Optimum Nutrition (ON) Serious Mass

Optimum Nutrition (ON) Serious Mass – Chocolate Flavour – 3KG (6.6lbs) is one of the world’s most trusted high-calorie mass gainers, designed for individuals with serious strength and size goals. This calorie-dense formula delivers over 1250 calories, 50g of protein, and 250g+ carbohydrates per serving to support muscle growth and strength development—especially for hard gainers and high-performance athletes.

Serious Mass features a carefully balanced blend of whey protein concentrate, calcium caseinate, and egg protein, along with added creatine, glutamine, and essential vitamins and minerals to promote enhanced muscle recovery and growth. It is an ideal post-workout or between-meal supplement to meet elevated nutritional demands.

With its rich chocolate flavour, this gainer not only performs but also delivers on taste, making it easier to stick to your bulking nutrition plan.

Key Benefits:

50g protein per serving from quality sources to build and maintain muscle

Over 1250 calories and 250g+ carbs for advanced weight gain

Enriched with creatine monohydrate, glutamine, and 25+ essential vitamins and minerals

Supports intense training, recovery, and lean muscle mass development

Chocolate flavour with smooth texture and easy mixability

Directions: Mix 2 heaping scoops with 700–800ml of water or milk. Best taken post-workout or as a high-calorie meal replacement depending on your fitness goals.

Optimum Nutrition Serious Mass is the ultimate support system for athletes who need maximum calorie and nutrient intake to fuel their transformation. Trusted by professionals, it's a go-to formula for serious results.