Drinking coffee to refresh oneself is the main reason why many people drink coffee. The main function of coffee refreshing is because coffee is rich in caffeine. Caffeine can affect the functions of brain, heart, blood vessels, gastrointestinal tract, muscles and kidneys. Moderate caffeine can stimulate cerebral cortex, promote sensory judgment, memory and emotional activities, make myocardial function more active, dilate blood vessels, enhance blood circulation and improve metabolic function. Caffeine can also reduce muscle fatigue and promote the secretion of digestive juice. This is why drinking coffee has a refreshing effect.

2. Coffee tastes good

Besides black coffee, more people like to drink fancy coffee. Fancy coffee has more ingredients than single coffee, such as milk, chocolate sauce, wine, tea and cream. Fancy coffee doesn't have much definition, but it does contain caffeine. It is also a drink. The taste is very rich and the shape is very beautiful. It is covered with cream or various sauces, and the bottom is smooth coffee, which has a rich taste. This is why more and more people like to drink coffee.