While the liquid used in vapes, commonly known as e-liquid or vape juice, does contain calories, the consensus among health experts and scientific studies is that these calories are not absorbed by the body through inhalation and therefore do not contribute to weight gain.
The primary sources of calories in vape juice are its main ingredients: propylene glycol (PG) and vegetable glycerin (VG). Both are sugar alcohols that are used as a base in most e-liquids.
Here’s a breakdown of the approximate caloric content:
- Propylene Glycol (PG): Contains approximately 4 calories per gram.
- Vegetable Glycerin (VG): Contains approximately 4.32 calories per gram.
Flavoring concentrates, another key component of vape juice, may also contribute a very small number of calories, but they are used in such small quantities that their impact is generally considered negligible. Nicotine, if present, does not contribute any calories.
A typical 10ml bottle of vape juice can contain anywhere from 30 to 50 calories, depending on the PG/VG ratio and the specific flavorings used.
However, the crucial point is how the body processes these calories when vaped. The digestive system is designed to break down and absorb calories from food and drink. In contrast, when you inhale vapor from a vape, it goes into your lungs. The lungs are primarily responsible for gas exchange (oxygen in, carbon dioxide out) and are not equipped to absorb calories in the same way the stomach and intestines are.
Therefore, while the e-liquid itself has a caloric value, these calories are not utilized by the body for energy when inhaled. The act of vaping does not lead to caloric intake in the traditional sense.
Some users have anecdotally reported that the sweet taste of some vape flavors can help curb cravings for high-calorie snacks, potentially leading to a net-negative caloric effect, though this is not scientifically proven.
In conclusion, while it’s technically true that vapes contain calories, it’s a fact of little practical significance for those concerned about their daily caloric intake and weight management. The calories present in the vapor are not absorbed by the body and do not contribute to weight gain.