If you compare this to highly concentrated fruit
juices you will notice that a green smoothie keeps you full for longer and
releases the energy over a longer period rather than a
quick spike.
While simple carbs (white bread, maida products,
juice, candy, etc.) are good after a workout as you need a
quick supply of nutrients and these do the work; The low - glycemic carbs (whole fruits, vegetables, whole grains and their products), digest really slow allowing a slow
release of blood glucose into the blood.