Optimum Nutrition Serious Mass
Price range: $84.95 through $149.95
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Additional Information
Each serving of Serious Mass delivers an impressive 1250 calories, along with 50g of protein and 250g of carbohydrates to support muscle growth, recovery, and weight gain. The formula also includes added creatine, glutamine, and inositol to further assist with muscle recovery, strength, and performance. With over 25 added vitamins and minerals and no added sugar, Serious Mass provides a more complete nutritional profile than many traditional mass gainers.
The protein blend combines whey protein isolate, whey protein concentrate, milk protein isolate, and hydrolysed whey protein to provide a complete amino acid profile and fast-digesting protein support. Hydrolysed whey in particular helps improve digestion and absorption speed, making Serious Mass an excellent option for post-workout nutrition. The carbohydrate blend features ingredients such as oats, peas, and potato to provide multiple carbohydrate sources and micronutrient diversity rather than relying heavily on simple sugars and fillers.
Optimum Nutrition Serious Mass is available in flavours including Banana, Chocolate, Strawberry, and Vanilla, with both 6lb and 12lb sizes available. Its smooth taste and texture make it easier to consume large amounts of calories compared to many other mass gainers on the market.
Serious Mass is best suited for individuals over the age of 18 who are serious about gaining size, increasing muscle mass, or boosting overall calorie intake. It is particularly useful for people with fast metabolisms, active lifestyles, or those who struggle to consume enough meals throughout the day. While whole foods should always remain the foundation of a nutrition plan, a quality mass gainer like Serious Mass can be an effective tool for helping users achieve their muscle and weight gain goals.
How to Use
Mix 2 scoops (approx. 334g) with 400–500 ml of water or milk.
For best results, start with half a serving to assess tolerance.
Consume between meals or post-workout.
Use 1–2 servings daily depending on calorie needs.
Nutritional Information
(Approx. per full serving – 2 scoops / ~334g)
- Energy: ~1250 kcal
- Protein: 50 g
- Carbohydrates: 250 g
- Sugars: ~20 g
- Fat: ~4–5 g
- Creatine Monohydrate: ~3 g
- L-Glutamine: ~1 g
- Inositol: ~0.5 g
- Sodium: ~400 mg
- Potassium: ~1500 mg
- Vitamins & Minerals: Includes Vitamins A, C, D, E, B-complex, Calcium, Iron, Magnesium, Zinc and more
Ingredients
Carbohydrate Blend (Maltodextrin, Oat Powder), Protein Blend (Whey Protein Concentrate, Whey Protein Isolate, Milk Protein Isolate, Hydrolysed Whey Protein), Cocoa Powder (for chocolate flavours), Creatine Monohydrate, L-Glutamine, Inositol, Medium Chain Triglycerides, Vitamins & Minerals Blend, Natural and Artificial Flavours, Sweeteners (Sucralose, Acesulfame K), Salt, Emulsifiers (Soy Lecithin).
Quick Questions
What is Serious Mass used for?
It is a high-calorie mass gainer designed to support weight gain and muscle growth.
How many calories are in one serving?
Each full serving provides approximately 1250 calories.
When should I take it?
You can take it between meals or after workouts to increase daily calorie intake.
Is it suitable for beginners?
Yes, but beginners should start with half a serving to avoid excess calorie intake.
Does it contain creatine?
Yes, it includes creatine to support strength and muscle recovery.
Can it replace meals?
It can be used as a meal replacement when you need extra calories quickly.
Is it suitable for lactose-intolerant users?
No, it contains milk-based proteins and is not suitable for lactose intolerance.
Reviews
Additional Information
Optimum Nutrition Serious Mass is one of the most well-known and trusted mass gainer supplements on the market, designed to support weight gain, muscle growth, recovery, and overall calorie intake. Often referred to as the original mass gainer, Serious Mass has stood the test of time thanks to its high-calorie formula and ability to help individuals who struggle to consume enough food throughout the day. For people with fast metabolisms, demanding lifestyles, or high calorie requirements, Serious Mass provides a convenient way to significantly increase daily calorie intake and support muscle-building goals.Each serving of Serious Mass delivers an impressive 1250 calories, along with 50g of protein and 250g of carbohydrates to support muscle growth, recovery, and weight gain. The formula also includes added creatine, glutamine, and inositol to further assist with muscle recovery, strength, and performance. With over 25 added vitamins and minerals and no added sugar, Serious Mass provides a more complete nutritional profile than many traditional mass gainers.
The protein blend combines whey protein isolate, whey protein concentrate, milk protein isolate, and hydrolysed whey protein to provide a complete amino acid profile and fast-digesting protein support. Hydrolysed whey in particular helps improve digestion and absorption speed, making Serious Mass an excellent option for post-workout nutrition. The carbohydrate blend features ingredients such as oats, peas, and potato to provide multiple carbohydrate sources and micronutrient diversity rather than relying heavily on simple sugars and fillers.
Optimum Nutrition Serious Mass is available in flavours including Banana, Chocolate, Strawberry, and Vanilla, with both 6lb and 12lb sizes available. Its smooth taste and texture make it easier to consume large amounts of calories compared to many other mass gainers on the market.
Serious Mass is best suited for individuals over the age of 18 who are serious about gaining size, increasing muscle mass, or boosting overall calorie intake. It is particularly useful for people with fast metabolisms, active lifestyles, or those who struggle to consume enough meals throughout the day. While whole foods should always remain the foundation of a nutrition plan, a quality mass gainer like Serious Mass can be an effective tool for helping users achieve their muscle and weight gain goals.
How To Use
Mix 2 scoops (approx. 334g) with 400–500 ml of water or milk.
For best results, start with half a serving to assess tolerance.
Consume between meals or post-workout.
Use 1–2 servings daily depending on calorie needs.
Nutritional Information
(Approx. per full serving – 2 scoops / ~334g)
- Energy: ~1250 kcal
- Protein: 50 g
- Carbohydrates: 250 g
- Sugars: ~20 g
- Fat: ~4–5 g
- Creatine Monohydrate: ~3 g
- L-Glutamine: ~1 g
- Inositol: ~0.5 g
- Sodium: ~400 mg
- Potassium: ~1500 mg
- Vitamins & Minerals: Includes Vitamins A, C, D, E, B-complex, Calcium, Iron, Magnesium, Zinc and more
Ingredients
Carbohydrate Blend (Maltodextrin, Oat Powder), Protein Blend (Whey Protein Concentrate, Whey Protein Isolate, Milk Protein Isolate, Hydrolysed Whey Protein), Cocoa Powder (for chocolate flavours), Creatine Monohydrate, L-Glutamine, Inositol, Medium Chain Triglycerides, Vitamins & Minerals Blend, Natural and Artificial Flavours, Sweeteners (Sucralose, Acesulfame K), Salt, Emulsifiers (Soy Lecithin).
Quick Questions
What is Serious Mass used for?
It is a high-calorie mass gainer designed to support weight gain and muscle growth.
How many calories are in one serving?
Each full serving provides approximately 1250 calories.
When should I take it?
You can take it between meals or after workouts to increase daily calorie intake.
Is it suitable for beginners?
Yes, but beginners should start with half a serving to avoid excess calorie intake.
Does it contain creatine?
Yes, it includes creatine to support strength and muscle recovery.
Can it replace meals?
It can be used as a meal replacement when you need extra calories quickly.
Is it suitable for lactose-intolerant users?
No, it contains milk-based proteins and is not suitable for lactose intolerance.
