Best Fast Weight Gainer For Men of 2025
Last updated on 27/09/2025
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1
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 16 Servings, 5.45 kg
Optimum Nutrition
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Optimum Nutrition
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 16 Servings, 5.45 kg
12% 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
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Value for Money
2
The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA
The Bulk Protein Company
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The Bulk Protein Company
The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA
6% 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
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3
Kinetica Sports OatGain Weight Gainer - Chocolate Caramel Flavour | 620 Cal, 47g Protein & 78g Carbs/Serve, 15 Serving/2.4Kg | Optimum Grass Fed Protein Supplement | High Calorie & Easy Mixability
Kinetica
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Kinetica
Kinetica Sports OatGain Weight Gainer - Chocolate Caramel Flavour | 620 Cal, 47g Protein & 78g Carbs/Serve, 15 Serving/2.4Kg | Optimum Grass Fed Protein Supplement | High Calorie & Easy Mixability
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Why we love it
- Delicious Chocolate Caramel Nut.
- Easy to mix.
- Repairs muscles, replenishes energy.
Main Highlights
- Irresistible Flavour for Maximum Enjoyment: Kinetica Sports OatGain Mass Gainer comes in two mouthwatering flavours: Chocolate Caramel Nut and Raspberry Yoghurt. Each delivers a rich, satisfying taste and aroma, making it easy and enjoyable to fuel your body with extra calories and nutrients to support high training loads.
- Smooth & Easy Mixability: Experience hassle-free mixing with Kinetica Sports OatGain Weight Gainer. Whether you prefer water, milk, or milk alternatives, our mass gainer powder mixes easily with milk or water for a high protein, high calorie shake in seconds.
- High-Calorie Fuel for Muscle & Energy: Each serving of Kinetica Sports OatGain mass gainer provides 600+ calories and 46g of protein to help you gain weight, increase overall muscle mass and replenish your energy stores, making it ideal for intense workouts and recovery. Kinetica Sports Oatgain mass gainer contains only 6.4g of sugar per serving.
- Convenient & Versatile for Any Lifestyle: Kinetica OatGain weight gainer is perfect for anyone looking to intake a high volume of calories for weight gain or energy regeneration. It’s suitable for vegetarians and can be used as a post-workout shake, meal replacement, or mid-day snack. Simply mix one serving with water, milk, or your preferred beverage for a quick and nutritious option.
- Quality Assured & Batch-Tested for Safety: Kinetica Sports OatGain mass gainer is batch-tested under the Informed-Sport testing program to ensure that every batch complies with WADA’s high standards. You can trust that OatGain is free from banned substances and made with quality ingredients to fuel your training safely and effectively.
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4
Dymatize Super Mass Gainer Rich Chocolate 2943g - Weight-Gainer Pulver + Kohlenhydrate, BCAAs und Casein
Dymatize
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Dymatize
Dymatize Super Mass Gainer Rich Chocolate 2943g - Weight-Gainer Pulver + Kohlenhydrate, BCAAs und Casein
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Why we love it
- High-quality protein benefits muscle growth.
- Reduces tiredness and fatigue.
- Assurance of highest product quality.
Main Highlights
- OUR MASSIVE COMBINATION of creatine, carbohydrates, BCAAs and proteins provides valuable nutrients to meet the particular needs of your bulking phase
- DEVELOPED SPECIALLY FOR BODYBUILDERS, hardgainers and powerlifters and their specific needs, Protein Weight Gainer provides appropriate calories and nutrients, especially in the bulking phase
- EVERY SERVING of Super Mass Gainer provides up to 243 g of carbohydrates, 52 g of protein, 11–12 g of BCAAs and 3 g of fine Creapure creatine, as well as five vitamins to help reduce tiredness
- ACCORDING TO INFORMED CHOICE, every substance in the Mass Gainer powder is of the highest standard, so athletes can rest easy knowing their product is top quality, especially during competitions
- FOR BEST RESULTS when bulking, mix one serving in 700 ml of water every day after training. The mass gainer protein shake is gluten free and suitable for vegetarians
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5
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Vanilla Ice Cream, 4.35kg)
Reflex
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Reflex
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Vanilla Ice Cream, 4.35kg)
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Why we love it
- Optimal muscle-building protein blend.
- Includes digestive enzymes, vitamins.
- Grass-fed, hormone-free ingredients.
Main Highlights
- All-in-One Weight Gainer To Simplify Your Supplement Routine: One Stop Xtreme has been formulated to replace the use of numerous supplements, allowing you to take only one protein shake to support muscle growth alongside a balanced healthy diet
- High-performing Weight Gain Shake: One Stop Extreme high protein powder delivers a hit of protein, creatine, BCAAs and other beneficial nutrients to bodybuilders looking to make gains - contributing to the growth and maintenance of muscle mass
- Boosting Stregth and Endurance: Reflex mass gainer protein powder contains creatine, that increases physical performance in successive bursts of short-term, high intensity exercise - With LAB2PRO friendly bacteria and Digezyme digestive enzymes
- Nutritional Excellence: contains L-Leucine, Beta Alanine, Betaine Anhydrous and Taurine, along with essential vitamins and minerals aiding the maintenance of normal protein synthesis, function of the immune system and testosterone production
- Premium Ingredients: Reflex only uses whey protein sourced from grass-fed cows, ensuring a high-quality weight gain protein powder that mixes well, with a smooth texture and a delicious taste
- Produced in an Informed Sport Registered Facility: Suitable for vegetarians and Halal certified - Hormone-free, zero added sugars, artificial colors or soy protein, assuring a conscientious choice of food supplements for weight gain
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6
USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Strawberry Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth, Post Workout Recovery Drink Mix
USN
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USN
USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Strawberry Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth, Post Workout Recovery Drink Mix
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Why we love it
- High protein content ensures growth.
- Enhances physical performance substantially.
- Includes industry-leading nutrition formula.
Main Highlights
- USN Muscle Fuel Anabolic protein drink mix: High protein shake powder with Vitamins, Minerals, Carbohydrates, BCAAs, Amino Acids and Creatine. Premium dietary supplement designed to support muscle building
- Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
- Mass gainer protein powder: Strawberry flavoured drink powder with 54g of premium quality protein, 77g of carbohydrates and 850mg of HMB to support muscle recovery, growth and performance
- Reach your goals: All in one muscle gain building stack, combined with raw creatines and carbohydrates, so creatine is easily absorbed and transported around the body. Easy to mix with water
- Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout
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7
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73 kg, Packaging May Vary
Optimum Nutrition
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Optimum Nutrition
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73 kg, Packaging May Vary
11% OffFree Shipping
Why we love it
- Boosts muscle growth and performance.
- Supports muscle recovery effectively.
- Delicious variety of flavours.
Main Highlights
- CALORIE RICH PROTEIN SOURCE – the ultimate gainer powder which can be used post-workout or between meals
- SUPPORTS SERIOUS SIZE – great for those aspiring to be bigger, for those who find it hard to gain weight / muscle, or for those on the go who have high caloric needs due to intense training
- 1,255-1272 CALORIES per serving – when mixed with water
- 50 g – 53 g PROTEIN per serving
- 250 g+ CARBOHYDRATES per serving
- ADDED CREATINE, L-GLUTAMINE & GLUTAMIC ACID
- INSTANTISED POWDER – helps the powder dissolve easily and mixes well in a blender with other ingredients such as fruit and nut butters for added calories
- 24 VITAMINS & MINERALS per serving
- NO ADDED SUGAR
- AVAILABLE IN 6 LB TUBS OR 12 LB BAGS
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8
USN Wholefood Muscle Gain Protein Powder, Chocolate Flavour - 2kg, Natural Muscle Growth & Mass Gainer, All-in-One 30g Vegan Protein Powder, Meal Replacement & Dietary Supplement Protein Shake Mix
USN
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USN
USN Wholefood Muscle Gain Protein Powder, Chocolate Flavour - 2kg, Natural Muscle Growth & Mass Gainer, All-in-One 30g Vegan Protein Powder, Meal Replacement & Dietary Supplement Protein Shake Mix
6% OffFree Shipping
Why we love it
- Plant-based macro nutrition choice.
- Efficient vegan muscle gainer.
- Delicious and easily mixed.
Main Highlights
- USN Wholefood Muscle Gain Protein Powder: The high-protein shake mix, made with premium whole foods, helps support physical performance during exercise and workouts
- Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
- Post workout mass gainer: Chocolate flavoured protein drink powder with 30g of vegan protein per serving. Added carbohydrates help replenish glycogen, to help support muscle growth and performance
- 100% plant based vegan supplements: Vegan friendly, dairy-free and zero soy. All in one muscle gain building stack, also helps to encourage faster recovery after a heavy gym session
- Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout
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9
USN Hyperbolic Mass Strawberry Cheesecake 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
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USN
USN Hyperbolic Mass Strawberry Cheesecake 2kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar
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Why we love it
- Balanced nutrition for muscle growth.
- High in calories and protein.
- Delicious, smooth strawberry flavor.
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 strawberry 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.
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10
Extreme Weight Gain Anabolic & Appetite Stimulant Bundle – Weight Gainer for Women & Men - Fast Mass Gainer Supplement & Muscle Growth Pills – Made in The UK
OZUNA NUTRITION
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OZUNA NUTRITION
Extreme Weight Gain Anabolic & Appetite Stimulant Bundle – Weight Gainer for Women & Men - Fast Mass Gainer Supplement & Muscle Growth Pills – Made in The UK
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Why we love it
- Promotes rapid, healthy weight gain.
- Enhances appetite and nutrient absorption.
- Ideal for both genders.
Main Highlights
- WEIGHT GAIN & APPETITE STIMULANT BUNDLE: Our Extreme Weight Gain and Apt-Enhance bundle delivers a powerhouse combination for those looking to increase weight, muscle mass, boost appetite and overall caloric intake effectively.
- EXTREME WEIGHT GAIN SUPPORT: Crafted with Creatine Monohydrate, L-Leucine, and Glutamine, this potent formula supports muscle growth, strength, and quicker recovery. Designed with pure ingredients—free from additives, fillers, or binders—to help you achieve your mass-building goals.
- APT-ENHANCE APPETITE BOOSTER: Ozuna Apt-Enhance is formulated to stimulate appetite, improve digestion, and optimize nutrient absorption, making it easier to consume more calories. With science-backed ingredients, including Betaine HCl and Alfalfa to promote effective weight gain by increasing hunger and caloric intake.
- CONVENIENT HIGH-STRENGTH FORMULA: Featuring easy-to-swallow capsules and tablets packed with active ingredients, this bundle ensures powerful performance in a simple, convenient form.
- SUITABLE FOR ALL: Designed for both men and women, this bundle is vegetarian-friendly and manufactured in the UK to the highest quality standards.
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