A new report debunks some long-held medical myths:
Authors Rachel Vreeman and Aaron Carroll checked them out and found all of them either false or unproven.
- 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.