ON Serious Mass

Optimum Nutrition (ON)
Product Name:
ON Serious Mass 2.73kg
Dosage Form:
Powder – 2.73 kilograms (approximately 8 servings)
Ingredients (Latin, descending by weight):
Maltodextrinum, Proteinum Lactis Concentratum (Whey Protein Concentrate), Proteinum Lactis Isolatum (Whey Protein Isolate), Proteinum Lactis Caseinatum (Calcium Caseinate), Albuminum Ovorum, Dextrosum Monohydratum, Cacao Pulveratum (in chocolate flavor), Triglycerida Media Catena (MCT Powder), Fructosum, Creatinum Monohydratum, Inositolum, Cholinum Bitartras, L-Glutaminum, Acidum Ascorbicum (Vitamin C), Acetatum D-Alpha Tocopheryli (Vitamin E), Ferri Fumaras, Niacinamidum (Vitamin B3), Oxidum Zincum, Calcii D-Pantothenas (Vitamin B5), Manganesi Sulfas, Seleni L-Methioninum, Molybdeni Chelatum, Retinyl Acetatum (Vitamin A), Pyridoxini Hydrochloridum (Vitamin B6), Riboflavinum (Vitamin B2), Thiamini Mononitras (Vitamin B1), Iodi Potassium, Acidi Folicum, D-Biotinum, Cholecalciferolum (Vitamin D), Cyanocobalaminum (Vitamin B12), Edulcorans: Sucralosum, Acesulfamum Kalii, Aromata, Colorans: E150c (in flavored variants)
Recommended Daily Intake:
Mix 2 heaping scoops (approximately 334 grams) with 700 ml of cold water or low-fat milk. Consume 1–2 servings per day depending on caloric needs. For optimal use, take one serving between meals and/or after training. Do not exceed the recommended daily dose.
Product Benefits:
ON Serious Mass is a high-calorie, nutrient-rich weight gain formula specifically developed for athletes and individuals aiming to increase body weight, muscle mass, and overall size. Each full serving delivers over 1,250 kilocalories when mixed with water, or up to 1,600 kilocalories when prepared with milk, depending on the mixing fluid used.
This advanced formula combines a high carbohydrate-to-protein ratio, making it ideal for individuals with fast metabolisms, hard gainers, or anyone with elevated energy requirements due to intense physical activity. The carbohydrate base is derived primarily from maltodextrin and dextrose, which help restore glycogen stores and provide quick energy after demanding training sessions.
Each serving contains approximately 50 grams of blended protein from five sources: whey protein concentrate, whey protein isolate, calcium caseinate, egg albumin, and milk protein isolate. This combination provides a complete amino acid profile with both fast- and slow-digesting proteins, supporting immediate recovery and sustained muscle protein synthesis.
In addition to macronutrients, ON Serious Mass delivers a full spectrum of micronutrients, including 25 vitamins and minerals. These include iron, zinc, magnesium, calcium, vitamins A, C, D, E, and the complete B-vitamin complex to support energy metabolism, immune health, and optimal physiological function.
Functional additives such as creatine monohydrate, L-glutamine, inositol, and choline bitartrate are included to further enhance performance, support muscular endurance, and assist with post-workout recovery. Creatine promotes increased strength and ATP production, while glutamine supports muscle repair and immune resilience during intensive training cycles.
Medium-chain triglycerides (MCTs) provide an additional source of clean-burning fat-based energy, aiding caloric density without overloading digestive capacity.
Key benefits of ON Serious Mass include:
– High calorie formula for effective bulking and weight gain
– 50g protein per serving from multiple complete sources
– Over 250g of carbohydrates to support energy and recovery
– Fortified with 25 vitamins and minerals
– Includes creatine, glutamine, and MCTs
– Supports muscle growth, performance, and caloric surplus
– Mixes easily in a shaker or blender
This product is ideal for:
– Hard gainers with high metabolic rates
– Athletes in a bulking or muscle-building phase
– Individuals with limited appetite or difficulty consuming enough whole foods
– Post-surgery or underweight individuals requiring nutritional support under medical supervision
ON Serious Mass is best used in combination with a structured training program and balanced diet. It is not a substitute for whole foods but serves as a powerful nutritional tool to bridge caloric gaps and optimize lean tissue development.
Manufacturer:
USA, Optimum Nutrition (Glanbia Performance Nutrition)
Warning:
  • Do not use the food supplement as a substitute for a varied diet.
  • It is important to follow a varied and balanced diet and lead a healthy lifestyle.
  • Do not exceed the recommended daily dose; this is a warning not to use the food supplement as a substitute for a varied diet.
  • Keep out of reach of children.
  • Not to be used by children.
  • Not to be used by pregnant or breastfeeding women.
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