Category: Curiosities

According to the U.S. Food and Drug Administration, the adhesive on a U.S. envelope contains around 1.7 calories per gram, which equates to about one-tenth of a calorie per lick. This fact confirms that yes, licking envelopes have calories, but the amount is so minuscule it has no impact on your diet.

While standard printer paper is composed of cellulose fibers, a material with caloric potential when burned, the human digestive system is unable to process it for energy. This means that for a human, one sheet of paper contains zero nutritional calories.