Does Kimchi Go Bad? - Healthline

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HealthlineSubscribeNutritionNutritionEvidence BasedHow Long Does Kimchi Last? Plus, How to Tell When It Goes Bad

Medically reviewed by Amy Richter, MS, RD — Written by Lisa Wartenberg, MFA, RD, LD — Updated on December 5, 2025

Signs of spoilage
Risks
Storage tips
Takeaway

Kimchi is naturally sour and pungent. As long as you don’t see mold or notice any foul odors, your kimchi should be safe to eat. That said, if you’re ever in doubt, throw it out.

Kimchi is a tangy Korean staple made by fermenting vegetables like napa cabbage, ginger, and peppers in a seasoned brine.

At room temperature, opened kimchi lasts one week. When properly refrigerated, it can last three to six months. It continues to ferment over time, becoming sourer and softer.

If you prefer a milder flavor or crunchier texture, you may want to discard your kimchi after 3 months. After this point, its taste may change significantly.

If you don’t want to throw it away but dislike the sourness, try mixing it into dishes like fried rice or stew to mellow out its flavor.

Kimchi may be safe to eat for up to 6 months after it’s opened, as long as there is no mold, which indicates spoilage.

How to tell if kimchi has gone bad

While good-to-eat kimchi is naturally pungent, spoiled kimchi may smell more sour than usual or like alcohol.

Mold typically prefers warmer temperatures, but can grow in refrigerated food as it ages, especially if it has been improperly stored. It forms a fuzzy mass or small dots and ranges in color from black to blue to green.

Mold is dangerous because it not only rots food but also may harbor bacteria that cause food poisoning or allergic reactions. If you see mold on your kimchi, refrain from smelling it — as inhaling its spores may trigger respiratory distress.

If your kimchi contains seafood like oysters or fermented fish (jeotgal), check it more carefully, as it may be more likely to have high histamine levels that can cause food poisoning.

While vegan and non-vegan kimchi may age similarly due to a comparable makeup of friendly bacteria, further studies are needed.

If you’re ever unsure whether your kimchi is still good, it’s safest to trash it.

Quick inspection

Appearance: Check for gray, green, or white fuzzy spots of mold or cloudy, discolored brine.
Smell: Kimchi usually smells sour, but when it spoils, it may be more pungent or smell rotten.
Texture: Freshly fermented vegetables are often firm. Soft, mushy, or slimy vegetables are spoiled.
Taste: If it looks and smells safe to eat, try a tiny bite. If it tastes bitter or heavily fizzes, discard it.

Side effects and risks of eating bad kimchi

Eating spoiled kimchi may lead to foodborne illness. The mycotoxins in mold, in particular, may cause nausea, diarrhea, and vomiting. People with weakened immune systems are especially susceptible.

Furthermore, if your dish contains spoiled seafood, it may cause botulism, paralytic shellfish poisoning, or anisakis infections. These conditions are characterized by nausea, vomiting, respiratory distress, and even bowel blockage and bleeding.

Kimchi can also be spoiled by harmful bacteria from your hands or any utensils used during the preparation process.

Thus, you should always wash ingredients thoroughly and practice proper food preparation techniques if you make kimchi on your own. If you prefer to buy it premade, make sure to purchase it from a seller you trust.

How to prevent kimchi from spoiling

Store-bought kimchi should always be stored in the refrigerator.

If you’re making your own kimchi, you can leave it on the counter at room temperature for a few days during the initial fermentation. After that, it should be stored in the fridge to keep it fresh.

A good rule of thumb is to ensure that all of its ingredients are entirely submerged in the brine before you reseal it.

Use clean utensils anytime you handle kimchi in its container. Used or dirty utensils may introduce unwanted bacteria that can cause spoilage.

Avoid constantly opening and closing the container. Exposure to air may attract undesirable organisms that can also spoil your kimchi.

If you have a large jar of kimchi, it may be preferable to transfer portions, such as a week’s worth, into smaller containers as you go. This will help preserve it.

Quick tips

Refrigerate: Store-bought kimchi must be kept in the fridge before and after opening.
Scoop: Always handle kimchi with clean utensils.
Seal: Use a glass jar or other airtight container and limit how often you open and close it.
Submerge: Lightly shake the jar to ensure that all the ingredients are submerged in brine.

The bottom line

Kimchi is seasoned, fermented napa cabbage popular in Korean cuisine. When prepared properly and refrigerated, it can last up to 6 months. Nonetheless, you should never eat kimchi that smells off or has visible mold.

If you’re ever unsure whether your dish is safe to eat, it’s best to toss it out.

How we reviewed this article:

SourcesHistoryHealthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.

Choi Y, et al. (2020). Quantitative microbial risk assessment for Clostridium perfringens foodborne illness following consumption of kimchi in South Korea.https://pmc.ncbi.nlm.nih.gov/articles/PMC7347736/
Jung MY, et al. (2018). Role of jeotgal, a Korean traditional fermented fish sauce, in microbial dynamics and metabolite profiles during kimchi fermentation.https://pubmed.ncbi.nlm.nih.gov/29884364/
Park YK, et al. (2019). Occurrence and reduction of biogenic amines in kimchi and Korean fermented seafood products.https://pmc.ncbi.nlm.nih.gov/articles/PMC6915361/
Ribes S, et al. (2018). Prevention of fungal spoilage in food products using natural compounds: A review.https://pubmed.ncbi.nlm.nih.gov/28394635/
Sivamaruthi BS, et al. (2018). Toxins in fermented foods: Prevalence and preventions-A mini review.https://pubmed.ncbi.nlm.nih.gov/30586849/
Zabat MA, et al. (2018). The impact of vegan production on the kimchi microbiome.https://pubmed.ncbi.nlm.nih.gov/29706333/

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Evidence Based

This article is based on scientific evidence, written by experts and fact checked by experts.

Our team of licensed nutritionists and dietitians strive to be objective, unbiased, honest and to present both sides of the argument.

This article contains scientific references. The numbers in the parentheses (1, 2, 3) are clickable links to peer-reviewed scientific papers.

Medically reviewed by Amy Richter, MS, RD — Written by Lisa Wartenberg, MFA, RD, LD — Updated on December 5, 2025

Does Kimchi Go Bad? - Healthline

How to tell if kimchi has gone bad

Quick inspection

Side effects and risks of eating bad kimchi

How to prevent kimchi from spoiling

Quick tips

The bottom line

How we reviewed this article:

Evidence Based

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