Household food waste is a substantial cost, and a meaningful share of it comes from misreading a label.
Use by
A safety date, applied to foods where consumption after the date carries risk.
Which is the label to take seriously.
It appears on items such as fresh meat, fish and ready meals where pathogen growth is the concern.
Best before
A quality date indicating when the product is at its best.
Which is not a safety date, and food remains edible afterwards in most cases.
Deterioration is generally in texture, flavour or appearance rather than safety.
Why the distinction matters
Waste studies consistently find substantial quantities of edible food discarded on best before dates.
Which represents money and resources thrown away unnecessarily.
Public campaigns and some retailers removing best before dates from produce address this directly.
Storage instructions
Dates assume the stated storage conditions.
Which means a use-by date is invalid if the item was not kept as instructed.
Once opened, instructions generally specify a shorter period regardless of the printed date.
Freezing
Freezing before the use-by date extends life substantially.
Which is the most effective single intervention for reducing household waste.
Guidance on freezing at any point up to the date has been updated in several countries.
Display until and sell by
Stock control dates for retailers rather than instructions for consumers.
Which have been removed from packaging by many retailers to reduce confusion.
Reduced items
Markdowns as dates approach.
Which is genuine value where items are used or frozen promptly.
Buying reduced food and then discarding it uneaten defeats the saving entirely.
Judgement
For best before items, sight and smell are reasonable guides.
For use by items they are not, since harmful bacteria do not necessarily change appearance or smell.
Labelling regulations
Which foods require a use-by date is defined in law rather than left to producers.
Which is why the label appears on some categories and not others.
Exemptions exist for foods where microbiological risk is negligible.
Eggs
Treated specifically in many jurisdictions with a best-before date set at a defined period after laying.
Which reflects a specific risk profile rather than general spoilage.
Storage guidance for eggs varies between countries for reasons relating to how they are processed.
Household waste data
Studies consistently identify date confusion among the largest contributors to avoidable food waste.
Which has prompted labelling simplification campaigns.
Several retailers have removed dates from fresh produce entirely.
Redistribution
Surplus food charities redistribute food past best-before dates legally.
Which is permitted precisely because those dates concern quality.
Food past a use-by date cannot legally be redistributed.
Practical habits
Freeze before the use-by date, use the older items first, and check what you have before shopping.
Storage temperature
Refrigerator temperature affects how long food lasts substantially.
Which is worth checking with a thermometer, since many domestic fridges run warmer than they should.
Recommended temperatures are published by food safety authorities.
Freezer use
Food frozen before its use-by date is safe indefinitely at proper temperature, with quality declining over months.
Which makes the freezer the most effective waste-reduction tool in a kitchen.
Labelling frozen items with contents and date prevents the unidentifiable-container problem.
Leftovers
Guidance generally specifies cooling quickly and consuming within a short number of days.
Which is separate from the original packaging date.
Reheating thoroughly is the standard advice.
Vulnerable groups
Pregnant people, young children, older adults and those with weakened immunity face higher risk.
Which means stricter adherence to dates and to storage guidance.
Specific advice for these groups is published by health authorities.
Where to check
National food safety agencies publish clear guidance, and it is freely available.
The two-word summary
Use by is safety; best before is quality.
Which is the whole distinction and accounts for a substantial share of avoidable household waste when it is confused.
Where waste actually occurs
Buying more than is used, storing badly and not planning meals.
Which are addressed by shopping to a list and checking what is already in the fridge before going.
The financial saving from this is generally larger than any discount available in store.
A closing note
Two labels, two meanings, and a substantial amount of edible food discarded because they get confused. The distinction takes ten seconds to learn and saves money every week thereafter.
Food safety authorities publish clear guidance and it is worth reading once properly.
Meal planning
Planning purchases against actual meals reduces both spending and waste.
Which is the intervention with the strongest supporting evidence.
Checking existing stock before shopping is the first half of it.
Portion sizes
Cooking to appetite rather than to packet quantities reduces leftovers that go uneaten.
Which is a straightforward and underused adjustment.
Community redistribution
Apps and schemes redistributing surplus food operate in many areas.
Which reduces waste and provides food at low cost.