Best Mass Weight Gain Protein Powder of 2025

Last updated on 17/10/2025

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

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

Optimum Nutrition

25% OffFree Shipping

Why we love it

Supports muscle growth and performance.
Promotes muscle recovery after workouts.
Comes in 6 delicious flavours.

Main Highlights

Low fat mass gainer with over 1262 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 248 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

9.8

Exceptional

9.8

Exceptional

Optimum Nutrition

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

25% OffFree Shipping

Why we love it

Supports muscle growth and performance.
Promotes muscle recovery after workouts.
Comes in 6 delicious flavours.

Main Highlights

Low fat mass gainer with over 1262 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 248 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

Value for Money

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary

Optimum Nutrition

3% OffFree Shipping

Why we love it

Supports muscle growth and performance.
Promotes recovery with carbohydrates.
Offers tasty, diverse flavor options.

Main Highlights

Low fat mass gainer with over 1250 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 250 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary

3% OffFree Shipping

Why we love it

Supports muscle growth and performance.
Promotes recovery with carbohydrates.
Offers tasty, diverse flavor options.

Main Highlights

Low fat mass gainer with over 1250 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 250 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg)

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg)

The Bulk Protein Company

13% OffFree Shipping

Why we love it

Builds muscle with high protein.
Promotes mass gain effectively.
Offers excellent value for money.

Main Highlights

30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time.
PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition.
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from.
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle.
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements.

The Bulk Protein Company

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg)

13% OffFree Shipping

Why we love it

Builds muscle with high protein.
Promotes mass gain effectively.
Offers excellent value for money.

Main Highlights

30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time.
PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition.
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from.
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle.
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements.

The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA

The Bulk Protein Company

15% OffFree Shipping

Why we love it

Optimal for muscle recovery and growth.
Promotes mass gain efficiently.
Amazing taste with variety.

Main Highlights

30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time
PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements

The Bulk Protein Company

The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA

15% OffFree Shipping

Why we love it

Optimal for muscle recovery and growth.
Promotes mass gain efficiently.
Amazing taste with variety.

Main Highlights

30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time
PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements

Warrior Mass Protein Powder – 5.04kg – Serious Mass Gainer – High Calorie, Weight Gain Supplement – 61g of Protein, 18 Servings, 1000+ Calories Shake, Supports Muscle Growth (Vanilla Cheesecake, 5kg)

Warrior Mass Protein Powder – 5.04kg – Serious Mass Gainer – High Calorie, Weight Gain Supplement – 61g of Protein, 18 Servings, 1000+ Calories Shake, Supports Muscle Growth (Vanilla Cheesecake, 5kg)

Warrior

Free Shipping

Why we love it

Supports muscle, strength, mass gains.
Helps meet daily protein needs.
Offers six tasty flavours.

Main Highlights

✅ WARRIOR MASS – Has been designed to support muscle, strength, and mass gains. If you're an MMA fighter, boxer, or rugby player, or train aggressively to get REAL results from your body, Warrior MASS is for you!
✅ 61g PROTEIN PER SERVING TO BUILD MUSCLE MASS – A convenient supplement to meet your daily protein needs. Our Warrior MASS protein shake is packed with over 1000+ calories!
✅ 6 FLAVOURS – Warrior MASS comes in 6 tasty flavours: Double Chocolate, White Chocolate, Banana Crème, Vanilla Cheesecake, Salted Caramel, and Strawberry Crème.
✅ 5.04KG & 18 SERVINGS – An excellent value mass/weight gainer. Our recommended serving size is 2 rounded scoops (280g), and we suggest mixing it with 300 ml of water.
✅ PROTEIN BLEND – Made with Whey Protein Concentrate to provide an instant protein injection and Micellar Casein, which digests slowly over 8 hours. It’s perfect post-workout, ideal between meals, and an exceptional addition of clean food support to your daily diet. Warrior MASS has got your back.

Supports muscle, strength, mass gains.
Helps meet daily protein needs.
Offers six tasty flavours.

Main Highlights

✅ WARRIOR MASS – Has been designed to support muscle, strength, and mass gains. If you're an MMA fighter, boxer, or rugby player, or train aggressively to get REAL results from your body, Warrior MASS is for you!
✅ 61g PROTEIN PER SERVING TO BUILD MUSCLE MASS – A convenient supplement to meet your daily protein needs. Our Warrior MASS protein shake is packed with over 1000+ calories!
✅ 6 FLAVOURS – Warrior MASS comes in 6 tasty flavours: Double Chocolate, White Chocolate, Banana Crème, Vanilla Cheesecake, Salted Caramel, and Strawberry Crème.
✅ 5.04KG & 18 SERVINGS – An excellent value mass/weight gainer. Our recommended serving size is 2 rounded scoops (280g), and we suggest mixing it with 300 ml of water.
✅ PROTEIN BLEND – Made with Whey Protein Concentrate to provide an instant protein injection and Micellar Casein, which digests slowly over 8 hours. It’s perfect post-workout, ideal between meals, and an exceptional addition of clean food support to your daily diet. Warrior MASS has got your back.

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (White Chocolate, 5kg)

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (White Chocolate, 5kg)

The Bulk Protein Company

26% OffFree Shipping

Why we love it

Builds muscle, speeds recovery.
Promotes weight gain.
Great taste and value.

Main Highlights

30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time.
PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition.
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from.
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle.
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements.

The Bulk Protein Company

The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (White Chocolate, 5kg)

26% OffFree Shipping

Why we love it

Builds muscle, speeds recovery.
Promotes weight gain.
Great taste and value.

Main Highlights

30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time.
PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition.
PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from.
HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle.
EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements.

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Strawberries & Cream, 2 kg)

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Strawberries & Cream, 2 kg)

Reflex

Free Shipping

Why we love it

Engineered for muscle gains.
Contains essential nutrients.
Delicious taste experience.

Main Highlights

Engineered for Gains: This seamless protein shake mix is specifically formulated to accelerate muscle and weight gains and improve post-workout recovery, enhancing overall workout performance for the dedicated, hard gainer and serious athlete alike
Excellent Nutrition Profile: Packed with quality ingredients, each protein shake serving delivers over 1000 kcals, 200g of complex carbohydrates, 60g of muscle gain protein, critical EAAs, creatine, 18 vitamins and minerals (B12, B6, C, Iron, Zinc)
Outstanding Taste Sensation: Our Strawberries and Cream mass gainer flavour isn't just a treat for your taste buds - it's a deliciously creamy escape into indulgence with every sip, all while you are fueling your body for mass gain and muscle recovery
Optimal Timing for Maximum Impact: Consume Instant Mass Heavyweight high protein shake between meals for a positive nitrogen balance, 20-30 minutes post workout for best results or 45-60 minutes before sleep to aid overnight muscle maintenance
Trusted Quality Assurance: Reflex Nutrition's promise to quality means whey protein powder from grass-fed cows - Protein Sources are Glutamine Peptides, Whey Protein Concentrate, Milk Protein, Hydrolysed Whey Protein
Produced in an Informed Sport Registered Facility - Suitable for vegetarians and Halal certified - Zero added sugars, artificial colors, or soy protein, assuring a conscientious choice of weight gainer for your muscle-building objectives

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Strawberries & Cream, 2 kg)

Free Shipping

Why we love it

Engineered for muscle gains.
Contains essential nutrients.
Delicious taste experience.

Main Highlights

Engineered for Gains: This seamless protein shake mix is specifically formulated to accelerate muscle and weight gains and improve post-workout recovery, enhancing overall workout performance for the dedicated, hard gainer and serious athlete alike
Excellent Nutrition Profile: Packed with quality ingredients, each protein shake serving delivers over 1000 kcals, 200g of complex carbohydrates, 60g of muscle gain protein, critical EAAs, creatine, 18 vitamins and minerals (B12, B6, C, Iron, Zinc)
Outstanding Taste Sensation: Our Strawberries and Cream mass gainer flavour isn't just a treat for your taste buds - it's a deliciously creamy escape into indulgence with every sip, all while you are fueling your body for mass gain and muscle recovery
Optimal Timing for Maximum Impact: Consume Instant Mass Heavyweight high protein shake between meals for a positive nitrogen balance, 20-30 minutes post workout for best results or 45-60 minutes before sleep to aid overnight muscle maintenance
Trusted Quality Assurance: Reflex Nutrition's promise to quality means whey protein powder from grass-fed cows - Protein Sources are Glutamine Peptides, Whey Protein Concentrate, Milk Protein, Hydrolysed Whey Protein
Produced in an Informed Sport Registered Facility - Suitable for vegetarians and Halal certified - Zero added sugars, artificial colors, or soy protein, assuring a conscientious choice of weight gainer for your muscle-building objectives

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 2 kg)

Reflex

Free Shipping

Why we love it

Promotes muscle maintenance overnight.
Guarantees premium quality ingredients.
Suitable for various dietary needs.

Main Highlights

Engineered for Gains: This seamless protein shake mix is specifically formulated to accelerate muscle and weight gains and improve post-workout recovery, enhancing overall workout performance for the dedicated, hard gainer and serious athlete alike
Excellent Nutrition Profile: Packed with quality ingredients, each protein shake serving delivers over 1000 kcals, 200g of complex carbohydrates, 60g of muscle gain protein, critical EAAs, creatine, 18 vitamins and minerals (B12, B6, C, Iron, Zinc)
Outstanding Taste Sensation: Our Chocolate Perfection mass gainer flavour isn't just a treat for your taste buds - it's a deliciously creamy escape into indulgence with every sip, all while you are fueling your body for mass gain and muscle recovery
Optimal Timing for Maximum Impact: Consume Instant Mass Heavyweight high protein shake between meals for a positive nitrogen balance, 20-30 minutes post workout for best results or 45-60 minutes before sleep to aid overnight muscle maintenance
Trusted Quality Assurance: Reflex Nutrition's promise to quality means whey protein powder from grass-fed cows - Protein Sources are Glutamine Peptides, Whey Protein Concentrate, Milk Protein, Hydrolysed Whey Protein
Produced in an Informed Sport Registered Facility - Suitable for vegetarians and Halal certified - Zero added sugars, artificial colors, or soy protein, assuring a conscientious choice of weight gainer for your muscle-building objectives

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 2 kg)

Free Shipping

Why we love it

Promotes muscle maintenance overnight.
Guarantees premium quality ingredients.
Suitable for various dietary needs.

Main Highlights

Engineered for Gains: This seamless protein shake mix is specifically formulated to accelerate muscle and weight gains and improve post-workout recovery, enhancing overall workout performance for the dedicated, hard gainer and serious athlete alike
Excellent Nutrition Profile: Packed with quality ingredients, each protein shake serving delivers over 1000 kcals, 200g of complex carbohydrates, 60g of muscle gain protein, critical EAAs, creatine, 18 vitamins and minerals (B12, B6, C, Iron, Zinc)
Outstanding Taste Sensation: Our Chocolate Perfection mass gainer flavour isn't just a treat for your taste buds - it's a deliciously creamy escape into indulgence with every sip, all while you are fueling your body for mass gain and muscle recovery
Optimal Timing for Maximum Impact: Consume Instant Mass Heavyweight high protein shake between meals for a positive nitrogen balance, 20-30 minutes post workout for best results or 45-60 minutes before sleep to aid overnight muscle maintenance
Trusted Quality Assurance: Reflex Nutrition's promise to quality means whey protein powder from grass-fed cows - Protein Sources are Glutamine Peptides, Whey Protein Concentrate, Milk Protein, Hydrolysed Whey Protein
Produced in an Informed Sport Registered Facility - Suitable for vegetarians and Halal certified - Zero added sugars, artificial colors, or soy protein, assuring a conscientious choice of weight gainer for your muscle-building objectives

USN Hyperbolic Mass French Vanilla 2kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

USN Hyperbolic Mass French Vanilla 2kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

USN

Free Shipping

Why we love it

Superior taste meets muscle gain.
High calorie for bulk enhancement.
Nutrient-dense for optimum results.

Main Highlights

Our best mass gainer yet: Our best-tasting mass gainer is for those who want to increase their muscle mass, but don't want to compromise on the taste of their protein drink.
High calorie bulk powder: With up to 1183 calories our all-in-one mass and weight gainer is ideal for individuals who struggle to gain muscle mass and want a fast-acting, easy-mixing and effective formula.
Amazing taste, great results: The improved formula of our delicious vanilla flavour mass gainer provides a greater post-workout effectiveness, with a smoother taste - all delivered with less Sugar.
A weight gainer with nutrition: Our mass protein powder contains a massive 60g of protein per serving, partnered with 7.5g of Creatine and 18 vitamins and minerals (B12, B6, C, Magnesium, Iron) to help you be at your best.
For best results: To get the best results from Hyperbolic Mass, take 1 servings daily, either after training or as a snack between meals. Simply mix 4 scoops (300g) of the protein powder with 900ml of cold water and enjoy.

USN Hyperbolic Mass French Vanilla 2kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

Free Shipping

Why we love it

Superior taste meets muscle gain.
High calorie for bulk enhancement.
Nutrient-dense for optimum results.

Main Highlights

Our best mass gainer yet: Our best-tasting mass gainer is for those who want to increase their muscle mass, but don't want to compromise on the taste of their protein drink.
High calorie bulk powder: With up to 1183 calories our all-in-one mass and weight gainer is ideal for individuals who struggle to gain muscle mass and want a fast-acting, easy-mixing and effective formula.
Amazing taste, great results: The improved formula of our delicious vanilla flavour mass gainer provides a greater post-workout effectiveness, with a smoother taste - all delivered with less Sugar.
A weight gainer with nutrition: Our mass protein powder contains a massive 60g of protein per serving, partnered with 7.5g of Creatine and 18 vitamins and minerals (B12, B6, C, Magnesium, Iron) to help you be at your best.
For best results: To get the best results from Hyperbolic Mass, take 1 servings daily, either after training or as a snack between meals. Simply mix 4 scoops (300g) of the protein powder with 900ml of cold water and enjoy.

Applied Nutrition Critical Mass Professional - Weight Gain Protein Powder, High Calorie Weight Gainer, Lean Mass (2.4kg - 16 Servings) (Chocolate)

Applied Nutrition Critical Mass Professional - Weight Gain Protein Powder, High Calorie Weight Gainer, Lean Mass (2.4kg - 16 Servings) (Chocolate)

Applied Nutrition

22% OffFree Shipping

Why we love it

High-quality lean mass gainz.
New formula with whey isolate.
Tested for athletic assurance.

Main Highlights

THE UK'S MOST TRUSTED MASS GAINER FOR SERIOUS SIZE & STRENGTH – Critical Mass Professional is the ultimate high-calorie weight gainer, engineered for those who want to bulk up, increase muscle mass, and fuel intense workouts. This mass gainer supplement is trusted by hard gainers, bodybuilders, and athletes looking for serious results.
1,000+ CALORIES PER SERVING – PACKED WITH HIGH-QUALITY PROTEIN & CARBS – Delivers a caloric surplus essential for lean muscle gain. Each serving contains a blend of fast-absorbing and slow-digesting proteins, including ISO-XP Whey Isolate, to maximize muscle recovery and growth. Combined with a premium carbohydrate complex, it helps sustain energy levels and support muscle glycogen replenishment.
POWERFUL CREATINE & GLUTAMINE COMPLEX FOR PERFORMANCE & RECOVERY – Enhanced with Creatine Monohydrate, Critical Mass Professional boosts strength, endurance, and muscle power output for high-intensity training. Includes L-Glutamine & Glutamic Acid, key amino acids that aid muscle recovery, reduce fatigue, and support immune function.
OPTIMAL WEIGHT GAIN FORMULA FOR HARD GAINERS & ATHLETES – Whether you struggle to put on weight, need extra calories due to intense training, or want to bulk up, this high-calorie gainer provides the perfect macronutrient balance. Ideal as a post-workout shake, meal replacement, or between-meal supplement for continuous muscle fuel.
EASY MIXING & DELICIOUS FLAVOURS FOR MAXIMUM ENJOYMENT – Designed for convenience, this instantized protein powder mixes effortlessly in water or milk, creating a smooth, creamy texture with no lumps or grittiness. Available in 6 mouth-watering flavours: Chocolate, Banana, Vanilla, Chocolate Mint, Strawberry, and White Chocolate & Raspberry.
TESTED FOR ATHLETES: at Applied Nutrition we carefully select and monitor each product through our quality management system to bring you the highest level of assurance. Critical Mass Professional is no exception and is tested at an ISO 17025 accredited lab.

Applied Nutrition Critical Mass Professional - Weight Gain Protein Powder, High Calorie Weight Gainer, Lean Mass (2.4kg - 16 Servings) (Chocolate)

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Why we love it

High-quality lean mass gainz.
New formula with whey isolate.
Tested for athletic assurance.

Main Highlights

THE UK'S MOST TRUSTED MASS GAINER FOR SERIOUS SIZE & STRENGTH – Critical Mass Professional is the ultimate high-calorie weight gainer, engineered for those who want to bulk up, increase muscle mass, and fuel intense workouts. This mass gainer supplement is trusted by hard gainers, bodybuilders, and athletes looking for serious results.
1,000+ CALORIES PER SERVING – PACKED WITH HIGH-QUALITY PROTEIN & CARBS – Delivers a caloric surplus essential for lean muscle gain. Each serving contains a blend of fast-absorbing and slow-digesting proteins, including ISO-XP Whey Isolate, to maximize muscle recovery and growth. Combined with a premium carbohydrate complex, it helps sustain energy levels and support muscle glycogen replenishment.
POWERFUL CREATINE & GLUTAMINE COMPLEX FOR PERFORMANCE & RECOVERY – Enhanced with Creatine Monohydrate, Critical Mass Professional boosts strength, endurance, and muscle power output for high-intensity training. Includes L-Glutamine & Glutamic Acid, key amino acids that aid muscle recovery, reduce fatigue, and support immune function.
OPTIMAL WEIGHT GAIN FORMULA FOR HARD GAINERS & ATHLETES – Whether you struggle to put on weight, need extra calories due to intense training, or want to bulk up, this high-calorie gainer provides the perfect macronutrient balance. Ideal as a post-workout shake, meal replacement, or between-meal supplement for continuous muscle fuel.
EASY MIXING & DELICIOUS FLAVOURS FOR MAXIMUM ENJOYMENT – Designed for convenience, this instantized protein powder mixes effortlessly in water or milk, creating a smooth, creamy texture with no lumps or grittiness. Available in 6 mouth-watering flavours: Chocolate, Banana, Vanilla, Chocolate Mint, Strawberry, and White Chocolate & Raspberry.
TESTED FOR ATHLETES: at Applied Nutrition we carefully select and monitor each product through our quality management system to bring you the highest level of assurance. Critical Mass Professional is no exception and is tested at an ISO 17025 accredited lab.

We scanned 263 products

We reviewed these offers relevant to the Mass Weight Gain Protein Powder within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Optimum Nutrition, The Bulk Protein Company, Warrior, Reflex, USN, Applied Nutrition, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Mass Weight Gain Protein Powder in the market, we considered we took a deep dive into 1316 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 16 Servings, 5.45 kg. We love many things about this product by Optimum Nutrition. What sets it apart from the competition is Supports muscle growth and performance. , Promotes muscle recovery after workouts. , Comes in 6 delicious flavours.
The best value product for most shoppers and where user satisfaction is continuously the highest is Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary by Optimum Nutrition based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Mass Weight Gain Protein Powder and the best cost-to-value ratio is The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (White Chocolate, 5kg)at The Bulk Protein Company with a 26% discount.
Our list of the best Mass Weight Gain Protein Powder is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.