Opened Greek yogurt will last for one to two weeks in the refrigerator, according to the USDA. This assumes the yogurt is kept at a safe temperature of 40 degrees Fahrenheit or colder.
Understanding Greek Yogurt Shelf Life
It's important to understand that the shelf life of Greek yogurt is affected by whether it has been opened or not.
Here is a breakdown:
- Unopened Greek Yogurt: Unopened containers of Greek yogurt typically have a "use-by" date printed on the packaging. If stored correctly, this is the period during which the yogurt is considered to be of the highest quality.
- Opened Greek Yogurt: Once opened, the clock starts ticking, and even if it's before the 'use-by' date, the yogurt's freshness and safety are limited.
Factors Affecting Shelf Life
Several factors impact the lifespan of Greek yogurt, even when it is stored correctly.
- Temperature: Maintaining the recommended temperature of 40 degrees Fahrenheit (or colder) is crucial. Any fluctuations in temperature can speed up spoilage.
- Contamination: The presence of bacteria or other contaminants will accelerate spoilage. Always use a clean spoon when serving, and reseal the container properly after each use.
- Air Exposure: Exposure to air can also reduce the shelf life, so it is best to keep the container sealed as tightly as possible.
How to Know if Greek Yogurt Has Gone Bad
It is important to check your yogurt before consuming it, even if it has been within the stated timeframe, here are some things to look for:
- Appearance: Discard if you see mold, discoloration, or excessive liquid separation.
- Smell: A sour or off odor is a clear indication of spoilage.
- Taste: If you suspect the yogurt might be bad, taste a very small amount. If it tastes overly sour or "off," it has gone bad.
Practical Tips
- Storage: Store Greek yogurt in the coldest part of your refrigerator, which is usually at the back of the shelf, near the bottom.
- Portioning: If you have a large container, consider portioning out smaller amounts into clean, sealed containers to minimize contamination.
- Marking Date: Write the date you opened the container on its lid, so you can easily keep track of how long it's been open.
Summary
| Yogurt Status | Storage Time |
|---|---|
| Unopened | Until 'use-by' date on pack |
| Opened | 1-2 weeks in the fridge |
