Is fasting bad for your health?
Depends. There are many different forms of fasting. If you are fasting in a way that simply doesn't allow for consumption of any food, that is bad for example.
yes. You don't eat food. You don't take in calories your body needs.
Fasting for a specific time/period are not bad for health.
It's good for you.
Specific time & period no. It also depends what type of fast your doing
no unless you do it more than twice a month for more than 2 days
if you are fat like me, shouldn't hurt. live off fat of the land.
Well that all depends if you are doing it for Lent then no.
Yes, your body needs the nutrients in food.