August 6, 2009 --For many, the thought of going to the dentist is cause for discomfort. New research shows that may be especially true for redheads. A new study published in the Journal of American Dental Association suggests people with red hair need larger doses of anesthesia. They may also be more resistant to Novocain.
Researchers believe the pain sensitivity in redheads may come from a genetic mutation that affects hair color.
One of the study's authors says the findings show a redheads' fear of the dentists tends to be more than just urban legend.