By reenacting vaping behavior in the lab, those of us who study design and behavior can better understand the nature of the constituents being consumed.

What have we have found so far?

Puff flow rate alters the nature of the aerosol, so users can control the strength of each puff simply by altering the way they puff.

E-cigarette users change their puffing flow rate when they switch flavors or nicotine levels and are altering their exposure to harmful or potentially harmful constituents.

For a given e-cigarette brand and flavor, there is a wide range of use behaviors, such as puff flow rates and puff durations.

Machine replays of vapor behaviors show exposure varies over a wide range for any given product.