Do fermented foods need refrigeration?
Written by
Stella Nilsson
Reviewed by
Prof. Benjamin Murphy, Ph.D.In order to keep probiotic potential, a majority of fermented foods with live cultures require refrigeration. Cold storage around 34-38°F (1-3°C) slows the continued fermentation process. This continues to prevent over-acidification and preserves the number of beneficial bacteria. Shelf-stable products are processed in a way that kills off the active cultures, allowing these products to be stored safely at room temperature.
Must Refrigerate
- Products with visible bubbles or sediment indicating active cultures
- Ferments containing dairy, vegetables, or grains
- Anything labeled 'live active cultures' or 'probiotic'
Storage Duration
- Homemade ferments: 3-6 months unopened → 1-2 months after opening
- Commercial products: Follow 'best by' dates strictly
- Discard if mold appears or smells turn unpleasant
Temperature Management
- Maintain consistent refrigerator temperature
- Avoid door storage where temperatures fluctuate
- Use airtight containers to prevent contamination
Spotting active-culture products can be easy with some key indicators. Look for cloudiness in liquids or bubbles in jars. Labels reading 'unpasteurized' or 'contains live cultures' signal refrigeration is necessary. Shelf-stable alternatives typically have 'pasteurized' on the label and show no signs of fermentation activity. If you are unsure, refrigerate to preserve any potential benefits.
Take care to monitor temperature transitions during transport. Use insulated bags with ice packs when transporting refrigerated ferments to ensure proper temperature control. Minimize warm temperature exposure to no more than 30 minutes. Immediately refrigerate when you arrive home. This is the best option for bacteria viability and product integrity.
Keep in mind that refrigeration does not stop fermentation. Instead, slow bacterial action continues at this cold temperature. Gradually, over the course of months, the flavor profiles and texture will change. Consume your fermented foods within the suggested time frames to enhance flavor and maintain probiotic potency. The fermented foods are still living products and should be treated with care.
Read the full article: 10 Amazing Benefits Fermented Foods Offer
