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5 Best Serious Mass Gainers of 2025

Last Updated - 2025/10/26

1
Best Choice

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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.

Optimum Nutrition

Gold Standard Pro Gainer | High Protein Weight Gainer Powder | 650 Calories, 60g Protein, 82g Carbohydrates | Mass Gainer & Source Vitamins & Minerals | 14 Servings, 5.09LB (Double Chocolate)

Optimum Nutrition

CA$134.99

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Main highlights
- Perfect for Daily Caloric Support: With a well-balanced blend of protein, carbohydrates, and essential nutrients, Gold Standard Pro Gainer Mass Gainer Powder is ideal for incorporating into your daily routine to help meet your nutritional goals.
- Packed with Essential Vitamins & Minerals: Gold Standard Pro Gainer includes over 20 essential vitamins and minerals, such as iron, calcium, potassium, and vitamins C & E, ensuring well-rounded nutritional support in every serving.
- High-Protein Formula with Balanced Nutrition: Gold Standard Pro Gainer features 60 grams of protein per serving along with 650 calories and 81+ grams of carbohydrates, making this an excellent option for supporting your daily caloric intake.
- Easy Mixing for On-the-Go Convenience: Whether you use a blender, shaker, or spoon, Gold Standard Pro Gainer Mass Gainer powder mixes effortlessly with water, milk, or your favourite beverage for a smooth and convenient shake.
- Delicious Flavour Options: Gold Standard Pro Gainer is available in Double Chocolate and Vanilla Custard, these rich flavours make every serving a treat you'll look forward to enjoying.
CA$134.99
2

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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.

Dymatize

Dymatize Super Mass Gainer Powder | High Protein & Carb Blend Weight Gainer | 52g Protein, 1280 Calories, 245g Carbohydrates | 16 Servings, 12LB (Rich Chocolate)

Dymatize

CA$134.74

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Main highlights
- Smooth Texture and Easy Mixing: Blends well with water, milk, or your favorite shake: Mixes into a rich, creamy consistency without clumps or grit, making it easy to enjoy anytime during the day.
- High Calorie Formula: 1280 calories per serving with a balanced mix of protein and carbohydrates: Designed for those looking to increase overall intake in a simple and structured way, this calorie-dense mass gainer helps support demanding routines or busy schedules.
- Convenient and Versatile: Great for shakes, smoothies, or calorie-dense recipes: Whether at home or on the go, this mass gainer powder fits seamlessly into your nutrition plan without complicated prep or cleanup.
- 52g Protein per Serving: Blend of fast and slow digesting protein sources: Features whey, casein, and egg protein to deliver a high-quality mix that fits into your daily routine whether used post workout or between meals.
- 245g+ Carbohydrates: Easy way to boost total energy and calorie intake: Packed with over 245 grams of carbs from multiple sources, this formula offers a convenient option for those with high energy demands or a need for extra fuel.
CA$134.74
3
Best Value

✖
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.

Mutant

Mutant Mass Extreme GainerWhey Protein PowderBuild Muscle Size and StrengthHigh Density Clean Calories12 lbsTriple Chocolate

Mutant

CA$82.99

CA$87.99
(5% Off)

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Main highlights
- MADE WITH NATURAL WHOLE FOODS | Barley, sweet potato, rolled oats, avocado, coconut oil, pumpkin seeds.
- EXTREMELY HIGH CALORIE WEIGHT GAIN | 1,270 calories per serving (4 scoops) mixed two cups of 1% milk. Two daily servings deliver 2,540 calories.
- EACH SERVING DELIVERS | 46 grams of 100% pure whey protein, 255 grams of carbohydrates, 7.5 grams of fat per serving (4 scoops) mixed with two cups of 1% milk. Naturally high in BCAAs, EAAs, Glutamine and other amino acids needed to support muscle growth from hard training.
- CRASH WEIGHT GAIN | Made for extreme hard gainers looking to add serious MASS!
- 100% GOURMET TASTE
CA$82.99
CA$87.99 (5% Off)
4

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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.

Sunshine Biopharma

Extreme Mass weight gainer muscle builder, 10 lb (4.54 kg) with less sugar for intense workout training made of high calorie fortified whey protein (Chocolate)

Sunshine Biopharma

CA$86.95

More Details
Main highlights
- Supports Lean Muscle Growth & Strength Gains; The high-protein formula provides essential amino acids to increase muscle size and strength while keeping fat gain in check.
- Optimal Nutrition for Performance & Recovery; A precise blend of whey protein, fast-digesting carbs, and essential micronutrients fuels workouts, prevents deficiencies, and sustains peak athletic performance.
- High-Calorie, Muscle-Building Formula; Delivers a massive 1,582 calories per serving, fortified with 60 g of protein, BCAAs, creatine, and essential vitamins to support intense training and consistent muscle gains.
- Enhances Glycogen Replenishment & Nitrogen Retention; The balanced macronutrient profile helps restore muscle energy stores post-workout, ensuring continuous growth and endurance.
- Accelerates Recovery & Reduces Muscle Breakdown; BCAAs, creatine, and glutamine promote rapid muscle repair and minimize post-workout soreness, ensuring you’re ready for your next training session.
CA$86.95
5

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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.

MAMMOTH

MAMMOTH MASS: Weight Gainer, High Calorie Protein Powder Workout Smoothie Shake, Meal Replacement, Low Sugar, Whey Isolate Concentrate, Casein Protein Blend, Weight Training, High Protein 15 lb, Vanilla

MAMMOTH

CA$109.99

More Details
Main highlights
- REVOLUTIONARY MASS GAINER FORMULA: Mammoth Mass contains 60 grams of High Quality Protein compromised of whey protein concentrate, whey protein isolate & miscellar casein. There is over 39 grams of combined BCAA Glutamine and Essential Amino Acids Clean Carb Complex features.
- QUALITY NUTRITION: Putting on size requires a balance of heavy training and quality nutrition. Because everyone’s a little different, some have a harder time packing on muscle than others. Mammoth Mass is a high-protein powdered mix delivering significant amount of supplemental protein, carbs, vitamins and minerals to build on the amount you're getting from a balanced diet of food.
- PROTEIN SHAKES AND RECIPES: Mammoth mass weight gainer protein is versatile in making protein shakes, smoothies and recipes. Boost calories and nutrition by adding to protein bars, cookies and other recipes.
- MUSCLE MASS FORMULA: MAMMOTH MASS Weight Gainer provides more protein, better carbs and far less sugar giving you more of what you want in a potent mass muscle building formula. With 60 grams of the finest whey protein isolate, whey protein concentrate, micellar casein and calcium caseinate available.
- CALORIES: To gain just one extra pound, you need to consume approximately 3,500 calories-above and beyond what you normally consume through foods, beverages, and supplements. Pro Gainer provides over 1250 calories per serving. By adding just one serving to your daily routine, you can begin to experience an increase in lean mass within the first week.
CA$109.99

5 Best Serious Mass Gainers of 2025

Gold Standard Pro Gainer | High Protein Weight Gainer Powder | 650 Calories, 60g Protein, 82g Carbohydrates | Mass Gainer & Source Vitamins & Minerals | 14 Servings, 5.09LB (Double Chocolate)

Dymatize Super Mass Gainer Powder | High Protein & Carb Blend Weight Gainer | 52g Protein, 1280 Calories, 245g Carbohydrates | 16 Servings, 12LB (Rich Chocolate)

Mutant Mass Extreme GainerWhey Protein PowderBuild Muscle Size and StrengthHigh Density Clean Calories12 lbsTriple Chocolate

Extreme Mass weight gainer muscle builder, 10 lb (4.54 kg) with less sugar for intense workout training made of high calorie fortified whey protein (Chocolate)

MAMMOTH MASS: Weight Gainer, High Calorie Protein Powder Workout Smoothie Shake, Meal Replacement, Low Sugar, Whey Isolate Concentrate, Casein Protein Blend, Weight Training, High Protein 15 lb, Vanilla

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