Finishing a large, calorie-dense shake day after day is a challenge in itself, especially when the formula tastes like chalk or sits heavily in your stomach. Many mass gainers make the problem worse by loading up on simple sugars and cheap fillers to hit a calorie number, leaving you with a bloated feeling instead of clean energy.
A good mass gainer supplement solves this by providing a high-calorie serving built on a foundation of quality protein and complex carbohydrates, with a taste and texture you can tolerate long-term. I analyzed the Best Mass Gainer Supplements to identify products with a balanced macro profile and a mixability that fits into a real training routine.
My overall pick for best mass gainer supplements is the Optimum Nutrition Serious Mass Weight Gainer. It combines a substantial protein dose with a high-calorie count from a blend of carbohydrates, and it mixes smoothly without the gritty texture that plagues some formulas. My top picks are just below.
Our Top Picks
| Product | NC Score | ||
|---|---|---|---|
| Best Overall Dymatize Super Mass Gainer with 52g Protein and 1g | 9.9 | Check Price on Amazon | |
| Best for aggressive calorie goals Dymatize Super Mass Gainer with 52g Protein | 9.8 | Check Price on Amazon | |
| Best for budget price Optimum Nutrition Serious Mass Weight Gainer | 9.7 | Check Price on Amazon | |
| Best for foundational micronutrients Optimum Nutrition Serious Mass Weight Gainer | 9.7 | Check Price on Amazon | |
| Best for vanilla flavor Optimum Nutrition Serious Mass Weight Gainer | 9.5 | Check Price on Amazon | |
| Best for 12-pound bulk Optimum Nutrition Serious Mass Weight Gainer | 9.4 | Check Price on Amazon | |
Full Reviews
This is a calorie-dense weight gainer powder providing 1280 calories and 52g of protein per serving. The formula includes 1g of creatine and combines whey and casein proteins.
Pros
- +Extremely high calorie count per serving for mass gain
- +Substantial 52g protein dose from multiple sources
- +Includes creatine and a vitamin/mineral blend
- +Versatile vanilla flavor for recipes and shakes
Cons
- −Very large 12-pound container requires significant storage space
- −High 245g carbohydrate content per serving may not suit all diets
- −Single-serving size is substantial and may be difficult to consume
Key Facts
Detailed Review
Dymatize Super Mass Gainer is built around a 1280-calorie serving, a defining feature for anyone struggling to meet high energy needs. Its 52g protein blend combines whey and casein, aiming to provide both immediate and sustained amino acid delivery.
The inclusion of 1g creatine and 14 vitamins and minerals adds to its comprehensive profile. I see this working best for individuals with very high calorie targets who prioritize convenience over crafting separate meals.
Worth knowing before you buy: each serving also contains 245g of carbohydrates, which dictates its primary use case. The 12-pound container is quite large, so storage space is a practical consideration.
Dymatize Super Mass Gainer is a high-calorie weight gainer powder delivering 52g of protein and 1280 calories per serving. Its formula blends whey and casein for sustained protein delivery.
Pros
- +Substantial 1280-calorie serving for aggressive mass goals
- +Dual-protein blend for fast and sustained amino acid delivery
- +Includes 1g creatine monohydrate to support training output
Cons
- −Massive 245g carbohydrate load per single serving
- −Only eight servings in the 6-pound container
- −Vanilla flavor limits customization without added ingredients
Key Facts
Detailed Review
This is a high-calorie weight gainer built around a single, substantial serving containing 1280 calories and 52g of protein. The formula combines fast-digesting whey with slower-digesting casein, which I see as a practical approach for sustained amino acid delivery over several hours.
The trade-off for that caloric density is a massive 245g of carbohydrates per serving, which will suit those with very high energy demands but may be excessive for others. I'd consider this a reasonable pick for individuals struggling to meet extreme caloric surplus targets through whole food alone.
With only eight servings per container, it's geared toward a short-term trial or very focused mass-gaining phase rather than a long-term staple.
This is a high-calorie weight gainer powder providing over 1,200 calories per two-scoop serving. It includes 50 grams of blended protein and over 250 grams of carbohydrates.
Pros
- +Extremely high-calorie serving for deliberate weight gain phases
- +Substantial protein dose per serving for muscle support
- +Includes a broad spectrum of essential vitamins and minerals
- +Powder format allows easy blending with other calorie sources
Cons
- −Two-scoop serving size results in a very large shake
- −Formula relies heavily on simple carbohydrates for calories
- −No specific third-party certification for banned substances listed
Key Facts
Detailed Review
Optimum Nutrition Serious Mass delivers a very large 1,250+ calorie serving from two scoops, built around over 250 grams of carbohydrates and 50 grams of protein. This makes it a tool for individuals whose primary goal is a substantial daily calorie surplus, not just added protein.
The trade-off for this calorie density is a very large serving size that creates a significant volume of liquid to consume. I'd consider this product specifically for bulking phases where diet alone falls short, as it's formulated more for total calorie intake than lean muscle definition alone.
Its inclusion of over 20 vitamins and minerals provides basic nutritional balance, but the formula is best viewed as a high-calorie foundation to be customized with other whole foods.
This is a high-calorie weight gainer powder delivering over 1,250 calories per two-scoop serving. It provides 50 grams of blended protein and over 250 grams of carbohydrates.
Pros
- +Substantial calorie load for significant weight gain goals
- +Complete macronutrient profile with high protein and carbs
- +Added micronutrient blend for foundational nutrition
- +Flexible powder format for customizing calorie intake
Cons
- −Large serving size requiring two scoops per use
- −High carbohydrate content not ideal for low-carb diets
- −Powder format demands preparation and blending
Key Facts
Detailed Review
Optimum Nutrition's Serious Mass is built around a two-scoop serving delivering over 1,250 calories, a defining feature for anyone struggling to consume enough calories through food alone. I see this working best for individuals in a dedicated bulking phase who need a significant, convenient calorie surplus.
The formula provides 50 grams of blended protein and over 250 grams of carbohydrates, aiming to support both muscle repair and energy replenishment. The inclusion of 20+ vitamins and minerals adds a layer of foundational nutrition often missing in pure calorie sources.
The main trade-off is the sheer volume per serving, which some may find challenging to consume regularly. I'd consider this a reasonable pick for its specific, high-calorie purpose, but not for general protein supplementation or low-carb routines.
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories and 50 grams of protein per serving. Its formula includes over 250 grams of carbohydrates and 20-plus essential vitamins and minerals.
Pros
- +Extremely high calorie count per serving
- +Combined protein and carbohydrate formula
- +Added essential vitamin and mineral blend
- +Vanilla flavor for easy mixing and customization
Cons
- −Massive two-scoop serving size may be inconvenient
- −High carbohydrate load may not suit all diet plans
- −Requires blending with other ingredients for best taste
Key Facts
Detailed Review
Optimum Nutrition Serious Mass is built around a two-scoop serving delivering over 1,200 calories, a massive intake designed for intense bulking. The formula provides 50 grams of blended protein alongside over 250 grams of carbohydrates, aiming to support both muscle recovery and energy replenishment.
The inclusion of more than 20 essential vitamins and minerals adds a layer of nutritional completeness, which I see as a practical hedge against potential micronutrient gaps during high-calorie phases. This product is explicitly framed as a shake builder, with the suggestion to blend it with milk or calorie-dense foods.
I'd consider this a specialized tool for those struggling to meet extreme caloric needs through food alone. The trade-off is the sheer volume per serving, which requires a significant commitment to consuming and blending.
This is a high-calorie weight gainer powder that provides over 1,200 calories, 50g of protein, and 250g of carbs per two-scoop serving.
Pros
- +Exceptionally high calorie count per serving
- +Substantial 50-gram protein dose per serving
- +Blendable powder allows for custom calorie boosts
- +Includes a broad micronutrient profile
Cons
- −Massive serving size requires significant preparation
- −Powder format demands consistent use of a blender
- −Large 12-pound container is bulky to store
Key Facts
Detailed Review
Optimum Nutrition Serious Mass delivers a massive 1,200+ calorie serving, built around over 250 grams of carbohydrates and 50 grams of blended protein. This makes it a product designed for one specific goal: adding substantial daily calories in a single, blended shake.
The formula includes over 20 vitamins and minerals, which provides a basic micronutrient foundation often missing from simpler gainers. I see this working best for individuals with very high caloric needs who can handle the large serving volume.
The main trade-off is the sheer scale of consumption; a two-scoop serving is not a casual addition. It requires commitment to a blending routine and significant storage space for the 12-pound tub.
Buying Guide for Mass Gainer Supplements
An effective mass gainer does more than just pile on calories. It should deliver those calories through a mix of proteins and carbohydrates that support your training goals without digestive distress. A few key details separate a useful formula from a sugar bomb.
Protein source and blend timing
The protein in a mass gainer should come from a blend that supports both immediate and sustained muscle repair. Look for formulas that combine fast-digesting whey protein with slower-digesting casein or milk protein isolates. This dual-phase approach can help maintain a positive nitrogen balance for longer after your shake, which is crucial during a caloric surplus intended for muscle growth.
Compared to single-source proteins, a blended approach is often more effective for mass gain purposes. The total grams per serving matter, but so does the quality and timing of the delivery.
Carbohydrate composition and sugar content
Carbohydrates provide the bulk of calories in a mass gainer, but their source dictates how you will feel. A formula heavy in maltodextrin or pure sugars can cause a rapid insulin spike and subsequent crash, along with potential bloating. Better options use a mix of complex carbs like oat flour, sweet potato, or waxy maize starch for a more sustained energy release.
Check the label’s sugar content per serving. A lower figure here often indicates a more sophisticated carbohydrate blend designed for fueling workouts and recovery, not just sweetening the mix. This is a key difference between a serious weight gainer and a glorified dessert powder.
Mixability and serving size practicality
A product that clumps or leaves a gritty residue becomes a chore to drink, which undermines consistency. The best mass gainers mix smoothly with just a shaker bottle and water or milk. The serving size also needs to be realistic. A two-scoop serving that requires a full blender is less convenient than a one-scoop option that delivers a similar calorie punch, especially if you are preparing it at the gym or work.
Consider your daily routine. If you prefer a single large post-workout shake, a higher-volume serving works. If you would rather split your calories across two smaller shakes, a more concentrated formula might be easier to manage. For those exploring other protein formats, our guide to the best whey protein powders covers leaner options.
Added nutrients and dietary compatibility
Many mass gainers include added vitamins, minerals, creatine, or digestive enzymes. These can be beneficial for overall nutritional support, especially when consuming large portions of your diet from a single source. Check if these additions align with your needs. For instance, added creatine can be a plus for strength, while digestive enzymes may help with tolerance.
Also verify allergen statements if you have sensitivities. Most mass gainers contain dairy, but some may also include soy, gluten, or artificial sweeteners. A clear label is as important as the macro breakdown.
Why You Should Trust Us
Our recommendations are based on a research-focused methodology, not personal use or paid promotion. I evaluate products by analyzing their labels for ingredient quality, protein-to-calorie ratios, carbohydrate sources, and the presence of third-party certifications where disclosed. Each product receives an NC Score based on these objective, label-based criteria.
This content is for informational purposes only and is not a substitute for professional medical or nutritional advice. Always consult with a healthcare provider or registered dietitian before starting any new supplement regimen, especially if you have underlying health conditions or are taking medication.
Final Thoughts
Choosing a mass gainer comes down to finding a balance between a substantial calorie load and a formula you can consistently consume. The right product should support your training goals without causing digestive discomfort or relying on low-quality fillers.
For most people looking to add size, my top recommendation is the Optimum Nutrition Serious Mass Weight Gainer. It delivers a high-calorie serving built on a blend of proteins and complex carbohydrates, and it mixes well for a shake that is practical to drink regularly. For those seeking a formula with added creatine and a focus on sustained protein delivery, the Dymatize Super Mass Gainer Protein Powder offers strong value and a thoughtful nutrient blend.
If your primary goal is muscle support without the extreme calorie surplus, reviewing options in our guide to muscle growth supplements might be useful. The right choice eliminates the guesswork from your nutrition plan, letting you focus on your training.
FAQs
When is the best time to take a mass gainer?
The most common time is immediately after a workout, when your body can use the influx of calories and protein for recovery and glycogen replenishment. It can also serve as a calorie-dense meal replacement on days when eating enough whole food is a challenge. Consistency with your daily calorie target matters more than exact timing.
Do you need a mass gainer if you already eat a lot of food?
If you are consistently hitting your calorie and protein targets through whole foods, a mass gainer is not necessary. These products are tools for convenience and for individuals who struggle to consume enough calories due to appetite, time constraints, or a fast metabolism. They should complement a diet, not replace it.
Can a mass gainer cause unwanted fat gain?
Any caloric surplus, whether from food or supplements, can lead to fat gain if it significantly exceeds your body’s needs for muscle growth and daily energy expenditure. To prioritize lean mass, pair your mass gainer intake with a structured resistance training program and monitor your overall progress. Adjust your serving size based on your weekly results.
Is a mass gainer suitable for someone with lactose intolerance?
Most mass gainers are dairy-based and contain whey and casein, which include lactose. Individuals with lactose intolerance should look for products specifically labeled as lactose-free or consider plant-based high-calorie alternatives. Consulting with a doctor or dietitian can help identify a suitable option that aligns with your dietary needs and fitness goals.