Not too long ago, we had to educate ourselves about the hazards of secondhand smoke and recognize that it is indeed a concern. Now, as research evolves, thirdhand smoke is stepping into the spotlight.

In a world where we’re increasingly conscious of what we put in and on our bodies, the ingredients in our everyday products often remain shrouded in mystery. While brands market their items as safe and effective, many contain substances that raise eyebrows—or worse, alarms.