How Long Does Kefir Last?
Quick Answer
Kefir lasts 2-3 weeks when unopened. Once opened, it should be used within 5-7 days.
Shelf Life by Storage Condition
| Storage Condition | Duration |
|---|---|
| Pantry (Unopened) | Not applicable |
| Pantry (Opened) | Not applicable |
| Refrigerator (Unopened) | 2-3 weeks |
| Refrigerator (Opened) | 5-7 days |
| Freezer | 1-2 months |
How to Tell If It Has Gone Bad
- Sour or off smell stronger than usual
- Separation of liquid and curd with unusual color
- Mold growth on the surface
- Bitter or unpleasant taste
Proper Storage Tips
- Keep kefir refrigerated at or below 40°F (4°C) at all times
- Seal container tightly after each use to prevent contamination
- Do not leave kefir at room temperature for extended periods
Risks of Using Expired Kefir
Consuming expired kefir can lead to foodborne illness due to the growth of harmful bacteria or mold. Symptoms may include stomach cramps, nausea, vomiting, and diarrhea. Individuals with weakened immune systems should be especially cautious.
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Frequently Asked Questions
How long does Kefir last?
Unopened kefir lasts 2-3 weeks refrigerated, and once opened, it should be consumed within 5-7 days.
Does Kefir expire?
Yes, kefir does expire and should be consumed before the 'use by' or 'best by' date on the package.
How can you tell if Kefir has gone bad?
Signs of spoiled kefir include a strong sour or off smell, mold growth, unusual separation or color, and a bitter or unpleasant taste.