1. Look at the date of production: check the date of production on the package, if it has expired, then the rose sauce may have been spoiled.
2. Smell: open the package and smell it, if there is an odor, it means that the rose sauce may have spoiled.
3. Look at the color: the normal color of rose hip sauce is bright, if the color becomes dull or has black spots, it may have been spoiled.
4. Taste test: Take a small amount of rose hip sauce and taste it, if it becomes sour or has a strange odor, it means it has gone bad.
If the rosehip sauce has any of the above conditions, it may have gone bad and is not recommended for consumption.