Theoretically, yeast powder cannot be used after it has expired, but usually the shelf life of products given by manufacturers is a reduced estimate, which means that sometimes yeast powder will appear to have expired. But it hasn't deteriorated yet. If this happens and the yeast powder has only expired for a few days or so, it can still be used. But if it has expired for several months, it is best not to use it regardless of whether it has obviously deteriorated.

Precautions for using yeast powder

However, it should be noted that it does not mean that yeast powder can always be used within the shelf life. Sometimes during the shelf life, yeast powder will deteriorate due to improper storage methods. Therefore, when we use yeast powder within the shelf life, we should also pay attention to distinguish whether it has deteriorated.