I started juicing about a year ago, when a friend of mine became obsessed with enzymes and their healing properties. At the time I was dealing with severe fatigue, and was willing to try anything.
My favorite juice consists of (all organic):
4-6 carrots (depending on size of carrots)
a handful of fresh spinach
I drink this every morning, and sometimes in the evening. I notice an increase in energy, revitalization, my skin glows, acne clears up in days, any congestion disappears, and it also helps suppress appetite.