54% of Americans drink coffee every day. Unfortunately, daily coffee can add up i calories depending on whether you add milk, flavoring, or sugar. According to Business Insider, "Black coffee, including espresso, has less than 10 calories per 8-ounce cup. If you want to cut calories and keep your coffee as healthy as possible, consider ordering a regular brew without any added ingredients. Black coffee can be bitter, but over time your taste buds will adapt to the bold flavor."