Best Mass Gainer 2026

Advertising Disclosure

Last Updated - 03.02.2026

Best Choice

01

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 16 Servings, 5.45kg, packaging may vary

Show more

12% Off
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

To prepare the Weight Gainer, mix 2 measuring spoons with 710 ml of water or plant milk, add fruit or nut butter for a tasty and high-calorie protein smoothie after exercise or between meals
Source EFSA Journal * 2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; *** 2011; 9(7):2305
Serious Mass protein powder is available in 6 flavours (banana, chocolate peanut butter, chocolate, cookies and cream, strawberry and vanilla) and contains sweetener
Protein powder formula without added sugar with 25 vitamins and minerals and less than 5 g of fat per serving, plus over 250 g of carbonic hydrates to support muscle regeneration***
Low-fat Mass Gainer with over 1250 calories and 50 g protein per serving to support muscle growth plus* 3 g creatine monohydrate to support performance**

74,90 € 84,99 €(12% Off off)
02

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 16 Servings, 5.45kg, packaging may vary

Show more

30% Off
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories: promotes muscle mass increase and replenishes the body's glycogen stores.
Packaging can vary: updated look, same trusted quality.
No added sugar. Contains 24 vitamins and minerals per serving.
Muscle-building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat.
Great value for money: Serious Mass protein powder has a high calorie content and contains high-quality protein.

62,94 € 89,99 €(30% Off off)
03

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73kg, packaging may vary

Show more

14% Off
9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories: promotes muscle mass increase and replenishes the body's glycogen stores.
Packaging can vary – updated look, same trusted quality.
No added sugar: Contains 24 vitamins and minerals per serving.
Muscle-building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat.
Great value for money: Serious Mass protein powder has a high calorie content and contains high-quality protein.

42,91 € 49,99 €(14% Off off)
04

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73kg, packaging may vary

Show more

18% Off
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories: promotes muscle mass increase and replenishes the body's glycogen stores.
Packaging can vary – updated look, same trusted quality.
No added sugar: Contains 24 vitamins and minerals per serving.
Muscle-building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat.
Great value for money: Serious Mass protein powder has a high calorie content and contains high-quality protein.

41,09 € 49,99 €(18% Off off)
Value for Money

05

Weider

WEIDER Mega Mass 4000 Weight Gainer Shake for Growth, Vanilla, with Protein, Creapure Creatine Monohydrate, Complex Carbohydrates, Vitamins and Minerals – Muscle Building Shake, 3 kg

Show more

36% Off
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Upgrade your performance: The daily intake of 3 g creatine increases physical performance during speed strength training as part of short-term intensive physical activity.
Quality promise: Sports and health are our passion. Our mission is to provide our highly valued, loyal customers with the best possible quality products.
Optimal solution for the hard gainer: With its high-calorie and protein-rich formula, our Mega Mass 4000 Weight Gainer is the ideal complement for muscle building and weight gain.
First-class composition: Our Mega Mass 4000 is rich in high-quality protein (whey, casein, chicken egg), complex carbohydrates and important micronutrients.
Extremely delicious: Whether chocolate, vanilla or strawberry, the classic milkshake flavours have never been so delicious and creamy. The powder tastes absolutely delicious in both milk and water.

40,39 € 63,35 €(36% Off off)
06

Weider

WEIDER Mega Mass 4000 Weight Gainer Shake for Growth, Vanilla, with Protein, Creapure Creatine Monohydrate, Complex Carbohydrates, Vitamins and Minerals – Muscle Building Shake, 3 kg

Show more

39% Off
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Upgrade your performance: The daily intake of 3 g creatine increases physical performance during speed strength training as part of short-term intensive physical activity.
Quality promise: Sports and health are our passion. Our mission is to provide our highly valued, loyal customers with the best possible quality products.
Optimal solution for the hard gainer: With its high-calorie and protein-rich formula, our Mega Mass 4000 Weight Gainer is the ideal complement for muscle building and weight gain.
First-class composition: Our Mega Mass 4000 is rich in high-quality protein (whey, casein, chicken egg), complex carbohydrates and important micronutrients.
Extremely delicious: Whether chocolate, vanilla or strawberry, the classic milkshake flavours have never been so delicious and creamy. The powder tastes absolutely delicious in both milk and water.

38,37 € 63,35 €(39% Off off)
07

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 8 Servings, 2.73kg, packaging may vary

Show more
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories: promotes muscle mass increase and replenishes the body's glycogen stores.
Packaging can vary – updated look, same trusted quality.
No added sugar. Contains 24 vitamins and minerals per serving.
Muscle-building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat.
Great value for money: Serious Mass protein powder has a high calorie content and contains high-quality protein.

46,57 €
08

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 8 Servings, 2.73kg, packaging may vary

Show more

11% Off
8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories: promotes muscle mass increase and replenishes the body's glycogen stores.
Packaging can vary – updated look, same trusted quality.
No added sugar. Contains 24 vitamins and minerals per serving.
Muscle-building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat.
Great value for money: Serious Mass protein powder has a high calorie content and contains high-quality protein.

44,53 € 49,99 €(11% Off off)
09

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 16 Servings, 5.45kg, packaging may vary

Show more

30% Off
8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories: promotes muscle mass increase and replenishes the body's glycogen stores.
Packaging can vary: updated look, same trusted quality.
No added sugar. Contains 24 vitamins and minerals per serving.
Muscle-building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat.
Great value for money: Serious Mass protein powder has a high calorie content and contains high-quality protein.

62,94 € 89,99 €(30% Off off)
10

Optimum Nutrition

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Banana, 8 Servings, 2.73 kg, packaging may vary

Show more
8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Supplied as instant powder. Simply mix with water for a delicious and calorie-rich post-workout drink or take it between meals to promote muscle growth.
Provides calories, promotes muscle mass increase and replenishes the body's glycogen stores.
No added sugar. Contains 24 vitamins and minerals per serving.
Muscle-Building preparation with 1,250 calories and 50 g of protein per serving and less than 5 g of fat!
Great value for money. Serious Mass protein powder has a high calorie content and contains high-quality protein.

45,57 €