Complete Mass Gainer
by Bulk
Calories that count: a high-protein, high-carb formula built for serious muscle and weight gain.
- Up to 42g protein per serving
- High calorie for bulking phases
- For shakes, smoothies, baking and more
Flavour pictures illustrate the taste, not the powder's colour or ingredients.
Best price
In stock£62.99
£1.26 / 100g
Secure retailer checkout
We may earn a commission at no extra cost to you. Affiliate disclosure
Transparent protein profile
What's inside
Values per 100g, with the amount in one 150g serving
28g protein
42g per 150g serving
60g carbohydrates
90g per 150g serving
4g fat
6g per 150g serving - moderate fat
370 kcal
555 kcal per 150g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (150g) |
|---|---|---|
| Protein | 28g | 42g |
| Calories | 370 kcal | 555 kcal |
| Carbohydrates | 60g | 90g |
| Fat | 4g | 6g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£0.52/100g (£12.99 for 2.5kg on 12 Jul 2026)
5kg · all flavours · price per pack
- Bulklatest £62.99 (one check so far)
Quick answers
Is this right for you?
Who is it for?
Bulk Complete Mass Gainer is designed for hard-gainers and anyone in a dedicated bulking phase who struggles to eat enough calories. Mass gainers combine protein with carbs and calories to support weight gain and muscle growth during intense training blocks.
What can you expect?
A calorie-dense shake designed to help you gain weight. Mass gainers pack protein alongside a significant amount of carbohydrates and calories per serving. Servings tend to be larger than standard protein powders, so expect thicker shakes and bigger scoops. With 28g of protein per 100g (around 42g per 150g serving), Bulk Complete Mass Gainer sits in a competitive position for a mass gainer product.
What else do you need to know?
Bulk Complete Mass Gainer is a mass gainer protein powder made by Bulk. It comes in 155g, 405g, 1kg, 2.5kg, 5kg sizes, and WheyWise tracks prices across 2 UK retailers so you can always find the best deal. Every price on WheyWise is read from the retailer’s own page and re-checked daily and sorted by cost per 100g, so you can see both the cheapest option and how current it is. All links to Amazon and retailer sites are affiliate links - this is how WheyWise stays free.
Frequently asked questions
Where is the cheapest place to buy Bulk Complete Mass Gainer in the UK?
We refresh Bulk Complete Mass Gainer pricing daily from Amazon UK and show the fetch time next to every figure. If no verified price is showing above, we do not currently hold one we would stand behind, and the buy button will take you to the live listing to check.
How much protein does Complete Mass Gainer contain per 100g?
Complete Mass Gainer contains 28g of protein per 100g, with 42g per 150g serving. It is a mass gainer product.
Is Bulk Complete Mass Gainer currently in stock?
At the last check, 32 out of 33 tracked variants were in stock. Stock status carries the same fetch time as the price shown above, so check the retailer listing before ordering.
Pick your pack
5 sizes · Banana · cost per 100g for each
The 5kg works out at £1.26 per 100g. The 405g costs £12.34. Same powder, 9.8x the price per gram.
Where to buy in the UK
Banana · 5kg · 1 offer for this selection · sorted by cost per 100g
Similar products you might prefer
Other mass gainer powders from different brands, cheapest per 100g first.
The Bulk Protein Company
Vegan Gainz
Applied Nutrition
Critical Mass Professional Lean Mass Gainer
Medi-Evil Nutrition
Purely MASS - Special Offer