Compared to blondes or brunettes, redheads are more than twice as likely to avoid going to the dentist—and they may have good reason. The same genetic variant that explains their fiery locks also makes redheads resistant to local anesthesia, such as Novocaine, explaining their dread of dental procedures, University of Louisville researchers reported in Journal of the American Dental Association.
In fact, redheads may need 20 percent more anesthesia, researchers from the same center reported in an earlier study, in which women with bright red hair were compared to those with...
Not long ago, newspapers and magazines reported that, by the end of the century, redheads, of whom I am one, will be extinct. Gone. Kaput. Since then, other scientists have raised doubts about the great redhead extinction theory, especially since the research was conducted by the Oxford Hair Foundation—which is funded by Procter & Gamble, which manufactures hair dye. Still, who can say for sure who is right? I'm sure that, back in their day, the dinosaurs were pretty smug too.