Which of the following may be inhaled when vaping?

When vaping, the following substances may be inhaled:

1. Nicotine: Often present in e-liquids, nicotine is a highly addictive substance.
2. Propylene Glycol and Vegetable Glycerin: These are the primary base liquids in e-liquids, used to create vapor.
3. Flavorings: Various chemical compounds are used to create different flavors in e-liquids.
4. Volatile Organic Compounds (VOCs): Some e-liquids may release VOCs when heated.
5. Heavy Metals: Trace amounts of metals like nickel, tin, and lead can be present due to the heating element.
6. Ultrafine Particles: These can be inhaled into the lungs and may pose health risks.

These components can vary depending on the type of e-liquid and the device used.