BEST DENTIST IN CHENNAI! Coffee is both dehydrating and acidic. This is a “double whammy” when it comes to bad breath. Not to mention the effects of cream and sweeteners that many add to their coffee. When coffee beans are roasted, sulfur-containing aroma compounds form. Along with the acid content in coffee, these compounds can produce bad breath. Coffee also causes dry mouth, which can worsen bad breath. Coffee-induced dry mouth is produced in part by caffeine, which is slightly dehydrating. If you suspect that your breath is off-putting to others, schedule a checkup. In just minutes we at Apple Dental can assess your oral hygiene and determine not only the cause of your bad breath, but provide a care plan to eliminate it.