How Long Does Greek Yogurt Last? Opened vs. Unopened
FoodKeeper lists 1-2 weeks refrigerated from purchase for general yogurt. This guide applies that category reference to commercial refrigerated Greek yogurt; it is not a new allowance after opening or a tested Greek-specific safety deadline. Follow the exact package instructions and retain the purchase and temperature history.
Quick answer
FoodKeeper record 33 lists 1-2 weeks refrigerated from purchase for general yogurt. Applying it to commercial refrigerated Greek yogurt is a category reference, not a Greek-specific tested safety period or an unopened-only allowance. Keep it cold and follow any shorter product instruction.
Count all time since purchase, including storage before opening. Opening does not start a new 1-2-week allowance.
For an unopened package, follow its exact storage and date instructions. Once opened, follow its product-specific after-opening instructions. The cited FoodKeeper yogurt record does not provide a separate after-opening duration; no universal new opening period is inferred.
Retain purchase and temperature history. Opening does not reset either, and this guide does not supply an opening-date expiry countdown.
FoodKeeper lists 1-2 months for general yogurt freezer storage. Treat that as a general quality reference, not a tested Greek-specific safety deadline. Freezing cannot rescue yogurt that was already unsafe or improperly handled.
The generic freezer field does not specify an exact starting event. No automatic expiry countdown or new allowance is inferred.
Discard yogurt that needed refrigeration if it exceeded 2 hours at room temperature, or 1 hour above 90°F (32°C), including before opening. If handling is uncertain, a purchase date or normal appearance cannot establish safety. Do not taste-test suspect food.
Temperature exposure and earlier handling matter before and after opening; opening does not erase them.
Signs Greek Yogurt has gone bad
- Pink, orange, or green mold, fizzy bubbles, sharp ammonia smell.
Still good if
- Watery whey on top — stir it back in. This is normal protein-water separation, not spoilage.
Discard immediately if
- Any visible mold of any color
- Container is bloated or hisses when opened
- Greasy or oily film on top
Why guidance varies
Formulation, package instructions, purchase age and temperature history differ. The cited FoodKeeper record is for general yogurt, not a Greek-specific tested product, and it supplies no separate after-opening period. Opening does not restart the purchase clock.
Match the product state, storage conditions and source clock above. This guide does not provide an automatic expiry timer.
Frequently asked questions
How long does Greek yogurt last in the fridge?
FoodKeeper gives general yogurt a 1-2-week refrigerated reference from purchase. This is a category application to commercial refrigerated Greek yogurt, not a Greek-specific tested safety deadline. Keep it cold, follow the exact package instructions and retain earlier purchase and handling history.
How long does Greek yogurt last after opening?
The cited FoodKeeper yogurt record lists no separate after-opening period. Follow the exact product's after-opening instructions; do not treat the purchase-based 1-2 weeks as a fresh allowance after opening.
Does opening restart the purchase clock?
No. The FoodKeeper refrigerated reference starts at purchase. Opening does not erase the earlier purchase age or temperature history.
What about unopened Greek yogurt and its printed date?
Follow the unopened product's storage and date instructions and keep refrigerated yogurt cold. The general FoodKeeper purchase guide is not an unopened-only extension, and a printed date alone cannot establish safe handling.
Can Greek yogurt be frozen?
FoodKeeper lists a general yogurt freezer reference of 1-2 months. It is a quality reference, not a tested Greek-specific safety deadline; the field does not define an exact starting event. Freezing does not rescue yogurt that was already unsafe.
Can an opening date establish an expiry countdown?
This guide cannot establish a reliable expiry countdown from an opening date. The refrigerated reference is purchase-based, and no separate universal after-opening duration is provided. Follow the exact product instructions and retain the earlier history.
Sources for this answer
- A USDA FoodKeeper data - Yogurt, record 33 — General yogurt has a 1-2-week refrigerated guide from purchase, no listed after-opening period, and a generic 1-2-month freezer reference without an explicit start event.
- A FoodSafety.gov - FoodKeeper App — FoodKeeper helps maximize food freshness and quality.
- A FDA - Are You Storing Food Safely? — Refrigeration, room-temperature exposure limits and the limits of freezing as a safety measure.
- A USDA FSIS - Food Product Dating — Date-label interpretation; a date alone does not establish safe handling.