Cooking vegetables destroys most if not all of the enzymes. But some of the vitamins and minerals are still ok.
Raw juice gets into the body within 15 minutes without being digested (with fruits and vegetables all digestion does is to separate the fiber from the juice). Juicing does this for you so your body can use more energy to rebuild and heal.
Raw or cooked fruits and vegetables supply needed fiber that is in itself bifocal to health.