Black coffee can lose weight, and its calorie is relatively low, which can promote fat metabolism. However, we should pay attention to several small details when drinking black coffee to lose weight: 1. Control amount: Although black coffee can accelerate fat metabolism and play a role in losing weight, it is not the more the better. The amount of black coffee consumed every day should not exceed 750ml. Excessive caffeine intake excites the central nervous system, speeds up the heartbeat, and leads to dizziness, palpitation, irritability, anxiety and insomnia. 2. Choose the right coffee: only coffee with a purity greater than 75% can lose weight. Because black coffee is rich and bitter, many people find it hard to accept it, so sugar cubes, condensed milk or granulated sugar will be added, but it will increase its calories, disrupt fat decomposition and aggravate obesity. When drinking black coffee, you can add a small amount of low-fat or skim milk to flavor it. 3. Choose the right time to drink black coffee: After drinking black coffee for half an hour, the fatty acid content in the blood reaches its peak. At this time, cooperating with exercise can accelerate the rate of fat decomposition and improve the weight loss effect, so drinking black coffee 30 minutes before exercise is the best. 4. Choose hot black coffee: caffeine can only play its role when you are in a hot drink state, so you should choose hot black coffee, which can promote blood circulation and achieve the effect of losing weight.