Complete Product Guide
Optimum Nutrition Serious Mass
Serious Mass is a concentrated weight-gainer shake for people who find it difficult to create a calorie surplus through regular meals alone. A full serving combines a high calorie load with 50 g of protein and a large carbohydrate portion.
It is designed to complement a structured eating and resistance-training plan, not replace one. Because a full serving is substantial, customers can adjust the starting amount and liquid volume to suit appetite and tolerance while following the pack.
Why choose this product?
- About 1,250–1,260 calories per full serving, depending on market and flavor.
- 50 g of protein per full serving on current official formulas.
- About 250–253 g of carbohydrates to help build a calorie surplus.
- Includes creatine; current official editions list either 3 g or 5 g per serving.
- Available in multiple flavors and large packs for regular bulking routines.
Who is it for?
Best for adults with a high calorie target, a fast metabolism, limited appetite, or a busy routine that makes it difficult to eat enough food for planned weight gain.
How to use
Current official directions use two heaped scoops, approximately 335–340 g depending on edition, mixed with about 710 ml of water or another suitable drink and blended for 30–45 seconds. New users may begin with half a serving before moving to a full serving. Follow the measurements on the physical pack.
How to choose the right option
Compare the calorie, carbohydrate, creatine, allergen, and serving values on the exact flavor. Do not assume all Serious Mass packs use the same formula. If a full serving feels too large, choose a plan that starts with half a serving.
Available flavors and sizes
This product is available in 5 flavor or package options. Choose the right option before adding it to your cart.
- Available flavors: Strawberry, Banana, Chocolate, Chocolate Peanut Butter, Vanilla
- Package sizes: 5.44 kg
- Servings by package: 16
Important information before use
- This is a concentrated high-calorie product; fit it into a planned daily calorie intake.
- Contains milk and soy. Some flavors may contain gluten or carry traces of egg, nuts, or peanuts.
- Current European labeling states that the product is not suitable for people under 18.
- Calories, carbohydrates, creatine, scoop weight, and allergens vary by market and flavor.
Specifications
| Flavor | Strawberry, Banana, Chocolate, Chocolate Peanut Butter, Vanilla |
| Brand | Optimum Nutrition |
| Package / Net Weight | 5.44 kg |
| Form | Powder |
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