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Optimum Nutrition Serious Mass Banana Protein Powder, 2.73 kg

£40.00 (as of 10/25/2026 20:10 PST - DetailsProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

Optimum Nutrition Serious Mass Banana is a 2.73 kg high-calorie mass gainer with 8 servings, 50 g protein and over 1250 calories per serving. It also lists 3 g creatine monohydrate, over 250 g carbohydrates, 25 vitamins and minerals, and a 2-scoop mix with 710 ml of water or plant milk.

SKU: B0015R18SU Category:

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

DetailVerified information and buyer relevance
BrandOptimum Nutrition, which helps identify the exact product range.
Product typeSerious Mass protein powder, a high-calorie mass gainer.
FlavourBanana.
Pack size2.73 kg pack with 8 servings.
Calories per servingOver 1250 calories per serving.
Protein per serving50 g of protein per serving.
Creatine per serving3 g of creatine monohydrate per serving.
Carbohydrates per servingOver 250 g of carbohydrates per serving.
Fat per servingLess than 5 g of fat per serving.
Added nutrients25 vitamins and minerals.
Other notesContains 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.

Brand

Optimum Nutrition

Manufacturer

OPTIG

Binding

Personal Care

Product Group

Drugstore

EAN

0748927028867

Part Number

1031913

Model

1031913

Color

Banana

Product Dimensions

15.35 x 11.42 x 5.51 inches

Item Weight

6.00 Pounds

Size

2.73 kg (Pack of 1)

Number Of Items

1

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