Regular coffee drinking has certain benefits, coffee contains certain nutrients, coffee niacin contains vitamin B, roasted coffee beans contain more, and have free fatty acids, caffeine, tannins, etc.. Coffee is good for the skin, coffee can promote metabolic functions, revitalize the digestive airways, and has a great effect on constipation. Coffee can eliminate fatigue. To eliminate fatigue, it is necessary to supplement nutrition, rest and sleep, and promote metabolic functions, and coffee has these functions. Three cups of coffee a day can prevent gallstones. Caffeinated coffee stimulates gallbladder contraction and reduces bile endosol, the cholesterol that forms gallstones.