Originally Posted by wolfchild

Protein powder is not some magical substance which can build and preserve muscle. The only way to build and preserve muscle is through resistance training. If you don't use it you loose it, no matter how many protein shakes you drink per day... In order to preserve muscles, those nuscles need to be put under stress regularly.
Protein powder can help you meet your daily protein needs and help you build muscle only if it's used in conjunction with resistance training and if your daily diet is dialed in perfectly. Protein powder used alone is useless and no different than drinking plain water.....Also don't forget about carbs, they are absolutely essential if your goal is to build any significant amount of muscle.