Cold-Chain Logistics for Temperature-Sensitive Compounds

Lyophilized Peptides Are More Transit-Tolerant Than Assumed

A common misconception is that a peptide needs refrigeration from the moment it leaves the lab until the moment it arrives. In lyophilized (freeze-dried) form, most research peptides are considerably more stable at ambient temperature for short durations than their reconstituted liquid form is. The degradation pathways that matter in solution are largely inactive in a dry, moisture-minimized powder. That’s precisely why compounds ship lyophilized rather than pre-dissolved in the first place.

Why We Don’t Ship Refrigerated

Aether Laboratories does not use refrigerated cold-chain shipping. No insulated liners, no gel ice packs. That’s a deliberate choice grounded in the stability science above, not an oversight: dedicated cold-chain infrastructure targets a degradation risk that doesn’t meaningfully apply to a lyophilized sample within a normal transit window. Building that infrastructure in anyway would add cost and complexity without a corresponding stability benefit for the product actually being shipped.

What Actually Protects the Shipment

On Arrival

Open and inspect a shipment promptly on arrival rather than letting it sit unopened. If a vial arrives with a broken or compromised seal, visible damage, or any sign of moisture intrusion, note it and reach out through our contact terminal. See our Shipping Policy for the full process.