The Bulk Protein Company Serious Gainz 5kg Mass Gainer, Strawberry

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Product guide

The Bulk Protein Company Serious Gainz 5kg Mass Gainer, Strawberry

The Bulk Protein Company Serious Gainz is a strawberry mass-gainer powder supplied in a 5kg tub. The listing describes a 125g serving as approximately 460 calories, 27g protein and 74g carbohydrates, aimed at people adding calories to a bulking diet.

At a glance

Provides a calorie-dense shake for adding energy and carbohydrates to a bulking diet.
Listing states 40 servings from the 5kg tub, with preparation instructions for three scoops and 400–500ml of liquid.
The listed protein blend includes soy and dairy sources, alongside oat flour.

Price

£30.39Save 24%

Reference price: ~~£39.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

A large tub and stated 40 servings suit buyers planning regular use.
The stated calorie and carbohydrate content may help people who find it difficult to reach calorie targets through meals alone.
Can be mixed with water or milk, according to the listing.

Cons

The listed allergens include milk, soy and oat, with possible traces of egg, gluten, peanuts and tree nuts.
A 125g serving is a substantial shake, so it may not suit buyers who prefer smaller, lighter portions.

Technical specifications

17 specifications

Identity
Brand	The Bulk Protein Company
Model	Serious Gainz
Flavour	Strawberry
Diet type	Vegetarian
Protein sources	Soy, Whey
Recommended use	Post-Workout
Country of origin	United Kingdom

Nutrition and quantity
Servings per container	40.0
Calories per serving	460
Protein per serving	27g
Carbohydrates per serving	74g
Serving preparation	Mix 3 Scoops (125g) with 400-500ML of water. Once shake prepared consume the same day.
Allergen information	Contains: Egg may contain, Gluten may contain, Milk, Milk may contain, Oat, Peanuts may contain, Soy, Tree nuts may contain
Material type free	Fat Free

Dimensions and installation
Dimensions listed	29 x 29 x 26 centimetres
Weight listed	5 Kilograms
Package type	Tub

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title specifies strawberry, the product details claim 27g protein, 460 calories and 74g carbohydrates per serving, while other manufacturer copy gives protein as 26–28g, calories as 400+ and carbohydrates as 70–80g. Treat nutrition figures as claims and check the current label. The product is described as fat free despite listing milk-derived ingredients. Follow the stated serving directions and note the advisory limits use to healthy adults over 18.

Who is it for?

A good fit for

People looking for a high-calorie powder to supplement a planned bulking diet.
Buyers who want a strawberry-flavoured powder with both soy and dairy protein sources.

Less suited to

Anyone avoiding soy, milk or oats, or who needs to avoid the listed potential allergen traces.
Buyers seeking a low-calorie or small-serving protein shake.

The Bulk Protein Company Serious Gainz 5kg Mass Gainer, Strawberry · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 1,652 ratings

5 stars62%62%
4 stars14%14%
3 stars10%10%
2 stars3%3%
1 star11%11%

Customer feedback reports positive impressions of effectiveness, serving size and value, but experiences with texture, mixability, taste and drinkability vary. Some find it mixes well and tastes pleasant, while others describe a chalky or powdery texture and find it difficult to drink. For a shake intended as a substantial calorie addition, taste and texture may affect how easy it is to use regularly. These views are customer impressions and do not verify the listed nutrition claims.

Positive themes

Customers report finding the powder effective.
Customers appreciate the large serving size and describe it as good value.

Negative themes

Some customers describe a chalky or powdery texture.

Mixed feedback

Feedback on taste, drinkability and mixability is divided.

Frequently asked questions

How much powder does the listing recommend per shake?

The directions say to mix 3 scoops (125g) with 400–500ml of water and consume the prepared shake the same day.

What nutrition does the listing claim per serving?

One listing section states approximately 460 calories, 27g protein and 74g carbohydrates. Other manufacturer copy gives ranges or lower-bound wording, so check the product label for the current figures.

Which allergens are listed?

The listing names milk, oat and soy, and says egg, gluten, peanuts and tree nuts may be present.

Can it be mixed with milk?

Yes. Manufacturer copy says it can be mixed with water or milk. Milk adds another dairy source to an already milk-containing product.