Dopamine works similarly to serotonin in many ways, but its much more focused on keeping you alert
When a craving hits, your brain quickly starts justifying "just one cigarette." The more attention you give a craving, the more power it can seem to have
Centers for Disease Control and Prevention, The Health Consequences of Smoking50 Years of Progress: A Report of the Surgeon General, Figure 2.1, 2014
The problem is that combustion also produces thousands of chemical compounds alongside the nicotine tar, carbon monoxide, benzene, formaldehyde, and others that are responsible for the well-documented long-term health risks of smoking
mL-based tracking better reflects real intake when devices and puff lengths vary