Optimum Nutrition (ON) Serious Mass is one of the most trusted high-calorie mass gainers for those who struggle to gain weight and muscle size. This powerful formula delivers 1,251 calories, 50 grams of protein, and 256 grams of carbohydrates per serving, offering a complete nutrient profile to support muscle recovery and growth.

Enriched with vitamins, minerals, and creatine, Serious Mass ensures your body receives everything it needs for consistent progress in the gym. It’s an ideal post-workout or meal replacement shake for athletes, bodybuilders, and hard gainers aiming to build a solid, muscular physique.

The vanilla flavour is smooth, tasty, and easy to mix, making it a great addition to your daily nutrition routine.

✅ Key Benefits:

• Provides 1,251 calories per serving for weight gain

• Delivers 50g of protein to support muscle recovery and growth

• Contains 256g of carbohydrates for sustained energy

• Enriched with vitamins, minerals, and creatine

• Perfect for hard gainers and those looking to build size fast

📦 Net Weight: 1 KG (2.2 lbs)
🍦 Flavour: Vanilla