With the recession causing enough stress for all of us, the British Medical Journal decides to bust several common medical myths—for example, reading in dim light won't ruin your eyesight, so go nuts.

Sugar does not cause hyperactivity in children

You don't lose excess body heat from your head. (You can leave your hat at home if you don't want to muss your hair!)

Eating at night does not make you fat. (Though the obvious rules still apply—you can't eat more calories than you burn.

Unfortunately, there is no scientific evidence that you can cure a hangover.

Shaving does not cause hair to grow back faster, darker, or coarser.

Reading in dim light will not destroy your eyesight

You don't need to drink eight glasses of water a day, so save yourself the bloat