First of all, drink coffee in moderation, not too high. Generally speaking, we should not drink more than 50 grams of coffee every day. Many friends like to add some milk to their coffee. In fact, this is not appropriate. You'd better not mix coffee with milk. If you really need to add something to drink, then our advice to you is to use non-dairy creamer, which is what we usually call coffee companion or condensed milk instead. Why? This is because milk is rich in minerals, especially calcium. As we all know, drinking milk is the best source of calcium supplementation. But when calcium is combined with coffee, caffeine, the main component of coffee, will adsorb minerals and calcium in milk. In this way, people will affect the absorption of calcium when drinking. However, in recent years, people say that drinking coffee will lead to calcium loss. At present, the international medical community has not reached a conclusion, and the disease has not been found in China. So, friends who love coffee, don't worry too much about this problem. In addition, you should also pay attention to the fact that coffee itself has little nutrition. Therefore, when drinking coffee, you might as well eat some snacks, or add some non-dairy powder and condensed milk to coffee, which not only regulates the taste of coffee itself, but also increases its nutrition. By the way, one more thing to tell you is that coffee usually takes effect about an hour after drinking, but its effect on the human body usually lasts for 4-5 hours. If you want to be energetic all day, you should have coffee at 9- 10 in the morning, or at two or three o'clock in the afternoon. This way, you can enjoy the benefits of coffee without affecting your sleep.