Does yogurt go bad if it’s past its expiration date?

Yogurt can go bad after its expiration or date label, but the date alone does not always mean it is unsafe. Whether yogurt is still safe depends on how it was stored, whether it has been opened, and whether there are signs of spoilage.

If yogurt has been kept refrigerated at a safe temperature and the container is unopened, it may still be usable shortly after the date. However, it should be discarded if it smells sour in an unusual way, has mold, looks curdled beyond normal separation, has a swollen container, or tastes off.

Date labels are often about quality rather than safety. The USDA explains that a “Best if Used By/Before” date refers to best flavor or quality and is not a safety date.

How long is yogurt good past its best-by date?

Yogurt may remain good for a short time past its best-by date if it has been stored properly in the refrigerator and shows no signs of spoilage. FoodSafety.gov’s FoodKeeper tool is designed to help consumers understand food and beverage storage times and maximize freshness and quality.

As a general rule, unopened refrigerated yogurt may last longer than opened yogurt. Once opened, yogurt is more exposed to air, utensils, and possible contamination, so it should usually be eaten sooner.

Factors that affect how long yogurt lasts include:

• Refrigerator temperature
• Whether the container is opened
• Whether clean utensils were used
• Type of yogurt
• Added fruit or toppings
• Packaging condition

If there is any doubt, especially with an opened container, it is safer to throw it away.

What happens if you eat expired yogurt?

Eating expired yogurt does not always make you sick, especially if it was properly refrigerated and has no spoilage signs. However, spoiled or contaminated yogurt can cause foodborne illness.

Possible symptoms may include:

• Nausea
• Vomiting
• Diarrhea
• Stomach cramps
• Fever
• General stomach upset

Foodborne illness can be caused by harmful germs or toxins in contaminated food. CDC lists diarrhea, stomach pain or cramps, nausea, vomiting, and fever as common food poisoning symptoms.

How quickly do symptoms appear after eating spoiled yogurt?

Symptoms after eating spoiled yogurt may appear within a few hours or may take days, depending on the germ involved, the amount eaten, and the person’s overall health. Some foodborne illnesses develop quickly, while others have a longer incubation period.

Mayo Clinic notes that food poisoning symptoms most often start within hours or days after eating contaminated food.

Seek medical advice if symptoms are severe, if diarrhea lasts more than a few days, or if vomiting prevents you from keeping fluids down.

Is out-of-date yogurt safe to eat?

Out-of-date yogurt may be safe to eat if it has been stored correctly, remains sealed or has been handled carefully, and shows no signs of spoilage. However, this does not apply if the yogurt has been left out too long, smells bad, has visible mold, or has an unusual texture.

Before eating out-of-date yogurt, check for:

• Mold
• Swollen or leaking packaging
• Strong unpleasant odor
• Unusual discoloration
• Excessive curdling
• Fizzy or fermented taste
• Slimy texture

People who are pregnant, older adults, young children, or immunocompromised should be more cautious with expired refrigerated foods. FoodSafety.gov advises pregnant people to consume only pasteurized milk products, including yogurt, to reduce the risk of foodborne illness.

What’s the difference between “Best If Used By/Before” and “Use-By” dates on yogurt containers?

“Best If Used By/Before” usually refers to quality. It tells you when the product is expected to have the best flavor, texture, and freshness. It does not automatically mean the food becomes unsafe the next day.

A “Use-By” date is also commonly used by manufacturers to indicate the last date recommended for peak quality. For most foods, date labels are not federally required, except for infant formula. USDA guidance explains that “Best if Used By/Before” is about best flavor or quality, not safety.

For yogurt, safe handling matters as much as the date. Refrigeration, clean utensils, and avoiding long room-temperature exposure are essential.

Can you get food poisoning from yogurt?

Yes, yogurt can cause food poisoning if it is contaminated with harmful bacteria, improperly stored, made with unpasteurized milk, or eaten after spoilage has developed. Opened containers are more vulnerable because they can be contaminated by air, dirty spoons, or repeated handling.

Higher-risk situations include:

• Yogurt left at room temperature too long
• Damaged packaging
• Mold growth
• Unpasteurized yogurt
• Cross-contamination from utensils
• Eating from the container repeatedly

FoodSafety.gov warns that raw milk products may contain harmful bacteria such as Campylobacter, E. coli, Listeria, Salmonella, or the bacteria that causes tuberculosis.

How long after eating expired yogurt will you get sick?

If expired yogurt is contaminated, symptoms can appear within hours or may take several days. The timing depends on the type of bacteria or toxin involved.

Some people may only have mild stomach upset, while others may develop more intense vomiting, diarrhea, fever, or dehydration. CDC notes that symptoms depend on the germ swallowed and that severe food poisoning can include bloody diarrhea, diarrhea lasting more than three days, fever over 102°F, frequent vomiting, and dehydration.

Medical attention is important if symptoms are severe, persistent, or occur in someone at higher risk.

What are the symptoms of food poisoning from yogurt?

Food poisoning from yogurt can cause digestive symptoms similar to other foodborne illnesses. The most common symptoms involve the stomach and intestines.

Possible symptoms include:

• Nausea
• Vomiting
• Diarrhea
• Stomach cramps
• Fever
• Chills
• Weakness
• Dehydration

Seek medical care if you develop bloody diarrhea, high fever, repeated vomiting, signs of dehydration, severe abdominal pain, or symptoms that do not improve. CDC advises medical care for severe symptoms such as bloody diarrhea, diarrhea lasting more than three days, fever over 102°F, vomiting so often that fluids cannot be kept down, or signs of dehydration.