Use by is a safety deadline
In EU food labelling, a use-by date applies to foods that are highly perishable and can become unsafe quickly. Do not rely on smell, colour or a taste test after a use-by date: harmful bacteria may be present without obvious signs. Follow the label's storage conditions.
Best before concerns quality
Best-before labels indicate the time until which a properly stored product is expected to retain its usual quality. Some products may remain suitable afterwards if packaging, storage history and the type of product allow it. That does not mean damaged or badly stored food should be eaten.
Opening a package changes the rules
Once a package is opened, instructions such as consume within two days may apply even if the printed date is much later. Keep cold foods at the temperature specified on the label and avoid leaving perishables warm for hours. Freezing and thawing also require product-specific guidance.
Reduce waste without gambling with health
Plan meals, rotate older foods forward and check portions before shopping. Distinguish a quality date from a safety date but never ignore a true use-by limit. EU and non-EU countries may use different date terminology, so read local labels rather than assuming an American rule applies.
A general educational overview, not a substitute for professional guidance. Check current local rules and trusted primary sources before making consequential decisions.
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