does any one know when my skin will start to clear?

Hi!
I have adult acne, well, im only 22, but i have bad skin. And besides doing this fst to detox, i want to do ot to get clear beautiful skin. Today on my 5th day!!!
I will continue for 7 more days(one week from today), then i would like to do all juice, fruite and vege fast for 5-10 days, then go raw food for a while. How long did it take for your skin to clear if that included you?
thanks, sarah