Charcoal roasted coffee uses special wood as fuel, because the coffee beans roasted by charcoal fire will have the taste of wood and be bitter.

Black coffee refers to coffee without any modification, just black coffee, not the name of coffee. It is said that black coffee can speed up metabolism. In addition, coffee can also induce diuresis and eliminate excess water in the body. Black coffee is used to lose weight because of its low calorie, almost zero. Other coffees have the same effect, but adding sugar and creamer will naturally increase calories, so you can't lose weight.