I believe in low carb diets but not zero carb diets.
Your workouts will be disasterous w/o any carbs to build glycogen levels up to give your muscles enery.
Not to mention that your brain needs carbs to function, I have been in those zone out phases that low carbs can cause.
Not good if you are working.
W/O any carbs, your body will catabolize muscle and protein for energy.
Good quality slow chain carbs are the best, mainly raw veggies, rice, baked potato and an occasional pasts, preferrably whole wheat pasta.