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How to Tell If Bacon Is Bad?
Updated Food Storage & Safety
Signs to check, in order of reliability
| Sign | What it means |
|---|---|
| Sour, sharp, or ammonia-like smell | The clearest sign — fresh bacon should smell mild and meaty, not sharp or sour |
| Grey or greenish colour | Fresh bacon is pink/red with white fat; a dull grey or greenish tinge signals spoilage |
| Slimy or sticky surface | A tacky film is a sign of bacterial growth |
| Mold (fuzzy spots, any colour) | Discard immediately, no partial trimming |
| Torn or leaking packaging | Not spoilage itself, but a risk factor — inspect closely |
Sell-by vs. use-by, and why the date alone isn't the answer: a sell-by date is for the retailer's stock rotation, not a safety cutoff — unopened bacon is often still fine for a short while after it passes. A use-by date is a stronger signal, but bacon that's visibly, smells, or feels off should be discarded regardless of any printed date, and bacon within its dates can still spoil early if it wasn't stored cold enough.
Storage windows
| State | Fridge | Freezer |
|---|---|---|
| Unopened package | 1–2 weeks (check the date) | 1 month |
| Opened package | 1 week | 1 month |
| Cooked bacon | 4–5 days | 1 month |
A caution on taste-testing: don't cook a suspicious piece "just to check" — the bacteria responsible for the smell and texture changes aren't reliably killed at normal cooking temperatures, and a spoiled piece cooked and eaten can still cause food poisoning.
The closest sibling pages are Can You Freeze Garlic Cloves? and How Long Do Apples Last in the Fridge?.
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Sources
- USDA — Bacon and Food Safety — fsis.usda.gov