Serious Mass for Serious Goals

OPTIMUM NUTRITION Serious Mass powder supports muscle building, weight gain, and helps fuel workouts with up to 1260 calories, 50g of protein, up to 253g of carbohydrates, and 5g of creatine monohydrate in every serving ^1,7– all in a convenient shake for easy consumption.

Serious Mass is our highest-calorie weight gain formula – created specifically to provide maximum macros for athletes with extraordinary muscle and performance goals¹. Along with carbs for fueling your most intense workouts and calories to help support your bulking diet, the entire 50g of complete protein comes from fast-digesting whey protein concentrate from milk^1,3. It’s also a good source of 19 vitamins and minerals and delivers 8g of naturally occurring glutamine per serving⁷.

Choose from five rich, great-tasting flavors for a seriously delicious routine you’ll always look forward to in your performance-driven lifestyle. Trusted by elite strength athletes all over the world, it’s everything you’ve come to expect from OPTIMUM NUTRITION: The World’s #1 Sports Nutrition Brand⁴.

• Up to 1260 calories per serving to support calorie surplus for weight and muscle building¹˒⁷
• 50g complete, fast-digesting protein per serving to support muscle building and recovery¹˒⁷
• Up to 253g carbohydrates per serving to support the fueling of intense workouts and aid in replenishment of glycogen stores¹˒⁷
• 5g creatine monohydrate to support strength, power, and performance¹˒³˒⁷
• 8g naturally occurring glutamine per serving
• 11g branched chain amino acids (BCAAs) per serving
• 24g essential amino acids (EAAs) per serving
• Good source of 19 vitamins and minerals per serving⁷
• Vitamins A, C, E, and zinc help support a healthy immune system¹
• B vitamins to help convert food to cellular energy¹
• 5 rich, delicious flavors

Mix 340g (about two heaping scoops) with cold water, milk, or other beverage in blender for 30-45 seconds until dissolved.
New users may find it beneficial to begin with half of a serving for the first week and then gradually increase to 1 serving.
Suggested Use: For best results, consume 2-scoop serving regularly over time in combination with regular resistance exercise.