ON Serious Mass 12 lbs (5443g) Strawberry

• Supports Muscle Building & Weight Gain‡
• 50 g Protein – Helps Build and Maintain Muscle‡
• 1,260 Calories – Helps Boost Calorie Intake
• 251 g Carbs – Helps Fuel Intense Workouts
• Artificially Flavored
• Protein Powder Supplement
• Strength Training
• Supports Performance
• Supports Weight Gain Goals‡
• Authentic Optimum Nutrition Product
• Informed Choice, We Test You Trust
• Regularly Tested For Banned Substances

Why Serious Mass™? With two heaping scoops, you get… 

• 50 g of protein to support muscle building and recovery‡
• 1,260 calories to support calorie surplus for weight and muscle building‡
• 251 g of carbohydrate to support fueling of intense workouts and aid in replenishment of glycogen stores
• 5 g of creatine monohydrate to support strength, power, and performance‡
• Naturally Occurring Glutamine 8 g, Branched Chain Amino Acids 11 g and Essential Amino Acids 24 g 
• Good source of 19 vitamins and minerals 
• Vitamins A, C, E, and zinc help support a healthy immune system 
• B vitamins help convert food to cellular energy

OPTIMUM NUTRITION has been trusted to provide the highest quality in post-workout recovery, pre-workout energy, and on-the-go sports nutrition for over 35 years and in 90+ countries. After careful supplier selection, ingredients are tested to assure purity. potency and composition. We hold ourselves to the highest production standards, all so you can unlock your body’s full potential. 

SERIOUS MASS is designed to provide SERIOUS calories, protein and carbohydrates- making this a convenient way to get extra calories throughout your day. 

‡When taken over time in addition to normal calorie intake and regular weight resistance training.

^■See nutrition information for sat fat, cholesterol and sodium content.

Nutrition Facts