1. The main components of coffee are caffeine, tannic acid, fat, protein, sugar (usually converted into caramel after baking) and some minerals. Generally, the calorie of black coffee we drink is about per100g 1400 kcal. If each cup of coffee contains 2.5 grams of coffee, it is about 35 kilocalories, which is almost negligible.

2. Working hours are the best time for coffee to lose weight. Taste a cup of strong unsweetened coffee from 30 minutes to 1 hour after lunch, which will help digestion after meals and promote fat burning. Drinking a cup of unsweetened coffee before going to work and taking a walk together will be better.

After drinking coffee for 30 to 40 minutes, the concentration of fatty acids in human blood will become higher. At this time, as long as you cooperate with proper exercise, you can convert fatty acids in your body into heat energy, thus burning fat effectively.

4. Black coffee has a small calorie. A cup of black coffee100g has only 2.55 kilojoules of calories, and black coffee also has diuretic effect. In the process of brewing coffee at high temperature, an antioxidant compound will be produced, which is helpful for anti-cancer, anti-aging and even prevention of cardiovascular diseases, and can be comparable to fruits and vegetables.