* Sugar causes hyperactivity in children
* Suicides increase over the holidays
* Poinsettia toxicity
* Excess heat loss through the head
* Eating at night makes your fatter
* You can cure a hangover
* People should drink at least eight glasses of water a day
* We use only 10% of our brains
* Hair and fingernails continue to grow after death
* Shaving hair causes it to grow back faster, darker, or coarser
* Reading in dim light ruins your eyesight
* Eating turkey makes people especially drowsy
* Mobile phones create considerable electromagnetic interference in hospitals.
Some of those I had to double check to make sure because I didn't believe it. Like the sugar in kids, the heat loss without a hat, the shaving one, and the Turkey myths
Sources:
http://www.bmj.com/cgi/content/full/337/dec17_2/a2769 and
http://www.bmj.com/cgi/content/full/335/7633/1288