Optimum Nutrition Serious Mass Weight Gainer

Serious Gains Require Serious Fuel.

If you're struggling to pack on size, Optimum Nutrition Serious Mass is the heavy-hitter your diet needs. With a massive 1,253 calories, 50g of protein, and 253g of carbs per serving, this is one of the most calorie-dense mass gainers on the market — engineered for those who train hard and need to eat harder.

Why Serious Mass?

• 🔥 1,253 Calories Per Serving — Supports the caloric surplus needed for serious muscle and weight gain
• 💪 50g of Protein — Helps build and maintain lean muscle mass
• ⚡ 253g of Carbohydrates — Fuels intense workouts and replenishes glycogen stores
• 🏋️ Supports Muscle Building & Weight Gain Goals — Formulated for hardgainers and athletes in a bulking phase
• 🍌 Available in 4 Delicious Flavours — Banana, Chocolate, Strawberry, and Vanilla Ice Cream

Product Details

• Net Weight: 5.44kg (12LB)
• 16 Servings per bag
• Formulated Supplementary Sports Food

How to Use

Mix 2 heaped scoops (334g) with 700ml of cold water or milk. Consume post-workout or between meals to support your daily calorie and protein targets.

Formulated Supplementary Sports Food. Not a sole source of nutrition. Use in conjunction with a nutritious diet and appropriate physical training program.