Expired bread is generally not eaten, so as not to endanger health. Food has a certain shelf life. Bread that has passed the shelf life usually goes bad, and may also produce toxic substances such as aflatoxin. Eating expired bread may cause abdominal distension, diarrhea, nausea and other gastrointestinal discomfort, which is harmful to human health.

In daily life, try to eat food within the shelf life. Food within the shelf life usually tastes good, does not contain special harmful substances, and generally does not affect health.