Mass gainers are designed for hard gainers who struggle to eat enough calories from whole food. The best ones provide 50g+ protein, complex carbohydrates, and minimal added sugar per serving. Our top pick is NAKED Mass for its clean, three-ingredient formula with NSF certification.
How We Picked
We evaluated mass gainers on protein quality and quantity per serving, carbohydrate source (complex vs. sugar), calorie density, third-party testing, ingredient transparency, and value per serving. We prioritized products with whole-food carb sources and minimal added sugar over cheaper formulas loaded with maltodextrin and sugar.
A. NAKED Mass — Best Overall
NAKED Mass
Naked Nutrition
- 1,250 calories, 50g protein, 252g carbs per serving
- Only 3 ingredients: whey, casein, and organic maltodextrin
- NSF Certified — verified for purity and safety
- Only 5g sugar per serving — no added sugars
- 11.5g BCAAs naturally occurring per serving
Why we picked it: NAKED Mass proves you don't need 30 ingredients to make an effective mass gainer. Three ingredients — whey concentrate, micellar casein, and organic maltodextrin — deliver 1,250 calories with 50g of protein. The NSF certification verifies what's on the label is actually in the product. The minimal sugar content (5g) means the calories come from protein and complex carbs, not junk.
B. Optimum Nutrition Serious Mass — Best for Maximum Calories
Optimum Nutrition Serious Mass
Optimum Nutrition
- 1,250 calories and 50g protein per 2-scoop serving
- Over 250g of carbohydrates for glycogen loading
- 25 vitamins and minerals added for nutritional coverage
- Creatine monohydrate and glutamine included
- Available in Chocolate, Vanilla, and other flavors
Why we picked it: Serious Mass has been the category leader for years because it delivers exactly what hard gainers need — massive calories with decent protein in a product that actually tastes good. The added vitamins, minerals, and creatine make it more than just empty calories. At this price point and calorie density, it's the most practical way to add 1,000+ calories to your daily intake.
C. Dymatize Super Mass Gainer — Highest Protein
Dymatize Super Mass Gainer
Dymatize
- 1,280 calories and 52g protein per serving — highest protein count
- 10.7g BCAAs and 245g carbohydrates per serving
- 1g creatine monohydrate added
- Multiple flavors including Rich Chocolate and Gourmet Vanilla
- Vitamins and minerals complex included
Why we picked it: Dymatize Super Mass Gainer leads the category in protein content at 52g per serving, with 10.7g of BCAAs naturally occurring. For lifters who prioritize the protein-to-calorie ratio in their mass gainer, Dymatize delivers the most muscle-building protein per serving while still hitting the 1,200+ calorie mark needed for hard gainers.
Do You Actually Need a Mass Gainer?
Mass gainers exist for one specific audience: people who genuinely cannot eat enough whole food to gain weight. If you can eat 3,000+ calories from real meals, whole food is always the superior choice — it provides fiber, micronutrients, and phytochemicals that no powder can replicate. Mass gainers are a tool for the genuinely hard-gaining ectomorph, not a shortcut for lazy meal planning.
Before buying a mass gainer, try these calorie-boosting strategies: add olive oil or nut butter to meals (100–200 calories per tablespoon), drink calories through smoothies with oats, banana, and protein powder, eat more frequently (5–6 meals instead of 3), and choose calorie-dense foods like nuts, avocado, whole milk, and dried fruit. If these strategies still don't get you into a caloric surplus, a mass gainer fills the gap.
How to Use a Mass Gainer Without Getting Fat
The biggest mistake with mass gainers is using a full serving when you don't need 1,200+ calories in one shake. Start with a half serving (625 calories) and adjust based on your rate of weight gain. Aim for 0.5–1 lb per week — anything faster means you're adding more fat than necessary. Track your weight weekly and adjust your serving size accordingly.
Timing matters too. The best times for a mass gainer shake are post-workout (when your muscles are primed to absorb nutrients) and between meals when you have a long gap. Avoid taking a full serving right before bed unless you need the calories — the high carb content can disrupt sleep quality for some people.
Frequently Asked Questions
Are mass gainers just expensive carbs?
Cheaper mass gainers often are — they rely heavily on maltodextrin (a fast-digesting carb) with minimal protein. Quality mass gainers like NAKED Mass use a protein blend (whey + casein) as the primary ingredient and keep sugar low. Always check the protein-to-carb ratio and the sugar content. A good mass gainer should have at least 40g protein per serving with less than 10g sugar.
Can women use mass gainers?
Absolutely. Mass gainers aren't gender-specific — they're calorie-specific. Women who are trying to gain muscle, recover from being underweight, or fuel high-volume training programs can benefit from the extra calories. The key is adjusting the serving size. Most women will want a half or quarter serving (300–625 calories) rather than the full 1,200+ calorie dose designed for large male athletes.
Will mass gainers make me fat?
Mass gainers provide calories. Whether those calories build muscle or add fat depends on your training and total daily intake. If you're in a moderate caloric surplus (300–500 calories above maintenance) and training with progressive overload, the extra calories support muscle growth. If you're not training or eating far more than you need, yes — the excess will be stored as fat. The supplement doesn't decide; your activity level does.
Quick Comparison
| Product | Key Feature | Best For |
|---|---|---|
| NAKED Mass | 1,250 calories, 50g protein, 252g carbs per serving | Best Overall |
| Optimum Nutrition Serious Mass | 1,250 calories and 50g protein per 2-scoop serving | Best for Maximum Calories |
| Dymatize Super Mass Gainer | 1,280 calories and 52g protein per serving — highest protein count | Highest Protein |
Bottom Line: Which Should You Buy?
For most people: the NAKED Mass. 1,250 calories, 50g protein, 252g carbs per serving.
On a budget: the Optimum Nutrition Serious Mass. 1,250 calories and 50g protein per 2-scoop serving.
Premium pick: the Dymatize Super Mass Gainer. 1,280 calories and 52g protein per serving — highest protein count.
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