The concentration of gastric acid accumulated in human stomach is too high on an empty stomach. At this time, if you drink too much stimulating coffee, it is easy to stimulate the secretion of gastric acid and further increase the concentration of gastric acid. Excessive gastric acid level can cause heartburn, indigestion and other problems, and high concentration of gastric acid can also induce serious diseases such as gastric ulcer and gastric acid reflux. Therefore, it is recommended that black coffee should not be drunk on an empty stomach.

When is the right time to drink black coffee? It is recommended to drink half an hour before exercise.

Caffeine in black coffee can increase the activity of 1 1%- 12%. Drinking a cup of black coffee half an hour before exercise can not only improve the exercise effect, but also increase the concentration of free fatty acids in the blood within 30-40 minutes after drinking coffee. At this time, moderate exercise can convert fatty acids into heat energy, thus effectively burning fat. Therefore, it is recommended to drink before exercise.

Can you lose weight by drinking black coffee often? It can help you lose weight.

100 ml standard black coffee has only about 1 calorie, which is very low. Even if you accidentally drink too much, it will not cause a significant increase in body heat. So drinking black coffee during weight loss can promote fat metabolism and help to lose weight.

However, not all black coffee helps to lose weight. Only when the purity of coffee reaches more than 75% can it help to lose weight, so that the weight loss effect of high-purity coffee will not be affected by adding a small amount of sugar. But this kind of coffee is rich and bitter, and tastes bitter.

Drink black coffee several times a day to lose weight. It is recommended to drink it twice.

Although black coffee can promote fat metabolism and help to lose weight, excessive drinking of black coffee will also make the nerve center excessively excited, which will lead to insomnia, anxiety, irritability and other adverse reactions. In addition, coffee is an alkaline food. Excessive intake of alkaline substances will affect the secretion of gastric acid in the human body, which will lead to gastrointestinal obstruction and other diseases. Therefore, it is recommended to drink 500 ml of black coffee twice a day.