Taking a folic acid supplement during childhood can prevent blindness?
a. true
b. false

I believe the answer to your question will be false because folic acid has to do with other parts of the body but not the eyes.

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle