Drinking black coffee in an empty stomach will give the feeling of fullness. Therefore we can consume coffee to briefly reduce the feeling of hunger and the desire to eat. However, consuming coffee with no food at all is strongly forbidden, since it will increase the desire to at even more higher. Consuming too much coffee in an empty stomach will be the cause of gastric ulcer.
Regular coffee (slow brewed as with a filter or cafetière) is sometimes combined with espresso to increase either the intensity of the flavour or the caffeine content. This may be called a variety of names, most commonly "red eye," "shot in the dark," and "depth charge" – though this last is a federally registered trademark of a company, Caribou Coffee, so its usage is restricted. Coffeehouse chains may have their own names, such as "turbo" at Dunkin' Donuts. A double shot of espresso in the coffee may be termed a "black eye," and a triple shot a "dead eye." "Caffè Tobio" is a version with an equal amount of coffee to espresso.