Product Overview

Optimum Nutrition Serious Mass is a high-calorie weight gain formula designed to help individuals increase daily calorie intake, support muscle growth, and improve recovery. Each serving delivers 1,250 calories, 50g of protein, 250g of carbohydrates, and 3g of added creatine to support size, strength, and post-workout replenishment.

Using a blend of whey protein concentrate, carbohydrates, vitamins, minerals, and creatine monohydrate, Serious Mass is ideal for hard gainers, athletes, or anyone struggling to consume enough calories through whole foods alone. It can be used post-workout, between meals, or before bed to support consistent muscle-building goals.

How To Use

Mix 2 heaped scoops (335g) with 710ml of water or milk and blend for 30–45 seconds.

Can also be added to smoothies, oats, yoghurt, or meals to increase daily calorie intake.

Best used post-workout, between meals, or before bed depending on calorie requirements.

Serving Information

Serving Size: 2 Heaped Scoops (335g)

Servings Per Container: 8

Container Size: 2.73kg

Whats In A Serving

Per 335g Serving

Calories: 1260 kcal
Energy: 5273 kJ
Fat: 6.3g
Saturated Fat: 3.5g
Carbohydrates: 250g
Sugars: 12g
Protein: 50g
Salt: 1.48g

Vitamins & Minerals

Vitamin A: 664µg
Vitamin D: 4.2µg
Vitamin E: 9mg
Vitamin K: 75µg
Vitamin C: 63mg
Thiamin (Vitamin B1): 0.90mg
Riboflavin (Vitamin B2): 1.1mg
Niacin: 13mg
Vitamin B6: 1.1mg
Folic Acid: 149µg
Vitamin B12: 1.9µg
Biotin: 39µg
Pantothenic Acid: 4.5mg
Calcium: 770mg
Phosphorus: 536mg
Magnesium: 284mg
Iron: 14mg
Zinc: 10mg
Copper: 1mg
Manganese: 2mg
Fluoride: 2.9mg
Selenium: 55µg
Chromium: 33µg
Molybdenum: 42µg
Iodine: 150µg

Performance Ingredients

Creatine Monohydrate: 3g

Ingredients

Corn Maltodextrin, Whey Protein Concentrate (Milk), Emulsifier (Lecithins (Contains Soy)), Flavourings, Creatine Monohydrate, Milk Mineral Complex, Minerals (Magnesium, Iron, Zinc, Manganese, Fluoride, Selenium, Iodine, Copper, Molybdenum, Chromium), Salt, Vitamins (Vitamin C, Vitamin E, Vitamin B3, Vitamin A, Pantothenic Acid, Vitamin B5, Vitamin B2, Folic Acid, Vitamin D, Vitamin B6, Vitamin B1, Vitamin K, Vitamin B12), Stabiliser (Cellulose Gum, Guar Gum, Carrageenan), Sweetener (Sucralose), Colour (Riboflavins).

Allergen & Suitability

Contains milk and soy.

May contain traces of gluten, egg, nuts, and peanuts.

Not suitable for children under 18 years old.

Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle.

Store in a cool, dry place away from direct sunlight.

Payment & Security

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Optimum Nutrition Serious Mass - 2.73kg

£38.99

£38.99 ~~£40.00~~

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Optimum Nutrition Serious Mass is a high-calorie weight gain formula designed to support muscle growth, recovery, and overall size development. Delivering over 1,250 calories per serving, along with quality protein, complex carbohydrates, creatine, and a full vitamin & mineral blend, it provides the nutritional support needed to fuel serious progress.

Perfect for hard gainers, athletes, and anyone struggling to increase calorie intake, Serious Mass helps you build size and strength without the guesswork.

Each serving provides 50g of protein, 250g of carbohydrates, and 3g of creatine to support performance, recovery, and muscle development.

Enjoy post-workout or between meals to support consistent calorie intake and steady muscle growth.

Why Choose Optimum Nutrition Serious Mass?