The cold chain is the series of steps in which chilled or frozen goods are kept at safe temperatures from production through transport, storage and delivery to the final customer. If the temperature rises at any point, quality and safety can suffer.
It relies on refrigerated transport, cool rooms, fridges and freezers, plus checks at each handover. Temperature loggers travel with shipments or sit in vehicles and storage, and staff check product temperature when a delivery arrives. Products that arrive too warm can be rejected.
Supermarkets, grocers, restaurants, cafés and caterers all depend on the cold chain for meat, seafood, dairy, produce and frozen goods. Receiving checks and continuous monitoring in store help show that the chain was maintained until the food was sold or served.
Pitfalls include leaving deliveries on a dock or in a hot car, overloaded fridges that cannot hold temperature, doors left open and equipment that is not serviced. A break is often invisible until spoilage appears, which is why logs and alerts matter.
Keeping the cold chain intact reduces food safety risk, waste and customer complaints, and is a core part of running a food business responsibly. Written procedures for what to do with out-of-range product give staff confidence to act.