The list of the top seven health-related myths and misconceptions, that even some doctors fall prey to, and that we’ve been hearing time and again, goes as follows:

1. Reading in dim light ruins your eyesight.
2. Using cell phones in hospitals is dangerous.
3. Fingernails and hair grow after death.
4. We use only 10 percent of our brains.
5. You should drink at least eight glasses of water a day.
6. Shaved hair grows back faster and coarser.
7. Tainted candy from strangers is a Halloween threat.

Full article: Top Seven Health Myths (Newsweek).