Best Mass Gainer in Canada (2026): 7 Top Picks for Hard Gainers

By Bulldog Nutrition Editorial Team | Updated: May 2026

If you're training consistently and eating as much as you can but still not gaining weight — you're a hard gainer. The solution isn't to train harder. It's to eat more, consistently, and a mass gainer is the most efficient way to hit a caloric surplus when whole food alone isn't cutting it.

Mass gainers are not magic. They're concentrated food — high-quality calories in powder form designed to close the gap between what you're eating and what your body needs to add muscle. The difference between a good mass gainer and a poor one comes down to the quality of those calories: protein source, carbohydrate composition, and what's not in the formula.

We've reviewed every mass gainer in Bulldog Nutrition's current lineup and ranked the seven that deliver on quality, caloric density, and value for Canadian buyers. Browse the full mass gainer collection or read on for the breakdown.

How Much Do You Actually Need from a Mass Gainer?

The science is clear on protein requirements for muscle growth. A landmark meta-analysis by Morton et al. (2018) in the British Journal of Sports Medicine — analyzing 49 studies and 1,863 participants — found that protein supplementation significantly increased muscle mass and strength gains during resistance training, with the optimal intake falling around 1.62g per kilogram of body weight per day.¹

The International Society of Sports Nutrition (ISSN) position stand on nutrient timing, published by Kerksick et al. (2017) in the Journal of the International Society of Sports Nutrition, recommends consuming protein alongside carbohydrates in the post-workout window — a combination that drives glycogen replenishment and amplifies the muscle protein synthesis response from training.²

For a hard gainer weighing 80kg: target 130g+ protein and a 500+ calorie daily surplus above maintenance. A quality mass gainer providing 1,250 calories and 60g protein per serving covers nearly half that protein target and a substantial chunk of the caloric surplus in a single shake. That's the utility of a mass gainer done right.

Types of Mass Gainer Supplements

Type	Calories/Serving	Best For	Carb Source
High-Calorie Gainer	1,000–1,300+	Ectomorphs, extreme hard gainers, off-season bulking	Maltodextrin + whole food complex
Clean/Lean Gainer	600–900	Lean bulking, minimizing fat gain, athletes	Oats, sweet potato, quinoa, brown rice
Beginner Gainer	600–800	First-time supplementers, smaller caloric deficit	Mixed carbohydrate blend

Best Mass Gainers Canada 2026: At a Glance

Product	Calories	Protein	Size	Best For
Dymatize Super Mass Gainer 12lbs	1,310	52g	12lbs	Best Overall
ANS N-Mass 15lbs	1,300	55g	15lbs	Best Extreme Bulking
Basic Mass Gainer 15lbs	~1,050	59g	15lbs	Best Value
Rivalus Clean Gainer 10lbs	~750	~50g	10lbs	Best Clean Formula
Nutrabolics HydroMass 7.5lbs	~800	~50g	7.5lbs	Best Lean Bulk
Optimum Serious Mass 6lbs	~1,250	50g	6lbs	Best for Beginners
Perfect Sports Hulk 10lbs	1,030	~52g	10lbs	Best Canadian Brand

*Nutritional figures per serving. Some values approximate — check current label for exact macros as formulas may change.

Shop Canada's best mass gainers → View the full collection at Bulldog Nutrition

The 7 Best Mass Gainers in Canada (2026 Rankings)

1. Dymatize Super Mass Gainer (12lbs) — Best Overall

Best for: Serious hard gainers who want a premium, banned-substance-tested high-calorie gainer

• 1,310 calories per serving — one of the highest calorie-per-serving gainers in Canada
• 52g protein per serving from a whey + casein blend (fast and slow-release amino acids)
• 10.7g BCAAs including 5.1g leucine — above the threshold for maximal muscle protein synthesis stimulation
• 252g carbohydrates per serving — dense glycogen replenishment for hard-training athletes
• 14 vitamins and minerals per serving
• Banned substance tested — safe for competitive athletes

Dymatize Super Mass Gainer is engineered for one purpose: putting serious size on hard gainers who struggle to hit a caloric surplus through whole food alone. At 1,310 calories per serving, this is a tool for athletes who have maximized their food intake and still can't eat enough to support the mass gain their training demands. The protein matrix combines fast-digesting whey for immediate post-workout amino acid delivery with slow-digesting casein for sustained release over several hours — covering both the acute recovery window and the extended muscle-building period between meals.

The 10.7g BCAA profile, including 5.1g leucine, sits comfortably above the threshold associated with maximal muscle protein synthesis in the research literature. The 14 included vitamins and minerals mean you're not creating micronutrient deficiencies while pursuing a caloric surplus. And the banned substance testing — the same standard Dymatize applies across their entire performance range — makes this one of the safest high-calorie gainers available in Canada for competitive athletes.

Authorized Canadian and US retailer: Shop Dymatize Super Mass Gainer at Bulldog Nutrition →

2. ANS Performance N-Mass (15lbs) — Best for Extreme Bulking

Best for: Maximum caloric density for extreme hard gainers and off-season powerlifters

• 1,300 calories per serving — one of the highest calorie-per-serving mass gainers available in Canada
• 55g protein per serving
• 250g carbohydrates per serving
• 9g fat per serving
• Added creatine monohydrate (strength and power support)
• Appelin™ (appetite stimulation complex)

ANS Performance is a Canadian brand, and N-Mass is their answer to the question “how do I eat enough calories when I genuinely cannot force in more food?” At 1,300 calories per serving, this is one of the most calorie-dense mass gainers available in Canada. The carbohydrate load (250g per serving) is substantial — appropriate for extreme hard gainers or serious athletes in a dedicated mass-building phase.

The addition of creatine monohydrate is a genuine bonus — it's one of the most well-researched performance supplements in existence, and getting it built into your mass gainer simplifies your stack. The Appelin™ appetite-stimulation complex addresses one of the most common hard gainer problems: the inability to actually consume enough food. If you're consistently under-eating because you're genuinely not hungry, N-Mass is built for you.

Authorized Canadian and US retailer: Shop ANS N-Mass 15lbs at Bulldog Nutrition →

3. Basic Mass Gainer (15lbs) — Best Value

Best for: Hard gainers who want maximum value per dollar from a Canadian brand

• 59g protein per serving
• 187g carbohydrates per serving
• Premium protein blend: whey concentrate, whey isolate, whey hydrolysate, and micellar casein
• Carbohydrate sources include maltodextrin, sweet potato, quinoa, and oat fibre
• Added coconut oil powder, MCTs, and flaxseed oil powder for healthy fats
• 15lbs — substantial supply

Basic Supplements is a Canadian brand built on the no-nonsense principle: excellent ingredients, transparent labeling, and accessible pricing. The Basic Mass Gainer formula punches above its price point, combining a four-source protein blend (whey concentrate, isolate, hydrolysate, casein) with a mixed carbohydrate matrix that includes real food sources alongside maltodextrin. The added MCTs and flaxseed oil provide healthy fat contributions that most mass gainers skip entirely.

At 59g protein per serving, it delivers comparable protein density to premium gainers while coming in at slightly lower calories — making it a useful option if you're hitting your caloric targets reasonably close but still need the protein volume. For Canadians who want to support a domestic brand without compromising on formula quality, Basic Mass Gainer is the straightforward choice.

Authorized Canadian and US retailer: Shop Basic Mass Gainer 15lbs at Bulldog Nutrition →

4. Rivalus Clean Gainer (10lbs) — Best Clean Formula

Best for: Athletes who want to minimize fat gain and prioritize lean mass

• ~750 calories per serving
• ~50g protein per serving
• Clean carbohydrate sources — no excessive maltodextrin
• “Complete nutritional spectrum” formula with protein, carbs, and healthy fats
• Rivalus is Canadian — committed to clean formulations

Rivalus is a Canadian brand with a strong reputation for premium, clean-label supplement formulations. Clean Gainer prioritizes formula quality over raw caloric density — at ~750 calories per serving, it's positioned as a lean-bulk tool rather than an extreme caloric surplus driver. The carbohydrate sources are thoughtfully chosen to avoid the insulin spike-crash cycle common with pure maltodextrin-based mass gainers.

Clean Gainer is the right pick if you're an athlete who can't afford to get soft — strength athletes, rugby players, competitive lifters who need to add mass without sacrificing conditioning. The moderate caloric density lets you control your surplus more precisely than 1,300-calorie-per-serving products while still covering the gap between whole-food intake and your mass-building targets.

Authorized Canadian and US retailer: Shop Rivalus Clean Gainer 10lbs at Bulldog Nutrition →

5. Nutrabolics HydroMass (7.5lbs) — Best Lean Bulk Option

Best for: Lean bulk phases where caloric precision matters

• ~800 calories per serving
• Real food ingredient profile — whole food carbohydrate sources
• Clean protein blend
• Moderate caloric density — ideal for controlled surplus
• Nutrabolics is a Canadian brand based in Montreal

Nutrabolics is a Montreal-based Canadian supplement brand with a 20+ year track record in the Canadian market. HydroMass is their mass gainer built for a modern, health-conscious approach to gaining — real food ingredients, clean carbohydrate sources, and moderate caloric density that lets you dial in your surplus without overshooting. The 7.5lb size makes it accessible for athletes who want to trial a mass gainer before committing to a 15lb tub.

The emphasis on real food ingredients is consistent with Nutrabolics' broader brand philosophy of “nutrition science first.” For Canadian athletes who want a lean bulk approach — maintaining definition while gradually adding mass — HydroMass provides the caloric support without the excess that leads to unnecessary fat accumulation.

Authorized Canadian and US retailer: Shop Nutrabolics HydroMass at Bulldog Nutrition →

6. Optimum Nutrition Serious Mass (6lbs) — Best for Beginners

Best for: First-time mass gainer users who want a proven, globally trusted formula

• ~1,250 calories per serving
• 50g protein per serving (whey protein blend)
• Vitamins and minerals included — micronutrient support
• 25 vitamins and minerals per serving
• The world's #1 selling mass gainer brand
• 6lbs — ideal trial size before committing to 15lbs

Optimum Nutrition's Serious Mass is the global reference point for mass gainer supplements — it's been the benchmark for over a decade, and for good reason. The formula delivers 1,250 calories and 50g protein per serving with an added vitamin and mineral complex that most mass gainers skip. For Canadians new to mass gainers, the 6lb size is an accessible entry point that doesn't require committing to a 15lb bag before you know how your body responds.

Serious Mass is a pure high-calorie gainer — the carbohydrate profile leans toward maltodextrin rather than whole-food sources, which is something to be aware of if blood sugar management is a concern. For genuine hard gainers whose primary goal is caloric volume, it's a proven formula from the world's most trusted protein brand.

Authorized Canadian and US retailer: Shop ON Serious Mass at Bulldog Nutrition →

7. Perfect Sports Hulk Clean Mass Gainer (10lbs) — Best Canadian Brand

Best for: Canadians who want to support a Canadian brand with a clean, whole-food formula

• 1,030 calories per full serving (4 scoops)
• 50g protein per serving (whey protein isolate + concentrate blend)
• ModCarb® complex carbohydrate matrix — gluten-free oats and ancient grains, no added sugar
• 11 concentrated fruit and vegetable sources per serving
• Made in Canada — GMP-certified facility, gluten-free, virtually lactose-free

Perfect Sports is a Canadian supplement company with a reputation for clean, well-dosed products across their lineup. Hulk Clean Mass Gainer lives up to the “clean” designation — whole food carbohydrate sources, a solid protein blend, and no excessive fillers. At 1,030 calories per full serving, it occupies the moderate-to-high caloric density range — appropriate for athletes who need meaningful mass support without going to the extremes of a 1,300-calorie gainer.

For Canadian consumers who prefer to buy Canadian, Perfect Sports is one of the few domestic brands that competes on formula quality against international mass gainer brands — not just on price. The 10lb size is a useful middle ground between trial sizes and the 15lb format.

Authorized Canadian and US retailer: Shop Perfect Sports Hulk at Bulldog Nutrition →

How to Choose a Mass Gainer in Canada

Know your caloric target first. Calculate your maintenance calories (body weight in lbs × 15 is a rough starting estimate) and add 300–500 calories for a lean bulk or 500–750 for an aggressive surplus. Choose a mass gainer that covers that gap — don't reflexively grab the highest-calorie option if you don't need it.

Evaluate the carbohydrate source. Pure maltodextrin mass gainers are cheap to produce and cause large blood sugar spikes. Whole-food carbohydrate sources (oats, sweet potato, quinoa, brown rice) digest more steadily and provide genuine nutritional value beyond pure caloric contribution. Dymatize Super Mass Gainer, Basic Mass Gainer, and ANS N-Mass all use mixed carbohydrate sources.

Check the protein blend. Multi-source protein blends (whey isolate + concentrate + casein) provide both fast and slow-release amino acids — maximizing the muscle protein synthesis window. Blends outperform single-source mass gainer proteins for hard gainers who are taking their supplement as a meal replacement or substantial post-workout shake.

Factor in the caloric contribution from whole foods. A mass gainer is one component of your total daily intake, not your entire diet. Athletes eating primarily whole foods + one mass gainer shake per day will achieve better body composition outcomes than those relying entirely on supplements for caloric surplus.

When to Take a Mass Gainer

The optimal timing for a mass gainer shake aligns with when your muscles most need caloric fuel: post-workout and as a breakfast or pre-sleep meal for additional caloric volume. Research by Phillips and Van Loon (2011) in the Journal of Sports Sciences established that athletes performing resistance training require 1.3–1.8g protein per kilogram of body weight daily — and that protein distribution across multiple meals maximizes anabolic response.³ Using a mass gainer shake as one of those structured protein + carbohydrate meals ensures consistent amino acid delivery across the day.

Avoid replacing all meals with mass gainer shakes. Whole food provides micronutrients, fiber, and satiety signals that powders don't fully replicate. The ideal use case: 1 mass gainer shake per day (post-workout or between meals), with the remainder of your caloric intake from whole foods.

Frequently Asked Questions — Mass Gainers Canada

Do mass gainers actually work for building muscle?
Yes — when they help you consistently achieve a caloric surplus you couldn't otherwise maintain. Mass gainers are concentrated whole-food calories in powder form. If eating enough food to support muscle growth is your limiting factor, a mass gainer removes that barrier. The muscle growth itself comes from progressive resistance training and adequate protein — the mass gainer provides the caloric and protein fuel to make that possible.

Will mass gainers make me fat?
Any sustained caloric surplus will result in some fat gain alongside muscle gain — this is the nature of a bulking phase. The key is choosing a mass gainer with quality carbohydrate sources (oats, sweet potato, quinoa rather than pure maltodextrin), controlling your total daily surplus (300–500 calories over maintenance for a lean bulk), and maintaining resistance training intensity. A quality mass gainer supports muscle-biased weight gain rather than fat-biased weight gain.

How much protein do I need when bulking?
A meta-analysis of 49 studies (Morton et al., 2018, BJSM) found optimal protein intake for muscle gain at approximately 1.62g per kilogram of body weight per day. For an 80kg person, that's roughly 130g protein daily. Most mass gainers provide 50–60g protein per serving, covering 40–50% of this target in one shake — leaving the remainder easily achievable through regular meals.

Can I mix a mass gainer with milk instead of water?
Yes, and mixing with whole milk adds approximately 150 calories, 8g protein, and 12g carbohydrates per 250ml — a meaningful caloric boost. For extreme hard gainers, milk mixing is a common strategy to push per-serving calories even higher. Use water if you're lactose-sensitive or trying to control your macro tracking more precisely.

Is Dymatize Super Mass Gainer or ANS N-Mass better?
Dymatize Super Mass Gainer is the premium pick — banned substance tested, 1,310 calories, and a whey + casein protein matrix with 10.7g BCAAs covering both fast and slow-release absorption. ANS N-Mass is the choice if you genuinely cannot gain weight despite eating a lot — the added creatine monohydrate and the Appelin™ appetite stimulation complex address specific hard gainer barriers that standard mass gainers don't.

Are mass gainers suitable for women?
Yes — the caloric and protein requirements for women building muscle are lower than for larger male athletes, but a hard-gaining woman who consistently under-eats relative to her training load will benefit from a mass gainer just as a man would. The key is scaling the serving size to your actual caloric target — half a serving provides half the calories, which may be more appropriate. Consult with a registered dietitian if you're unsure about caloric targets.

How long does a 15lb mass gainer last?
A 15lb mass gainer provides approximately 20–25 servings at a standard 4-scoop dose. Used once daily, that's 3–4 weeks of supply. At twice daily, roughly 10–12 days. ANS N-Mass and Basic Mass Gainer at 15lbs represent a full month's supply for most users taking one serving per day.

Do I need a mass gainer if I'm already eating enough?
No. Mass gainers are for people who are failing to hit their caloric and protein targets through whole food alone. If you're already in a caloric surplus and gaining weight at an appropriate rate (0.25–0.5kg per week for a lean bulk), adding a mass gainer will simply push you into excess surplus — resulting in faster fat gain without additional muscle benefit. First calculate your maintenance calories and confirm you're actually under-eating before adding a mass gainer.

Research References

1. Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52(6):376–384. doi:10.1136/bjsports-2017-097608
2. Kerksick CM, Arent S, Schoenfeld BJ, et al. International society of sports nutrition position stand: nutrient timing. J Int Soc Sports Nutr. 2017;14:33. doi:10.1186/s12970-017-0189-4
3. Phillips SM, Van Loon LJ. Dietary protein for athletes: From requirements to optimum adaptation. J Sports Sci. 2011;29 Suppl 1:S29–38. doi:10.1080/02640414.2011.619204

Ready to add serious mass? Bulldog Nutrition is an authorized Canadian and US retailer for every product on this list — sourced directly from the brands. Fast shipping across Canada and the United States. See our complete guide to the best protein powders in Canada if you're looking for standard protein supplementation rather than a mass-building formula.

Shop the best mass gainers in Canada at Bulldog Nutrition →