Why Does Food Last Longer in the Fridge? The Science of Cold
How cold slows bacterial growth, the right fridge and freezer temperatures, and the mistakes that still let food spoil.
Why This Guide Matters
Step-by-step Implementation:
Bacteria and temperature
Food spoils mainly because bacteria and molds multiply. They grow fastest between about 5°C and 60°C, the so-called danger zone. Cold slows their metabolism.
A fridge slows bacteria, it does not kill them
Keep the fridge at 4°C or below and the freezer at −18°C. Growth slows but does not stop; some germs, such as Listeria, can still grow slowly in the cold.
Rules for keeping food safe
Do not leave cooked food out for more than two hours (one hour in hot weather). Do not overpack the fridge; cold air must circulate. Store raw meat covered on the bottom shelf so juices cannot drip onto other food.
Sifat Phychee
Lead Researcher & FounderSoftware Engineer, Science Researcher & Creator. Architecting actionable blueprints bridging neuroscience, cellular biology, and modern full-stack web engineering.
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