Deep roasted coffee tastes good, but the caffeine content is actually very low, so you should choose shallow roasted black coffee to lose weight. It's best not to drink instant ones.
Caffeine is a central nervous system stimulant, which can accelerate the heartbeat, sweat and promote metabolism, which is also one of the main pharmacological effects of coffee to lose weight. But if caffeine can suppress appetite, it is really hard to see its mechanism. He said that many patients do try to lose weight with black coffee in clinic. Some people drink more than 10 cups of coffee a day, and the result is not only gastric ulcer, but also insomnia and anxiety symptoms. Therefore, according to the advice of the Ministry of Health, the daily intake of caffeine should not exceed 300 mg.
Drinking black coffee to lose weight is unhealthy. If you really want to use black coffee as a weight loss aid, don't overdo it, but also cooperate with the cause of obesity. For example, people who have slow metabolism, don't sweat much at ordinary times, and have constipation problems can not only improve their metabolism, because caffeine can also excite visceral sympathetic nerves, improve intestinal peristalsis, and sometimes promote defecation. But people who already have ulcers, insomnia or heart problems are not suitable for drinking black coffee.