Cold Chain
Also known as: temperature-controlled shipping · refrigerated logistics
The unbroken maintenance of refrigerated temperatures during peptide storage, shipping, and handling.
Lyophilized peptides are relatively stable at room temperature for days to weeks, but reconstituted peptides and temperature-sensitive compounds (many insulin analogs, some GLP-1s in solution) degrade rapidly above refrigerator temperature. Cold chain integrity means the product stayed refrigerated from the manufacturer through the vendor's warehouse, during shipping, and into the researcher's refrigerator without an extended warm interval.
Legitimate vendors use insulated boxes with ice packs and overnight or two-day shipping. A peptide that arrives warm to the touch after 5-day ground shipping has almost certainly lost potency even if the vial looks intact.
Related Terms
Lyophilization
The process of freeze-drying a peptide to produce a stable, water-free solid powder for long-term storage.
Vial Shelf Life
The duration a peptide remains stable and potent in its current physical state (lyophilized or reconstituted).
Vendor Trust Score
A composite metric evaluating peptide vendor reliability based on COA verification, batch consistency, shipping quality, and community feedback.
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