Optimum Nutrition Serious Mass is one of the most trusted weight gainers worldwide, designed for athletes, bodybuilders, and hard gainers who struggle to put on size. Each serving delivers over 1,250 calories, 50 g of high-quality protein, and a blend of complex carbohydrates, vitamins, and minerals to fuel intense training, support recovery, and promote lean muscle growth.

Key Features

• 1,250+ Calories Per Serving – High-calorie formula for serious mass gain.
• 50 g Protein – Supports muscle building and repair.
• Carbohydrate Blend – Provides over 250 g of carbs for energy and glycogen replenishment.
• Fortified with Vitamins & Minerals – Ensures complete nutrition.
• Creatine & Glutamine – Added support for performance and recovery.
• Delicious Flavours – Easy-to-mix shakes for everyday calorie intake.

Specifications

• Form: Powder
• Packaging: Jar / Bag (varies by pack size)
• Flavour Options: Multiple flavours available
• Goal: Weight Gain, Muscle Growth, Recovery, Strength
• Lifestage: Adult
• Gender: Men & Women
• Country of Origin: USA
• Brand Origin: International