Mass Weight Gainer
by Mutant
Calories that count: a high-protein, high-carb formula built for serious muscle and weight gain.
- Up to 56g 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 today
In stock£64.81
£0.95 / 100g
You save £25.71vs highest tracked price today
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Transparent protein profile
What's inside
Values per 100g, with the amount in one 280g serving
20g protein
56g per 280g serving
69g carbohydrates
192.1g per 280g serving
4g fat
12g per 280g serving - moderate fat
393 kcal
1100 kcal per 280g serving
View full nutritional information
| Nutrient | Per 100g | Per serving (280g) |
|---|---|---|
| Protein | 20g | 56g |
| Calories | 393 kcal | 1100 kcal |
| Carbohydrates | 68.6g | 192.1g |
| Fat | 4.3g | 12g |
Know when to buy
Price history
Lowest price on record, any flavour or size
£0.89/100g (£60.62 for 6.8kg on 19 Jul 2026)
6.8kg · all flavours · price per pack
- Amazon UKlatest £64.81, lowest £63.99, highest £68.87 in the last 90 days
Quick answers
Is this right for you?
Who is it for?
Mutant Mass Weight 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 20g of protein per 100g (around 56g per 280g serving), Mutant Mass Weight Gainer sits in a competitive position for a mass gainer product.
What else do you need to know?
Mutant Mass Weight Gainer is a mass gainer protein powder made by Mutant. It comes in 2.27kg, 6.8kg sizes. 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 Mutant Mass Weight Gainer in the UK?
The best price we have verified today is £0.95 per 100g for the 6.8kg bag, checked 26 Oct 2026. Use the buy button above to go straight to it.
How much protein does Mass Weight Gainer contain per 100g?
Mass Weight Gainer contains 20g of protein per 100g, with 56g per 280g serving. It is a mass gainer product.
Is Mutant Mass Weight Gainer currently in stock?
At the last check, 6 out of 6 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
2 sizes · any flavour · cost per 100g for each
The 6.8kg works out at £0.95 per 100g. The 2.27kg costs £1.30. Same powder, 1.4x the price per gram.
Where to buy in the UK
Any flavour · 6.8kg · 2 offers for this selection · sorted by cost per 100g
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