Expired yogurt should not be consumed. Yogurt is a fermented dairy product, which contains a lot of probiotics. If yogurt is expired, first of all, the taste will change. The activity of bifidobacteria, Lactobacillus acidophilus and other flora will decline, and may also breed bacteria such as Staphylococcus aureus, which is not conducive to health. Therefore, expired yogurt can not be consumed. In addition, besides expired yogurt, other expired foods should not be consumed. It is recommended that when purchasing yogurt and other dairy products, you should pay attention to the shelf life of the product and drink it within the shelf life, in addition, it should be stored at the right temperature to avoid spoilage. In your daily life, you should pay attention to dietary hygiene to avoid affecting your health.