Optimum Nutrition Serious Mass 12lb

High-Calorie Weight Gainer for Muscle Growth, Size, Strength & Recovery

When your goal is to build serious size and increase calorie intake, Optimum Nutrition Serious Mass delivers the protein, carbohydrates, vitamins, minerals, and calories needed to help support muscle-building and weight-gain goals.

Designed specifically for hard gainers, athletes, and individuals who struggle to consume enough calories through food alone, Serious Mass provides a powerful combination of protein and carbohydrates to help support muscle growth, recovery, and overall mass-building efforts. Whether you're bulking, increasing strength, or looking to add quality size, Serious Mass helps make reaching your calorie goals easier.

Perfect for bodybuilders, athletes, and anyone looking to gain weight and build muscle.

🌿 Why You'll Love It

✔️ High-calorie weight gainer formula

✔️ Supports muscle size and weight-gain goals

✔️ 50g of protein per serving

✔️ Over 1,200 calories per full serving

✔️ More than 250g of carbohydrates per serving

✔️ Includes vitamins and minerals for nutritional support

✔️ Great for hard gainers and athletes

✔️ Supports post-workout recovery and muscle growth

💪 What It Helps Support

Optimum Nutrition Serious Mass is designed to help support:

• Healthy weight-gain goals
• Muscle size and mass development
• Recovery after exercise
• Daily calorie intake
• Strength-training programs
• Lean muscle-building efforts
• Athletic performance
• High-calorie nutrition plans

This formula is commonly used during:

• Bulking phases
• Muscle-building programs
• Off-season training
• Strength-building cycles
• Athletic performance plans
• Mass-gaining nutrition programs

🔥 Key Ingredients & Why They Matter

50g Protein Blend

Serious Mass provides a blend of high-quality proteins that help support:

• Muscle growth
• Recovery after training
• Lean muscle maintenance
• Strength development

Protein is essential for repairing and building muscle tissue following exercise.

Over 250g of Carbohydrates

Carbohydrates help support:

• Calorie intake
• Workout energy
• Recovery
• Glycogen replenishment
• Weight-gain goals

The substantial carbohydrate content makes it easier to create the calorie surplus needed for muscle growth.

Naturally Occurring BCAAs & EAAs

Protein sources naturally provide amino acids that help support:

• Recovery
• Muscle protein synthesis
• Performance
• Lean muscle maintenance

Added Vitamins & Minerals

Includes essential nutrients that help support:

• Daily wellness
• Energy metabolism
• Nutritional balance
• Active lifestyles

Glutamine & Creatine Support Ingredients

Serious Mass includes additional performance-support ingredients commonly used to help support:

• Recovery
• Training performance
• Strength goals
• Muscle-building programs

⚡ Why Choose Serious Mass?

Many individuals struggle to consume enough calories to gain weight consistently.

Serious Mass helps solve that challenge by providing:

• High-calorie nutrition
• Premium protein
• Carbohydrate support
• Recovery nutrition
• Convenient mass-gaining shakes

Making it one of the most popular weight gainers in sports nutrition.

🏋️ Best For

• Hard gainers
• Bodybuilders
• Strength athletes
• Powerlifters
• Athletes with high calorie needs
• Individuals struggling to gain weight
• Active lifestyles

Perfect for:

• Bulking phases
• Mass-gaining programs
• Post-workout nutrition
• Meal supplementation
• Strength-building cycles
• Off-season muscle growth

🕒 How to Use

Mix one serving with water or milk and consume between meals, after workouts, or whenever additional calories are needed.

For best results:

• Use consistently
• Follow a structured training program
• Meet daily calorie targets
• Stay hydrated

Many users split servings throughout the day to help increase calorie intake more comfortably.

🍫 Flavor Options

Available in popular flavors including:

• Chocolate
• Vanilla
• Strawberry

Flavor availability may vary.

📦 Available Sizes

• 12lb Tub

Additional sizes may be available depending on availability.

🔄 Stacks Well With

Pairs well with:

• Creatine Monohydrate
• Pre-Workout Supplements
• Multivitamins
• BCAAs
• Electrolytes
• Recovery Supplements

This helps create a complete muscle-building and mass-gaining stack.

❓ Frequently Asked Questions

What does Optimum Nutrition Serious Mass help support?

Serious Mass helps support healthy weight gain, muscle growth, calorie intake, recovery, and strength-training goals.

Is Serious Mass good for gaining weight?

Yes. Serious Mass is specifically designed to help individuals increase calorie intake and support healthy weight-gain and muscle-building goals.

How much protein is in Serious Mass?

Each full serving provides 50g of protein to help support muscle recovery and development.

When should I take Serious Mass?

Many users take it after workouts, between meals, or whenever additional calories and protein are needed throughout the day.

Who is Serious Mass best for?

Serious Mass is ideal for hard gainers, athletes, bodybuilders, and anyone looking to increase calorie intake and build muscle mass.

📦 Key Details

• High-calorie mass gainer
• 50g protein per serving
• Over 1,200 calories per serving
• More than 250g carbohydrates per serving
• Supports muscle growth and recovery
• Includes vitamins and minerals
• Great for hard gainers and athletes
• 12lb size

Get Bigger. Get Stronger. Fuel Serious Growth.

Support your muscle-building goals with the calories, protein, and nutrients needed to help maximize size, strength, and recovery.

👉 Click Add to Cart and experience Optimum Nutrition Serious Mass today.