freezer) or 12-18 months refrigerated at 2-8 degrees Celsius. Once reconstituted with bacteriostatic water, stability decreases to 30-45 days under refrigeration at 2-8 degrees Celsius. Avoid multiple freeze-thaw cycles which cause peptide degradation, and protect from light exposure using amber vials when possible.
PMC: Peptide stability data