- Refrigerate after opening.
- Storage time shown is for best quality only — after that, the mustard's texture, color or flavor may change, but in most cases, it will still be safe to consume if it has been kept continuously refrigerated.
- If mustard develops an off odor, flavor or appearance, it should be discarded for quality purposes; if mold appears, discard the entire product.
- “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 opened mustard will still be safe to consume after that date, as long as it has been stored properly and kept continuously refrigerated after opening.
Sources: For details about data sources used for food storage information, please click here