So, live dirty and prosper? Alas, it's not quite that simple. Ozone levels are lowered by the interaction with hair funk, but only because of the chemical reactions that take place. A good chunk of human skin oils, 10-15 percent, are composed of (the terrifically named) squalene. The organic compound is replete with double bonds—something that ozone molecules react with "like crazy," according to Morrison. Ozone levels might be lowered, but secondary reactions between the reactive molecule and squalene ensure there's still some pretty bad stuff hanging around your head. The major lousy byproduct the researchers found was 4-oxopentanal—a different respiratory irritant.