Best Before vs. Use By: What Food Date Labels Really Mean
Food date labels confuse almost everyone. “Best before”, “use by”, “sell by”, “best if used by” — they sound interchangeable, but they mean very different things. Getting them mixed up leads to two costly mistakes: throwing away food that was perfectly fine, or eating something that was genuinely unsafe.
Here is the clear version.
The One Distinction That Matters
There are really only two ideas hiding behind all those labels:
- Best before = quality. After this date, food may be past its peak — a little stale, less crisp, slightly faded in flavor — but it is generally still safe to eat.
- Use by = safety. This is the date after which perishable, higher-risk food should not be eaten, even if it looks and smells fine.
If you remember nothing else, remember that: best before is about how good it is; use by is about whether it’s safe.
Best Before, Explained
You will find best before dates on shelf-stable and lower-risk foods: pasta, rice, canned goods, crackers, cookies, frozen food, oils, and many condiments.
These dates are the manufacturer’s estimate of how long the product stays at its best quality. A can of beans a month past its best before date is not dangerous — it may just be slightly softer or less flavorful. Dry pasta can be fine long after the printed date if it has been stored properly.
For these foods, use your judgment. Check for off smells, mold, an unusual taste, or a change in texture. If everything seems right, it usually is. The best before date is guidance, not a hard stop.
Use By, Explained
Use by dates appear on perishable, higher-risk foods: fresh meat and poultry, fish, ready-to-eat meals, soft cheeses, and prepared salads. These are foods where harmful bacteria can grow to dangerous levels without changing how the food looks, smells, or tastes.
This is the critical part: you cannot rely on your senses with a use by date. Food past its use by date can be unsafe even when it seems perfectly normal. For these items, once the date has passed, throw it out — freezing before the date is the safe way to extend it.
What About “Sell By” and “Best If Used By”?
- Sell by is a stock-rotation date for the store, not for you. It tells the retailer when to pull the item from the shelf. Food is typically still good for some time after a sell by date if stored correctly.
- Best if used by is a quality phrasing, similar to best before.
Labeling also varies by country. In the UK and EU, “use by” (safety) and “best before” (quality) are clearly defined and regulated. In the US, date labels are far less standardized — most are quality indicators set by the manufacturer, not safety rules — which is exactly why so much edible food gets thrown away. When in doubt on a perishable item, treat the strictest interpretation as the safe one.
When It’s Safe to Eat Past the Date — and When It Isn’t
A simple rule of thumb:
- Shelf-stable food past its best before date: usually fine. Inspect it, trust your senses, use common sense.
- Perishable food past its use by date: do not eat it. This is the line you do not cross.
Freezing is your best friend here. Freezing food before its use by date effectively pauses the clock, so a use by date is really a “use or freeze by” date.
How to Waste Less Food
Food waste is a genuinely large problem. According to the UN Environment Programme’s Food Waste Index Report, a substantial share of the world’s food waste happens in households — not just in shops and restaurants — which means everyday habits at home make a real difference.
The good news: a few small habits cut most of it.
- Shop your kitchen first. Check what you already have before buying more. Half of household waste is simply food we forgot we owned.
- Plan around what expires soonest. Cook the items closest to their date first — “eat me first” beats “eat me whenever”.
- Store food properly. Correct temperature and sealing extend both best before and use by windows.
- Freeze before the date. If you will not get to something in time, freeze it while it is still good.
- Keep track of what you have. You cannot use what you have forgotten about. This is the single biggest lever, and it is the hardest to do from memory alone.
Where Expiroo Fits In
That last habit — keeping track — is exactly what our app Expiroo was built for. It is a food expiry tracker for your fridge and pantry: add products (scan a barcode to fill them in fast), and Expiroo reminds you at 7, 3, 1, and 0 days before something expires, with a traffic-light view so you can see at a glance what to use first.
It is local-first — your inventory stays on your device — and works offline with no account. Like most free apps, Expiroo shows ads and uses analytics/crash reporting (standard advertising and diagnostic identifiers). What stays local is your inventory.
Expiroo is currently in closed beta on Google Play with limited spots. To try it, follow these steps in order: join the testers group, open the opt-in link, then install it from Google Play. You can also read more about Expiroo first.
FAQ
What’s the difference between best before and use by?
A best before date is about quality — food may lose flavor or texture after it, but is usually still safe to eat. A use by date is about safety — do not eat high-risk foods after their use by date, even if they look and smell fine.
Can I eat food after the best before date?
Usually yes, for shelf-stable foods like pasta, canned goods, or crackers. Best before is a quality guide, not a safety cutoff. Check for off smells, taste, or texture, and trust your senses — but never apply this logic to a use by date.
Is use by the same as expiration date?
For practical purposes, yes. Use by is the safety-based expiration date on perishable, higher-risk foods like fresh meat, fish, and ready-to-eat items. After it, the food should be thrown out rather than eaten.
How can I stop wasting food?
Plan meals around what expires soonest, store food correctly, freeze items before their date, and keep track of what you have. A tracker like Expiroo reminds you before food goes bad so you can use it in time.
Learn the two words, apply the two rules, and you will throw away far less food while staying on the safe side of the line that actually matters.