A 2g bag of black coffee is usually enough to drink one bag a day. Drink no more than 300 milligrams of black coffee every day. However, excessive intake will cause caffeine poisoning, increase the risk of heart disease, accelerate the loss of calcium, and cause osteoporosis. For human body, proper caffeine can slow down muscle fatigue, promote digestive juice excretion and promote renal function. The most critical ingredient in coffee is caffeine. It can be said that success is also caffeine, and failure is also caffeine.

Efficacy and function of black coffee

Drinking black coffee in moderation has the effects of refreshing, enhancing thinking ability and restoring muscle fatigue; At the same time, it can increase heart rate, raise blood pressure and relax smooth muscle. Black coffee refers to coffee drinks without milk or sugar. The main effective components of coffee are caffeine and its structural analogue theophylline. Caffeine is a central nervous stimulant, which has a strong central excitatory effect. Moderate use can dispel fatigue and excite nerves, and it is used to treat neurasthenia and coma and resuscitation in clinic.