One common question among vapers is whether vapes or e-liquids have calories. The answer is that vapes and e-liquids do not have calories. The reason for this is that the vapor produced by vapes and e-cigarettes is made up of water, propylene glycol, and vegetable glycerin. These substances are all calorie-free and do not contain any carbohydrates, fats, or proteins. https://www.keystonevape.com/blog/do-vapes-or-e-liquids-have-calories/