The daily value of protein is not listed on nutritional labels because
a.
you can't consume too much protein
b.
most americans eat enough protein
c.
protein isn't a macronutrient
d.
protein isn't as important as fat

Option B. most Americans eat enough protein

it is not recommended unless the protein claim is to be used by infant or children under four years of age.

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