Ask yourself a simple question: How many coffees do you consume daily? Or, if you are not an avid coffee drinker than how many do you drink per week, month or year? Although the question was centered on the quantity of the drink, the more important question is "what do you add to the coffee?". Coffee in its raw, black form offers no nutritional or caloric value. When looking at a nutritional index of coffee you will see an overwhelming number of zeros across all columns including: calories, fats, proteins, carbohydrates,  vitamins and minerals. So nutrition wise, coffee appears to be comparable to water.