Answer:
Digital white-out.
I always follow you around, everywhere you go at night. I look very bright to people, but I can make the sun dark. What am I?
I twist and turn and leave a loop. What am I?
I am a mini solar powered computer
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.