Packing on serious size requires a deliberate calorie surplus, and the easiest way to tip the energy balance is with a high-calorie shake that delivers dense macros in every glass. The difference between gaining and spinning your wheels often comes down to the specific calorie and protein numbers inside that tub, not just the label claims.
I’m Emma — the founder and writer behind Baby Bangs. I spend my days analyzing supplement labels, cross-referencing ingredient matrices, and sorting through hundreds of customer reports to find the mass gainers that actually deliver the calorie payload they advertise without packing unnecessary fillers.
Below I break down the top contenders that maximize calories per serving so you can fuel serious growth. Use this guide to zero in on the mass gainer with most calories for your specific bulk cycle.
How To Choose The Best Mass Gainer With Most Calories
Not all high-calorie tubs are built the same. Some pack their numbers with cheap sugar and low-quality protein concentrates, leaving you with more fat gain than lean mass. When you are hunting for the mass gainer with the most calories, keep these three factors in mind.
Check the Calorie-to-Protein Ratio
You want a calorie bomb that still carries meaningful protein. A solid benchmark is at least 45 to 55 grams of protein per 1000 calories. If the protein falls much lower, you are essentially buying a carb and fat drink, which works against muscle synthesis and tilts the surplus toward storage.
Examine the Carb Source
Simple sugars spike insulin fast but lead to energy crashes and unnecessary fat storage. Look for complex carbohydrates like waxy maize, oats, barley, or sweet potato flour. These digest slower, provide steady energy for workouts, and fill glycogen stores more efficiently over the long haul.
Look for Added Muscle-Building Boosters
Creatine, glutamine, and BCAAs are meaningful additions in a mass gainer. They reduce the need to buy separate supplements and enhance muscle recovery, power output, and nitrogen retention. A gainer with 1 to 5 grams of creatine per serving adds genuine anabolic value beyond the calorie count.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Dymatize Super Mass Gainer | Mid-Range | High calorie density with added creatine | 1,280 calories, 52g protein | Amazon |
| MHP UYM XXXL 1350 | Mid-Range | Extreme mass building & recovery | 1,350 calories, 50g protein | Amazon |
| Ronnie Coleman King Mass XL | Mid-Range | King-sized carbs for heavy bulk cycles | 1,000+ calories, 180g carbs | Amazon |
| MuscleMeds CARNIVOR Mass | Mid-Range | Lactose-free beef protein isolate | 700 calories, 50g beef isolate | Amazon |
| NutraBio Extreme Mass | Premium | Clean, transparent label mass gainer | Clean macros, 53g protein | Amazon |
| GNC AMP Mass XXX | Premium | Clinically proven strength & stamina | 780 calories, 50g protein, MyoTOR | Amazon |
| Mutant Mass | Premium | Whole food carb blend & gourmet taste | 1,100 calories, 56g protein | Amazon |
In‑Depth Reviews
1. Dymatize Super Mass Gainer
Dymatize Super Mass Gainer fires off 1,280 calories and 52 grams of protein per serving, placing it at the top of the calorie-density chart for mid-range budget. The protein blend combines whey, isolate, and casein for a staggered digestion timeline that feeds muscles for hours after your shake. It also packs 1 gram of creatine and 10.7 grams of BCAAs per scoop, reducing the need for additional supplements during a bulk.
The carbohydrate profile weighs in at 245 grams per serving, which is substantial enough to replenish glycogen after heavy sessions. The Gourmet Vanilla flavor mixes cleanly with water or milk, and the powder dissolves without excessive clumping when shaken for 20 seconds. This is a reliable workhorse for lifters who want a straightforward calorie surplus without exotic ingredients or inflated price tags.
Customers note the high carb load makes it best suited for workout days or morning shakes when your body can better utilize the energy. On rest days, you may want to reduce the serving size to avoid overshooting maintenance calories. The 8-serving bag entry point is convenient for first-time buyers who want to test the blend before committing to a larger tub.
Why it’s great
- Highest calorie count in this tier at 1,280 per serving
- Includes creatine for strength support
- Fast and slow protein blend for extended amino delivery
Good to know
- Carbs are high for rest-day usage
- 8-serving bag runs out quickly if used daily
2. MHP UYM XXXL 1350
MHP UYM XXXL 1350 edges past the competition with 1,350 calories per serving, making it the absolute calorie king among the mid-range options. The formula delivers 50 grams of protein alongside 11 grams of BCAAs and added leucine, which directly triggers muscle protein synthesis. For lifters who struggle to eat enough solid food, this powder slams the energy gap in one shake.
The French Vanilla Creme flavor is notably sweet but not cloying, and the mixability holds up in a standard shaker bottle. The carb matrix is designed for sustained energy rather than a sugar crash, using a blend of maltodextrin and other complex carbs. This makes it a viable choice for both pre-workout fueling and post-training recovery.
Some users report the thick texture requires a bit more liquid than the label suggests to reach a drinkable consistency. The 8-serving size is ideal for assessing tolerance before buying a larger container. If your priority is squeezing the highest calorie count into a single scoop, this formula delivers on that promise.
Why it’s great
- Highest calorie density on this list at 1,350 per serving
- Generous 11g BCAAs and leucine for synthesis
- Complex carb blend provides steady fuel
Good to know
- Thick texture requires extra water to mix
- Limited to 8 servings per container
3. Ronnie Coleman King Mass XL
Ronnie Coleman King Mass XL delivers a massive 180 grams of carbohydrates and 60 grams of protein per serving, totaling over 1,000 calories. The carb-to-protein ratio leans heavily toward carbs, making this an exceptional choice for athletes with high glycogen turnover or those in the middle of an aggressive bulking phase. The chocolate milkshake flavor is notably rich and mixes thick enough to feel like a genuine treat.
Beyond the macros, each scoop includes creatine and glutamine, both of which support strength output and recovery. The 6-pound bag provides 108 scoops, giving you extended value for the price tag. The formula is produced in cGMP and NSF-registered facilities, so you get a quality guarantee that matches Ronnie Coleman’s training philosophy.
Customers who have a sweet tooth tend to rate the flavor as the best among mass gainers in this tier. The biggest consideration is the sheer carb volume — at 180 grams per serving, this is best reserved for hard-training days unless your metabolism runs extremely fast. Beginners should start with half a serving to gauge tolerance.
Why it’s great
- 60g protein per serving for solid amino delivery
- 180g carbs replenishes glycogen rapidly
- 108 scoops per 6lb bag for long-lasting use
Good to know
- Very high carb load may not suit rest days
- Thick chocolate flavor can feel heavy
4. MuscleMeds CARNIVOR Mass
MuscleMeds CARNIVOR Mass is the only entry on this list using 100% beef protein isolate, making it completely lactose-free and dairy-free. Each serving provides 700 calories, 50 grams of beef isolate protein, and 125 grams of carbohydrates with zero fat and zero sugar. The protein source is 350% more concentrated in amino acids than steak, per the brand, and it lacks the gelatin and collagen that often dilute other animal-based powders.
The Vanilla Caramel flavor is mild and not overly sweet, which helps if you are sensitive to the artificial flavors found in many gainers. The carb matrix relies on a clean source that keeps blood sugar relatively stable compared to sugar-laden competitors. For anyone with dairy intolerance who still wants a high-calorie mass gainer, this is a stand-out option.
Beef protein isolate has a slightly thinner mouthfeel than whey-based gainers, so the shake goes down easier if you struggle with thick textures. The 5-pound tub provides a solid number of servings for the mid-range price point. Keep in mind the calorie count is lower than the heavy hitters, so you may need to double the serving to match the 1,000+ calorie range.
Why it’s great
- 100% beef protein isolate — no dairy, no lactose
- Zero fat and zero sugar per serving
- Mild flavor and thin texture for easy mixing
Good to know
- Only 700 calories vs competitors near 1,000+
- Beef isolate may not appeal to everyone taste-wise
5. NutraBio Extreme Mass
NutraBio Extreme Mass takes a clean approach to mass gainers, delivering 53 grams of protein from a WPC80 and micellar casein blend with only 6 grams of fat per serving. The carb count sits at 99 grams — lower than the carb-heavy competitors — which makes this a strong choice for lifters who want a calorie surplus without an extreme glycemic load. The formula is gluten-free, soy-free, vegetarian, and third-party tested for purity.
What sets NutraBio apart is its fully transparent label with no proprietary blends. You see every ingredient and its exact dosage. The powder is produced in a cGMP facility in the USA and holds kosher and halal certifications. For buyers who prioritize ingredient integrity and want to avoid hidden fillers, this label transparency is a major selling point.
The Vanilla flavor is subtle and mixes well without excessive foam. Because the calorie count per serving is lower than the carb-heavy gainers, you may need a larger scoop or a double serving to reach 1,000+ calories. Consider this option if your main priority is clean ingredients over maximum calorie density.
Why it’s great
- Fully transparent label with no proprietary blends
- Gluten-free, soy-free, kosher, halal certified
- Low fat content at 6g per serving
Good to know
- 99g carbs is lower than many mass gainers
- Requires larger serving to hit 1,000 calories
6. GNC AMP Mass XXX
GNC AMP Mass XXX stands out for its clinically tested ingredient stack, including MyoTOR and BETAPOWER alongside 50 grams of protein and 780 calories per serving. The MyoTOR compound is clinically shown to improve strength in as little as two weeks and helps you get results with 40% fewer sets. This is a mass gainer engineered not just for calorie surplus, but for performance enhancement in the gym.
Each serving includes micronized amino acids, creatine, and betaine — the latter supports endurance and power output during resistance training. The entire product is banned-substance tested against 220+ substances on the WADA list, which matters for competitive athletes who need third-party verification. The Vanilla flavor mixes smoothly and does not leave a gritty residue.
At 780 calories, the energy density is lower than the extreme 1,000+ calorie options, so you may need two servings to match the heavier gainers. The focus here is on quality ingredients and clinically supported ergogenic aids rather than raw calorie quantity. Choose this if your goal is strength improvement alongside mass gain.
Why it’s great
- Clinically proven MyoTOR for strength gains
- Banned substance tested for athletes
- Includes creatine, betaine, and micronized aminos
Good to know
- Only 780 calories — lower than carb-heavy options
- Premium tier comes at a higher cost per serving
7. Mutant Mass
Mutant Mass delivers 1,100 calories and 56 grams of protein per serving from a whey isolate, concentrate, and casein blend. What sets it apart from the rest of the field is its whole-food carbohydrate base — barley, rolled oats, sweet potato, avocado, coconut oil, flaxseed, pumpkin seed, and sunflower oil. This natural carb matrix provides steady energy without the blood sugar rollercoaster that comes from simple sugars.
The protein blend covers fast, medium, and slow digestion windows, ensuring amino acids are available for hours after consumption. The 15-pound bag provides 49 servings, making it one of the highest-volume purchases in this tier. The Chocolate Fudge Brownie flavor has a gourmet reputation among users who regularly consume mass gainers.
Because the carb profile uses real whole-food sources, the texture is slightly thicker than gainers based on maltodextrin alone. Some users find they need extra water to reach their preferred consistency. If you want a calorie-dense gainer that mimics a whole-food meal replacement, this is the best option in the premium group.
Why it’s great
- Whole food carb blend for sustained energy
- 56g protein from isolate, concentrate, and casein
- 49 servings per 15lb bag for exceptional value
Good to know
- Thick texture may require extra liquid
- Premium price per tub despite high serving count
FAQ
Can I use a mass gainer if I am lactose intolerant?
How many calories should a mass gainer have per serving to be effective for bulking?
Is creatine in a mass gainer enough or do I still need a separate creatine supplement?
Final Thoughts: The Verdict
For most users, the mass gainer with most calories winner is the Dymatize Super Mass Gainer because it combines 1,280 calories, 52 grams of protein, and added creatine at a mid-range investment level. If you want the absolute highest calorie density per scoop, grab the MHP UYM XXXL 1350. And for a whole-food carb blend with gourmet taste, nothing beats the Mutant Mass.