Milk is usually best drunk in the morning, for the following reasons: 1, because milk is rich in calcium, in order to better calcium absorption requires the participation of vitamin D. If you drink milk in the morning, after the next morning and afternoon outdoor activities, sunlight exposure to the skin to produce vitamin D, to drink in the morning in the milk of calcium fully absorbed and metabolized; 2, from the point of view of Chinese medicine food therapy milk is cold, and the morning is a more vigorous moment of Yang, if the cold milk in the morning to drink, can well enhance the transport and absorption of milk.