This week, Dr. Aaron Carroll will join Dr. Galati and discuss medical myths, some that even physician believe. Dr Carroll is an Associate Professor of Pediatrics, and the Director of the Center for Professionalism in Medicine at University of Indiana.

Many common beliefs about what is good and bad for you are untrue, they are "medical myths", said US researchers writing in a leading medical journal

Even doctors are duped, said authors Rachel C Vreeman, fellow in children's health services research at the Indiana University School of Medicine, and Aaron E Carroll, assistant professor of paediatrics at the Regenstrief Institute, both in Indianapolis, writing in the 22nd December Christmas issue of the BMJ. Click here to read the article.

Should people drink at least eight glasses of water a day? Does reading by a dim light damage eyesight? Does shaving make hair grow back thicker?

These are three of the seven beliefs held by members of the public and doctors that Vreeman and Carroll selected for research and critical review. They noted the quality of the evidence they found, and also when there was no evidence one way or the other. The seven beliefs are:
  1. People should drink at least eight glasses of water a day.
  2. We use only 10% of our brains.
  3. Hair and fingernails continue to grow after death.
  4. Shaving hair causes it to grow back faster, darker, or coarser.
  5. Reading in dim light ruins your eyesight.
  6. Eating turkey makes people especially drowsy.
  7. Mobile phones create considerable electromagnetic interference in hospitals.
Vreeman and Carroll's found the evidence about these beliefs ranged from uproven to untrue.