You know what shakes are good for? Making GNC lots of money. You want mass? EAT EGGS, FISH, AND LOTS OF LEAN MEAT. If you're 137 inside a 5-11 frame, your body is metabolizing food at race horse's pace. Pasta isn't a bad idea, it'll keep you from getting drowsy between workouts, but it builds the fat cells too quickly. Keep pressing A LOT of weight. No more than 2 or 3 sets of 12 reps. Just don't blow a nut - good luck!