Best mass in 2026

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Building lean muscle mass requires a strategic caloric surplus that can be difficult to achieve through whole foods alone. In the sports nutrition category, mass gainers provide a concentrated blend of proteins, carbohydrates, and essential micronutrients to support this growth. Our selection focuses on bioavailability, calorie density, and ingredient transparency to help you find a supplement that aligns with your specific training intensity and dietary needs.
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Best Overall
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 Serious Mass Protein Powder High...

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Best Choice
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
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  • 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
£40.00 50.00 GBP
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+11%
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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
#3
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  • 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***
£75.62 82.00 GBP
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Optimum Nutrition - Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 8 Servings, 2.73 kg, Packaging May Vary
#4
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  • 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***
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Optimum Nutrition - Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Banana, 16 Servings, 5.45 kg, Packaging May Vary
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  • 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***
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Optimum Nutrition - Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 8 Servings, 2.73 kg, Packaging May Vary
#7
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  • 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***
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The Bulk Protein Company - The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (White Chocolate, 5kg)
#8
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  • 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.
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Applied Nutrition - Applied Nutrition Critical Mass Professional - Weight Gain Protein Powder, High Calorie Weight Gainer, Lean Mass (2.4kg - 16 Servings) (Chocolate)
#9
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-21% • Prime

  • 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.
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Reflex - 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)
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  • 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)
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Our Expert Verdict: mass

AI
For those struggling to eat enough calories, these mass gainers are a practical tool. The top-rated options here balance taste with genuine nutritional density.

Market Overview: mass

AI
The market is shifting toward 'lean gainers' that offer a more balanced ratio of complex carbs to protein, moving away from sugar-heavy formulas.

Buying Guide: mass

AI
When selecting a mass gainer, prioritize the protein-to-carb ratio and the quality of the carbohydrate sources to avoid excessive sugar spikes and bloating.

Selection Criteria

Products were selected based on protein quality, calorie-per-serving value, user feedback on mixability, and the inclusion of recovery agents like creatine.

Budget Advice

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Prices vary widely. Entry-level options are available for those on a budget, while mid-range and premium formulas often include added vitamins and branded amino acids.

Conclusion: mass

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Choosing the right mass gainer depends on your current weight and caloric targets. Whether you need a heavy-duty formula or a leaner option, our detailed breakdown helps you decide. Explore the full list to find your ideal match.

Frequently Asked Questions

AI
Mass gainers provide a significant caloric surplus. If these calories exceed your daily energy expenditure and you aren't training intensely, some fat gain is possible. Adjust your serving size to match your specific caloric needs.
While they are nutrient-dense, mass gainers are designed to supplement your diet, not replace whole foods. They are most effective when used post-workout or between meals to hit high calorie targets.
Many high-quality mass gainers already include creatine in their formula. Check the ingredient label; if it's already present, adding more may not provide additional benefits for most users.

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Why Trust This List?

Data-Driven Selection

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Last updated 2 місяці тому

Independent Analysis

Objective criteria: rating, price, popularity

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

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