100. Anesthesia

Redheads require more anesthesia to get numb.In a small experiment done in 2002 by the University of Louisville , 10 brunettes and 10 redheads were given an anesthetic and were subjected to electrical shocks. The readheads required on average 20% more anesthetic compared to the brunettes, to become too numb to feel the shocks.  According to the test’s findings, anesthesiologists should consider using more anesthetic when before performing surgery on a redhead.