ON Serious Mass Gainer 5.5 KG, 16 Servings

Product Description:

Optimum Nutrition Serious Mass is one of the world’s best-selling weight gainer supplements, created for athletes and hard gainers looking to pack on serious size and strength.

Each serving delivers over 1,250 calories, 50g of high-quality protein, and a powerful blend of carbohydrates, vitamins, and minerals to help you meet your daily calorie and nutrient needs. With added creatine, glutamine, and essential nutrients, Serious Mass supports muscle growth, strength, and recovery.

The 5.5kg tub (16 servings) provides long-lasting support for your bulking phase and ensures you never fall short on your calorie goals.

Key Benefits:

• 1,250+ calories per serving to support muscle mass gain

• Packed with 50g protein blend (whey, casein & egg protein)

• Includes 250g carbohydrates for sustained energy

• Enriched with vitamins, minerals, creatine & glutamine

• Ideal for hard gainers and athletes with high calorie needs

• Delicious taste, easy mixability, and versatile usage

• Large 5.5kg tub for extended use

Recommended Use:

Mix 2 heaping scoops (334 g) with 700 ml of water or milk in a blender. For best results, consume post-workout and/or between meals. Start with a half serving if you are new to weight gainers, then build up to a full serving as tolerated.