For breakfast, I always just make my own "green juice" (Cucumber, celery, romaine, kale, broccoli stem, lemon, and green apple), but soon I'm going to switch to working out in the morning instead of at night. I know that when you have carbs before a workout, you're essentially burning off those opposed to stored body fat. Would green juice have the same effect, or am I safe to drink it before I workout?