Do it, now.
First time I did it, I dropped 20lbs. haermm
Well, I used to be real fat, like 340lbs, and I got tired of being that large, so I started eating better, and working out. When I was down to 230lbs, my doctor told me to try a colon/detox powder mix. He said I'd benefit from some detoxing, since some foods stay in your colon for long periods of time. I dropped 20 lbs, and felt like a starving kid from Africa, but damn did I feel good. You wouldn't believe the shit that comes out of you, I think I saw gum that I ate when I was five.