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METAMYOSYN® Muscle Mass Formula* Specially designed for hard gainers who want to gain weight and pack-on quality mass.* MET-Rx® Xtreme Size Up is the ultimate muscle mass gainer, and features FOUR Hardcore Optimizer Blends to help you keep growing.* 

• 60 grams protein per serving
• 64-67 g energizing Carbs
• 3g Creatine
• 3g Glutamine
• 600 calories per serving!
• No Fructose or Aspartame
• Mixes quickly and goes down easy ^Depending on flavor