Yogurt is best to drink in the morning and at night. Because nutrition is most needed in the morning, but you can't drink it on an empty stomach. You can mix it with some coarse grains, bread and eggs. Drinking it at night can help you sleep, and it is best to have yogurt with some biscuits or something. If you want to be better, you can drink pure milk. Yogurt can help digestion, but some people with poor gastrointestinal tract suggest drinking pure milk or high calcium and low fat milk. 1.The best time to drink yogurt is 2 hours after meals, because the PH value of gastric juice rises after meals, which is very suitable for the growth of lactic acid bacteria and can give full play to the nutrition of yogurt. 2. Don't drink yogurt on an empty stomach. Active lactic acid bacteria in yogurt can only grow when the PH value is above 4, and when it is empty, the PH value is below 2, so lactic acid bacteria will be killed by stomach acid and their nutritional value will be greatly reduced. 3. Don't drink yogurt by heating. If the temperature is too high, the beneficial bacteria in yogurt will lose their activity. If you buy yogurt for several days at a time, you should keep it in the freezer. Generally, the shelf life of yogurt is only 7-14 days.