Inhaling harmful chemicals in vaping products can cause irreversible lung damage (they cannot be cured), lung disease and, in some cases, death. Some chemicals in vaping products can also cause cardiovascular disease and biological changes that are associated with the development of cancer. Mouth-to-lung inhalation (MTL) is a two-stage process. First, you bring the vapor to your mouth and hold it there for a second.
Then, breathe in again to bring the vapor to your lungs. So you press the fire button and inhale through your mouth, release it, inhale again to bring the vapor to your lungs and, finally, you breathe out. What happens when several chemicals and flavors are mixed together and then inhaled into the lungs? No one knows for sure. When vaping, a device (usually a vaporizer or a mod, an improved vaporizer that may look like a USB memory stick) heats a liquid (called vaping juice or electronic liquid) until it becomes a vapor that is inhaled.