FOOD STORAGE — HOW LONG CAN YOU KEEP...

• Pantry storage will allow peanut butter to spread more easily; about 3 months after opening, refrigeration is recommended to help retain flavor and prevent oil separation.
• Storage time shown is for best quality only — after that, the peanut butter's texture, color or flavor may change, but in most cases, it will still be safe to consume if it has been stored properly.
• If the peanut butter develops an off odor, flavor or appearance, it should be discarded for quality purposes.
• “Best By,” “Best if Used By,” and “Use By” dates on commercially packaged foods sold in the United States represent the manufacturer's estimate of how long the product will remain at peak quality — in most cases, the peanut butter will still be safe to consume after that date, as long as it has been stored properly and the package is not damaged.

Sources: For details about data sources used for food storage information, please click here.