Do carbs or protein build muscle?

Building Muscle: If you are trying to build muscle then you need protein. Most people consume too much carbs. Also you are much better off having 5 meals a day then 3 meals. I supplement between the three main meals with a zero carb protein shake. It provides the carbs and keeps your body fueled. You need at least one gram of protein per body pound per day to maintain and build muscle mass.

Both needed: Carbs provide the energy needed to exercise and protiens are the "building blocks" of muscle. Techically you need both.