Muscle building means building up lean unadulterated muscle mass. There are two things that you can do to increase the muscle mass, one is to get proper exercise and the second thing is to have a controlled diet. For people who have skinny frame of body find muscle building is a little difficult. For such people best protein supplements are suggested to have a great body with good muscle mass. Diet will always remain an important part of overall muscle mass building process. There are several natural muscle building supplements that can help you to build muscles: