Protein alone will not pack on the pounds (hopefully muscle rather than fat). You need good quality carbs & fats/oils also to meet your daily calorie maintence and rebuilding requirements. The mean average for active males is around 3,000 daily. Try to up that to 3,500 (or more..depending on body type) for muscle mass gains. You may gain a little excess body fat, but not to worry. Once the desired muscle gains, some fat lose is easily taken care of by adjustments to the BB'ing diet. Good Luck.