This was taken from naturalstrength.com.
Zero Carb Diets
To me, anyone on a zero carb diet is just showing his stupidity. What fuel do you think your brain burns? Have you ever heard of the Krebs Cycle? ..Energy Systems...ATP ..or fast twitch (type 2b) muscle fiber? If you believe in zero carbs you obviously have not and have no clue. When you strength train you burn carbohydrates as fuel. Your body can not compensate for poor fuel. If you are out of gas and are inadequately fueled, you are not capable of training hard and are doomed to fail. You can get all the rest and recovery you want, be mentally focused, and eat lots of protein but you will still feel weak and tired if you do not have enough glycogen storage in your muscles and liver. You will not make it through your workout. Complex carbohydrates are essential to your training success : don't be fooled by the quackery.
If you don't believe me, go to a registered dietician for advise. Do not go to a health food store for advise. This is the LAST place you should be asking questions. There you will more than likely find a Greatfull Dead listening, dope smoking high school drop out making minimum wage at the counter. Do not ask him for advise!! Do not read the mega hype muscle mags for advise. Do not go to your gym for advise on nutrition either as they are no better. Do not ask a bodybuilder for advise, do not ask your chiropractor for advise, do not ask your friend for advise, do not ask your bartender for advise, do not ask your personal trainer for advise. See a Registered Dietician. Get it!