Milk that is nearing its expiration date is generally safe to drink, but if it has gone bad, you can no longer drink it. Milk is rich in protein (every 100ml of milk contains about 3-4g of protein), vitamins, minerals and a variety of amino acids (including the eight essential amino acids) and other nutrients. And milk protein absorption rate is high, the whey protein is very easy to digest, does not increase the burden on the stomach and intestines. Fast expiration of the milk as long as it is still within the shelf life, it is possible to drink, it is best to drink as soon as possible, do not store too long. If the milk has passed the shelf life, not only will it lose some of its nutrients, but it may also deteriorate and harbor bacteria, which may cause gastrointestinal discomforts such as diarrhea and abdominal pain after drinking it. If you feel unwell after drinking milk, you should go to the hospital for examination and treatment, and you should store milk correctly to avoid expiration or spoilage.