Optimum Nutrition Serious Mass – High-Calorie Muscle & Weight Gainer (Chocolate Flavor)

Optimum Nutrition Serious Mass Chocolate is the world’s #1 mass-gaining protein formula, engineered for those who want to gain serious size, strength, and recovery support.

Each serving provides a powerful calorie boost made up of high-quality protein, complex carbohydrates, essential vitamins, and minerals to help you build muscle and recover faster.

Designed for hard gainers and active individuals, Serious Mass Chocolate delivers clean calories, balanced nutrition, and a rich chocolate flavor you’ll look forward to after every workout.

💪 Key Features & Benefits

High-Calorie Formula – Packed with protein, carbs, and essential nutrients to fuel weight gain and muscle development.
Premium Protein Blend – Includes whey protein concentrate and isolate for effective muscle repair and growth.
Complex Carbohydrates – Provides long-lasting energy and supports recovery after intense training.
Fortified with Vitamins & Minerals – Enhances nutrient intake and muscle metabolism.
Delicious Chocolate Flavor – Smooth, rich, and easy to mix for a satisfying shake.
Perfect for Hard Gainers – Ideal for athletes or anyone needing a calorie boost.
Trusted by Professionals – From Optimum Nutrition, the global leader in performance nutrition.

⚙️ Product Details

Brand Name: Optimum Nutrition
Product Name: Serious Mass Weight Gainer
Flavor: Chocolate
Form: Powder
Item Weight: 5.44 Kilograms (12 lbs)
Unit Count: 5443.1 Grams
Material Type Free: No Material Type Free
Package Type: Bottle
Number of Items: 1
Age Range Description: Adult
Recommended Use: Nutrition, Weight Gain, Post-Workout Recovery
Product Benefits: Weight Gain, Muscle Growth, Strength & Recovery

🥤 How to Use

Mix 2 heaping scoops of Serious Mass Chocolate with 710 ml (24 oz) of cold water or milk.
Blend for 30–45 seconds until smooth.
Add fruit, nut butter, or oats for extra calories and taste.
Consume 1–2 servings per day, preferably between meals or post-workout.
Use consistently with a balanced diet and exercise plan for best results.

⚕️ Safety Information

For adult use only.
Consult your physician or dietitian before use if you are under medical supervision or taking medication.
Not intended for pregnant or nursing women.
Store in a cool, dry place, away from sunlight.
Keep out of reach of children.

🌟 Why Choose Optimum Nutrition Serious Mass?

With over three decades of excellence, Optimum Nutrition delivers one of the most effective and trusted mass-gaining supplements in the world.

Serious Mass Chocolate combines the perfect balance of protein, carbs, and micronutrients to help you gain healthy weight, build lean muscle, and recover faster from intense training sessions.

Whether you’re a hard gainer, athlete, or someone looking to add muscle size — ON Serious Mass Chocolate delivers powerful, proven results with every scoop.