Juice fasting, colon cleansing and Liver Flushing were the keys for ME. For my partner the key was chelating the gunk in his arteries. My point is that every person is different, and that a good iridologist can tell you where your personal gunk has settled and help you plan a strategy to remove it.
Yes, there are lots of posts on juices on this forum, and you can also search the net for Juice Fasting and find lots of wonderful stuff.
Personally I believe it is best to drink fruit juices in the am, when the body is naturally cleansing, and veggies in the pm when you are rebuilding as suggested by the very knowledgeable fasting guru Paavo Airola.