9 Best gnc weight gainer in Canada

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Last Updated - 2026/03/20

Best Choice

01
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)
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.
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9.8

Exceptional

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Value for Money

02
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)
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.
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9.7

Exceptional

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03
Mutant

Mutant Mass Extreme Gainer Whey Protein Powder, Build Muscle Size & Strength with High-Density Clean Calories, (Triple Chocolate, 6 LBS)

8.4 worth the money

8.2 Taste
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
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9.5

Excellent

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04
Mutant

Mutant Mass Extreme Gainer Whey Protein Powder, Build Muscle Size & Strength with High-Density Clean Calories, (Triple Chocolate, 6 LBS)

8.4 worth the money

8.2 Taste
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
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9.3

Excellent

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05
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

9.5 worth the money

8.9 Taste
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.
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9.0

Excellent

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06
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

9.5 worth the money

8.9 Taste
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.
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8.7

Very Good

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07
Sunshine Biopharma

Sunshine Biopharma’s Extreme Mass Gainer, 12 Servings (375g), 1582 Cal & 60g Protein, Bulk High-Calorie Serving for Muscle Builder & Weight Gainer
Main highlights

SWEETENERS: Extreme Mass Gainer is sweetened with Stevia, a natural sweetener very commonly used. To equilibrate the taste, it contains a minute amount of Sucralose (10 mg). All these products are approved by Health Canada and the FDA, and the major scientific studies proved them as safe and armless to human
HYPERTROPHY ARCHITECTURE: The 10lb foundation is engineered for the athlete committed to a total physiological transformation. Achieving massive scale requires a consistent, multi-week caloric surplus that resets your body’s weight set-point
GLYCOGEN RESYNTHESIS MATRIX: Loaded with complex carbohydrates to rapidly replenish depleted muscle fuel tanks. By ensuring your glycogen levels are fully saturated, you prevent the body from entering a catabolic, muscle-wasting state
60G PROTEIN: Build and repair muscle with a heavy-duty 60g dose of protein per shake. This high-potency amino acid profile ensures that your 1,500+ calorie intake is utilized for maximum muscle protein synthesis and recovery, rather than just empty caloric storage
1582 CALORIES PER SERVING: Stop struggling to hit your caloric surplus. Each massive 375g serving delivers 1,582 nutrient-dense calories, engineered to force your body into a growth state. This is the literal solution for hard gainers and athletes with high-intensity caloric demands who cannot meet their needs through whole food alone
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8.6

Very Good

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08
Sunshine Biopharma

Sunshine Biopharma’s Extreme Mass Gainer, 12 Servings (375g), 1582 Cal & 60g Protein, Bulk High-Calorie Serving for Muscle Builder & Weight Gainer
Main highlights

SWEETENERS: Extreme Mass Gainer is sweetened with Stevia, a natural sweetener very commonly used. To equilibrate the taste, it contains a minute amount of Sucralose (10 mg). All these products are approved by Health Canada and the FDA, and the major scientific studies proved them as safe and armless to human
HYPERTROPHY ARCHITECTURE: The 10lb foundation is engineered for the athlete committed to a total physiological transformation. Achieving massive scale requires a consistent, multi-week caloric surplus that resets your body’s weight set-point
GLYCOGEN RESYNTHESIS MATRIX: Loaded with complex carbohydrates to rapidly replenish depleted muscle fuel tanks. By ensuring your glycogen levels are fully saturated, you prevent the body from entering a catabolic, muscle-wasting state
60G PROTEIN: Build and repair muscle with a heavy-duty 60g dose of protein per shake. This high-potency amino acid profile ensures that your 1,500+ calorie intake is utilized for maximum muscle protein synthesis and recovery, rather than just empty caloric storage
1582 CALORIES PER SERVING: Stop struggling to hit your caloric surplus. Each massive 375g serving delivers 1,582 nutrient-dense calories, engineered to force your body into a growth state. This is the literal solution for hard gainers and athletes with high-intensity caloric demands who cannot meet their needs through whole food alone
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8.5

Good

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09
Sunshine Biopharma

Sunshine Biopharma’s Extreme Mass Gainer, 6 Servings (375g), 1582 Cal & 60g Protein, a Strategic Serving Count for Intense Workout & Muscle building
Main highlights

SWEETENERS: Extreme Mass Gainer is sweetened with Stevia, a natural sweetener very commonly used. To equilibrate the taste, it contains a minute amount of Sucralose (10 mg). All these products are approved by Health Canada and the FDA, and the major scientific studies proved them as safe and armless to human
PROFESSIONAL UTILITY DESIGN: The Extreme Mass 5lb focuses on physiological output. It delivers the industry's highest calorie-per-serving ratio in a performance-first package, engineered for the serious trainee who demands a functional, high-density substrate to support extreme physical exertion
INTENSIVE RECOVERY: Highly recommended during "Deload" weeks or immediately following maximal-effort competition. Force-feed nutrients into exhausted muscle tissue to prevent post-strain catabolism and jumpstart the remodeling process
60G PROTEIN: Every serving delivers a massive 60g of high-bioavailability protein to activate mTORC1 signaling and ensure structural repair. By pairing a complete amino profile with high-density carbohydrates, this formula directs your caloric surplus toward skeletal muscle hypertrophy rather than adipose storage
1582 CALORIES PER SERVING: Stop struggling to hit your caloric surplus. Each massive 375g serving delivers 1,582 nutrient-dense calories, engineered to force your body into a growth state. This is the literal solution for hard gainers and athletes with high-intensity caloric demands who cannot meet their needs through whole food alone
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8.4

Good

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