
Originally Posted by
Darus Grey
As far as physical benefits, there is no proven(or even correlative) benefits to fasting.
Infact there's only downsides,it's main effect is slowing down your metabolism, which isn't a big deal in general, but in modern society this can lead to un-needed weight gain, which as I'm sure most fat people know is an exponential problem(i.e. metabolism slows, gain weight, weight gain makes it harder to raise metabolism, slows again...rinse repeat until you're 1600lbs) though most people reach an equallibrium point far before then, since weighing more causes you to burn more calories for the same activities, and you reach a point where the actions required for survival(work,etc) consume the same amount of calories you eat and you stay there. Yay for tangents.
My point being, fasting has no benefits, the downsides aren't serious(barely mild) , but it specifically does not cleanse your body.
The symbolic meaning of fasting as has been pointed out is the true reason. Just like the Hajj, every Muslim(is supposed to) travel to Mecca, and every Muslin(is supposed to) fast for Ramadan.
You can take two completely opposed people and they can still talk about their Hajj or Ramadan, and as we all know, common ground is the first step to negotiation and tolerance.