Quick Summary
Optimum Nutrition Serious Mass is a banana mass gainer protein powder in a 2.73 kg pack with 8 servings. It is a high-calorie formula with vitamins, creatine monohydrate and glutamine, designed for buyers who want a calorie-dense powder rather than a standard protein shake.
The stated serving profile includes over 1250 calories, 50 g of protein, 3 g of creatine monohydrate, over 250 g of carbohydrates, less than 5 g of fat and 25 vitamins and minerals per serving. It also contains sweetener and packaging may vary.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Optimum Nutrition, which helps identify the exact product range. |
| Product type | Serious Mass protein powder, a high-calorie mass gainer. |
| Flavour | Banana. |
| Pack size | 2.73 kg pack with 8 servings. |
| Calories per serving | Over 1250 calories per serving. |
| Protein per serving | 50 g of protein per serving. |
| Creatine per serving | 3 g of creatine monohydrate per serving. |
| Carbohydrates per serving | Over 250 g of carbohydrates per serving. |
| Fat per serving | Less than 5 g of fat per serving. |
| Added nutrients | 25 vitamins and minerals. |
| Other notes | Contains glutamine and sweetener; packaging may vary. |
What to Compare Before Buying
- Serving size: This pack contains 8 servings, so compare that with how often you expect to use it.
- Calorie level: The stated calorie count is over 1250 per serving, which is a major factor for anyone comparing mass gainers.
- Protein and carbohydrate content: The formula lists 50 g of protein and over 250 g of carbohydrates per serving, so compare the balance with your own nutrition goals.
- Flavour: This version is banana, so check the flavour before choosing an offer.
- Mixing preparation: The stated preparation uses 2 scoops with 710 ml of water or plant milk, so compare that with the drink size you prefer.
Common Buyer Questions
Does this come in other flavours?
Yes. The product is also described as being available in chocolate, chocolate peanut butter, cookies & cream, strawberry and vanilla.
How is it prepared?
Mix 2 scoops with 710 ml of water or plant milk. Fruit or nut butters can be added if you want a thicker smoothie-style drink.
Before You Decide
Check the flavour, pack size and serving count before choosing an offer. It also helps to compare the stated calorie, protein and carbohydrate figures with what you want from a mass gainer, and to confirm you are happy with the 2-scoop preparation and 710 ml mix size.






