It releases adrenaline, which artificially increases your heart rate and forces your body to burn slightly more calories at rest
So I was quite familiar with the whole process of smoking
Yoshida T, Sakane N, Umekawa T, Kogure A, Kondo M, Kumamoto K et al (1999)
Most importantly, the aerosol emissions and secondhand smoke from vape products has been found to be exceptionally harmful to your health often containing heavy metals like lead and nickel, ultrafine particles that can be inhaled into the lungs, and benzene, an organic compound also found in car exhaust
One year after those increases, cigarette pack sales fell by at least 10% compared to the 12 months prior in all but three cases