Foods You Should Never Eat Past Their Expiration Date, According to Food Safety Experts
Meta Title: Foods You Should Never Eat Past Their Expiration Date | Food Safety Guide
Meta Description: Learn which foods should never be eaten past their expiration date, why proper storage matters, and how to reduce your risk of foodborne illness with expert-backed food safety tips.
Foods You Should Never Eat Past Their Expiration Date, According to Food Safety Experts
We've all been there. You open the refrigerator, spot a container tucked behind the leftovers, and wonder whether it's still safe to eat. Maybe it's shredded cheese that's been sitting there for weeks, a carton of yogurt that's just passed its date, or a package of deli meat you forgot to finish.
Throwing away perfectly good food feels wasteful, but eating spoiled food can have far more serious consequences than wasting a few dollars. Foodborne illnesses caused by harmful bacteria such as Salmonella, Listeria, and E. coli affect millions of people every year, leading to symptoms ranging from mild stomach discomfort to severe infections that require hospitalization.
One of the biggest misconceptions about food safety is believing that every date printed on food packaging is an actual "expiration date." In reality, most labels are intended to indicate product quality rather than safety.
So how do you know when food is still safe—and when it belongs in the trash?
Here's what food safety experts and registered dietitians recommend.
Understanding Food Date Labels
Before deciding whether to keep or toss food, it's important to understand what the dates actually mean.
Many packages include labels such as:
Best By
Best If Used By
Sell By
Use By
Contrary to popular belief, these dates usually do not indicate when food suddenly becomes unsafe.
Instead, they generally tell retailers and consumers when the product is expected to have its best flavor, texture, and quality under proper storage conditions.
The exception is infant formula, which has federally regulated expiration dates that should always be followed.
For most other foods, safety depends on several factors, including storage temperature, packaging integrity, and how the food has been handled.
Why Refrigeration Matters
Keeping food cold is one of the easiest ways to reduce bacterial growth.
However, refrigeration does not kill bacteria.
Instead, cold temperatures simply slow down the growth of microorganisms.
That's why foods left at room temperature for extended periods can become unsafe even if they haven't reached the printed date.
Experts recommend keeping your refrigerator at 40°F (4°C) or below and your freezer at 0°F (-18°C).
Using an inexpensive refrigerator thermometer can help ensure your appliance stays within a safe temperature range.
Foods You Should Never Eat Past Their Safe Storage Time
Some foods become risky much faster than others.
These are among the products experts recommend handling with extra care.
1. Shredded Cheese
Pre-shredded cheese often contains anti-caking agents that help prevent clumping, but once the package is opened, moisture and air create ideal conditions for mold growth.
If you notice mold on shredded cheese, it's safest to throw away the entire package.
Unlike hard cheese blocks, mold can spread through loose shredded pieces, making it impossible to know which parts are contaminated.
Generally:
Unopened packages may remain good for about a week beyond the sell-by date if continuously refrigerated.
Once opened, use within several days according to package instructions.
2. Cream Cheese, Cottage Cheese, and Ricotta
Soft cheeses contain much more moisture than hard cheeses.
That moisture allows bacteria to multiply more easily.
These dairy products should never be eaten if they develop:
Mold
Sour odors
Slimy texture
Unusual discoloration
Because harmful bacteria may spread throughout soft cheeses, simply removing the moldy portion is not considered safe.
Discard the entire container if spoilage appears.
3. Deli Meat
Sliced turkey, ham, roast beef, and other deli meats are especially vulnerable to bacterial contamination after opening.
They should generally be eaten within:
Even if the package still looks normal, harmful bacteria like Listeria monocytogenes may grow without causing noticeable changes in smell or appearance.
Pregnant women, older adults, and people with weakened immune systems should be especially cautious.
4. Raw Ground Meat
Ground beef, turkey, chicken, and pork spoil much faster than whole cuts because grinding distributes bacteria throughout the meat.
Raw ground meat should usually be cooked or frozen within:
If it develops:
throw it away immediately.
5. Raw Poultry
Chicken and turkey can carry bacteria including Salmonella and Campylobacter.
Even if refrigerated, raw poultry should generally be cooked within:
Never rely on smell alone.
Dangerous bacteria don't always produce noticeable odors.
6. Seafood
Fresh fish is highly perishable.
Many varieties should be cooked within:
Signs of spoilage include:
When in doubt, throw it out.
7. Raw Eggs with Cracked Shells
Eggs are naturally protected by their shells.
However, once cracked, bacteria can enter much more easily.
Discard eggs that have:
Whole refrigerated eggs generally remain safe for several weeks when stored properly, but cracked eggs should not be kept.
8. Bagged Salads
Pre-washed salad mixes contain moisture that encourages bacterial growth.
Discard bagged greens if you notice:
Sliminess
Brown or black leaves
Unpleasant odor
Excess liquid
Even if only a portion appears spoiled, contamination may spread throughout the bag.
9. Fresh Sprouts
Alfalfa, bean, broccoli, and clover sprouts have been associated with foodborne illness outbreaks because bacteria can grow during the warm, humid sprouting process.
Anyone at high risk—including pregnant women, young children, older adults, and immunocompromised individuals—may wish to avoid raw sprouts entirely.
10. Leftovers
Many people keep leftovers far longer than recommended.
Most cooked leftovers should be eaten within:
After that, bacteria may multiply even under refrigeration.
Labeling containers with the preparation date can help prevent forgotten meals from lingering in the refrigerator.
11. Fresh Milk
Milk doesn't always spoil exactly on the printed date.
However, discard it if it develops:
Sour smell
Curdled appearance
Thick texture
Unusual taste
Always return milk to the refrigerator promptly after use.
12. Yogurt
Unopened yogurt often lasts a little beyond its printed date if refrigerated continuously.
Once opened:
Discard yogurt that develops:
13. Fresh Juice
Unpasteurized juice spoils much faster than pasteurized varieties.
Discard juice if it develops:
Fermented smell
Bubbling
Mold
Off taste
Always keep refrigerated.
Foods That May Last Longer Than You Think
Not every food needs to be discarded immediately after the printed date.
Some foods often remain safe beyond their quality date when stored properly.
Examples include:
These foods generally have low moisture levels that make bacterial growth less likely.
Still, inspect packaging for damage before consuming.
Signs Food Has Gone Bad
Regardless of the printed date, discard food if you notice:
Mold
Slimy texture
Sour smell
Gas buildup
Leaking packages
Swollen cans
Strange discoloration
Fermentation
Unexpected taste
Remember that some dangerous bacteria don't produce obvious warning signs.
That's why proper storage times remain important.
How to Make Food Last Longer
Following a few simple habits can reduce waste while improving food safety.
Keep Your Refrigerator Cold
Maintain a temperature of:
Use a refrigerator thermometer rather than guessing.
Freeze Foods You Won't Use Soon
If you won't cook meat or poultry within a day or two, freeze it promptly.
Freezing preserves quality while preventing bacterial growth.
Store Raw Meat Properly
Keep raw meat on the lowest shelf to prevent juices from dripping onto ready-to-eat foods.
Practice First In, First Out
Move older products to the front of the refrigerator.
Place newly purchased items behind them.
This simple habit reduces forgotten food.
Don't Leave Food Out Too Long
Perishable foods should not remain at room temperature for more than:
If temperatures exceed 90°F (32°C), reduce that to one hour.
Wash Your Hands
Proper handwashing before preparing food reduces cross-contamination.
Wash with soap and water for at least 20 seconds.
Common Food Safety Myths
Myth 1: If It Smells Fine, It's Safe
False.
Some dangerous bacteria produce no noticeable odor.
Myth 2: Cutting Off Mold Makes Food Safe
Only certain hard cheeses may sometimes be safely trimmed.
Soft cheeses, shredded cheese, bread, yogurt, and leftovers should usually be discarded if mold appears.
Myth 3: Freezing Kills All Bacteria
Freezing stops bacterial growth but doesn't eliminate all microorganisms.
Once thawed, surviving bacteria can begin multiplying again.
Myth 4: Sell-By Dates Are Expiration Dates
Sell-by dates primarily help stores manage inventory.
They are not always indicators of food safety.
Who Should Be Extra Careful?
Some individuals face a much higher risk of serious complications from foodborne illness.
These include:
Pregnant women
Infants
Young children
Adults over 65
People with weakened immune systems
Individuals undergoing chemotherapy
Organ transplant recipients
These groups should be especially cautious with refrigerated ready-to-eat foods, unpasteurized dairy products, raw seafood, and undercooked meats.
The Bottom Line
Food date labels can be confusing, but they don't always tell the whole story. While many "best by" or "sell by" dates relate to quality rather than safety, some foods become unsafe quickly once opened or improperly stored.
High-moisture, perishable foods such as shredded cheese, soft cheeses, deli meats, raw poultry, seafood, and leftovers deserve extra attention because they can support the growth of harmful bacteria even before obvious signs of spoilage appear.
When in doubt, remember this simple food safety rule: If a perishable food has been stored improperly, kept too long, or shows signs of spoilage, it's safer to throw it away than risk foodborne illness.
Disclaimer: This article is for informational purposes only and is not a substitute for professional medical or food safety advice. Storage times are general guidelines and may vary depending on the product, packaging, and storage conditions. Always follow the manufacturer's instructions and consult your local food safety authority if you have specific questions.
