Yes, saffron can go bad over time. Storing saffron in a cool, dry and dark place can extend its shelf life for up to 2-3 years. However, if it is not stored properly, it can lose its flavor, aroma and color and become stale or even rancid. To check if saffron has gone bad, one can smell it and see if it has a strong aroma and taste. If it has lost its fragrance and flavor, it is no longer good for consumption.
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