03/26/2012 04:40 pm ET

Redheads And Pain: Study Seeks To Confirm A Link

Numerous studies have suggested that redheads feel more pain. And now a new study from Southampton University Hospital is looking to confirm the theory.

The trial includes people with red hair over the age of 30. Researchers are comparing their reactions to tiny electric shocks with those of people with brown or black hair, the Daily Mail reported. The trial is set to end in September.

In 2009, a study in the Journal of the American Dentistry Association showed that redheads experience more trepidation at going to the dentist, ABC News reported. Past research has suggested that redheads generally require more anesthesia than people of other hair colors.

The Daily Mail reported that people who have red hair also have a gene that plays a part in endorphins, which is the body's natural way of relieving pain.

For more on the study, watch the CBS This Morning video above.