How do you feel about fasting as a means for detoxification and increasing your spiritual conciousness?

Have any of you ever tried any kind of fast? What were the results?

I' am Muslim, it stops and makes you feel about all those poor people in the world, y know, and how it feels for THEM. How everyday what they must deal with,a stomach without it's nutrients, and not only that but it's benefical for weight lost. i know it's for that, but sometimes it can help if you're are obese or overweight.