Drinking milk in the morning is relatively best for the following reasons: 1, milk is rich in calcium, and calcium can not be well absorbed without the promotion of vitamin D. The calcium in the milk drunk in the morning, after the exposure to sunlight during outdoor activities in the morning and afternoon, can produce sufficient vitamin D, which will allow the absorption rate of calcium in milk to be well improved. 2, milk is relatively cold, if you drink milk in the morning when Yang Qi is strong, can make the spleen and stomach transport function better, so that the milk protein, calcium through the spleen and stomach transport and get good absorption.