Generally speaking, adults should drink 400 ~ 500ml, that is, two bottles (two bags) of milk a day, but at least 250ml, that is, one bottle (one bag) of milk. Economic conditions permit the best three bottles (three bags), that is, about 750 ml, but it is best not to exceed 1000 ml. Milk is a basic food for people, and it is generally advisable to drink it after meals for three meals a day.
It is better to drink one bottle a day for breakfast, and two bottles a day for morning and evening. You can also drink it outside three meals according to your personal living habits, but you should pay attention to eating starch-rich food before drinking, so that milk can stay in the stomach for a long time, which is conducive to the comprehensive absorption and utilization of nutrients. This is the reason why it is not advisable to feed on an empty stomach.