If you’re a hard gainer trying to add size, mass gainers can help boost daily calories and protein intake. This guide highlights five high-quality weight gainers that are well-suited for skinny guys, featuring calorie-dense blends, complete protein profiles, and carb sources that support recovery. Each option emphasizes scientifically supported ingredients and practical serving sizes to support steady weight gain when paired with a structured training plan.
| Product | Brand | Approx Calories per Serving | Protein per Serving | Carbs per Serving | Notes |
|---|---|---|---|---|---|
| GNC AMP Mass XXX | GNC | 780 | 50g | Carbs included with protein | Clinically backed mass gainer with MyoTOR and creatine |
| Rival Nutrition Clean Gainer (Chocolate Fudge) | RIVAL NUTRITION | 580 | 30g | 101g | Clean calories, complete protein blend |
| NAKED Vegan Mass | NAKED | 1,230 | 50g | 248g | Three ingredients, plant-based |
| NAKED Mass | NAKED | 1,250 | 50g | 252g | Three ingredients, multi-phase protein |
| Optimum Nutrition Serious Mass | Optimum Nutrition | 1,250 | ~50g+ | High calories per serving | Trusted mass gainer with immune-support nutrients |
Note: These products are high-calorie supplements intended to support weight gain alongside resistance training. Always follow label directions and consider consulting a healthcare professional if you have dietary restrictions or health conditions.
GNC Amp Mass XXX Weight Gainer
GNC AMP Mass XXX is a clinically backed weight gainer designed to help increase muscle mass and strength. Each serving delivers 50g of protein, with a blend that includes MyoTOR, creatine, and BETAPOWER to support training adaptations. It emphasizes improved results with fewer sets, while offering calories and macro balance to fuel workouts and recovery. Suitable for athletes seeking a measurable uptick in size within a structured training program.
Rival Nutrition Clean Gainer Chocolate Fudge
Rival Nutrition Clean Gainer provides 580 clean calories and 30g of high-quality protein per serving, with 101g of multi-source carbs. The protein blend uses whey concentrate, whey isolate, and casein to support muscle growth, recovery, and amino acid availability. This option appeals to those who want a straightforward mass gainer without artificial ingredients, and it doubles as a reliable daily caloric boost for hard gainers pursuing lean mass.
NAKED Vegan Mass
NAKED Vegan Mass is built on just three ingredients—pea protein, organic rice protein, and organic maltodextrin from tapioca—delivering 50g of protein and 1,230 calories per serving. It is non-GMO, soy-free, gluten-free, dairy-free, and free from artificial sweeteners or colors. The product favors a vegan, clean approach to mass gain, combining fast and slow-digesting proteins for a steady amino supply during weight gain phases.
NAKED Mass
NAKED Mass combines Naked Whey, Naked Casein, and organic maltodextrin to deliver 50g protein and 1,250 calories per serving. It emphasizes a multi-phase protein approach, ensuring fast protein synthesis as well as sustained amino availability. With 5g sugar per serving and no artificial ingredients, it offers a balanced option for those seeking substantial gains without artificial additives.
Optimum Nutrition Serious Mass
Optimum Nutrition Serious Mass is a longtime staple in mass-gainer categories, offering high calories per two-scoop serving—around 1,250 calories. It combines carbohydrate-heavy formulas with a solid protein component to support weight gain and recovery. The product note suggests possible changes in packaging, but the formulation remains focused on providing energy-dense mass gains for those pursuing weight gain through consistent training and calorie surplus.
Rival Nutrition Clean Gainer Cookies and Cream
Rival Nutrition Clean Gainer Cookies and Cream provides a clean option with 560 calories and 30g of protein per serving. It uses a full-spectrum protein blend (whey concentrate, whey isolate, and casein) to support muscle growth, strength, and recovery, with 99g of multi-source carbs. The flavor is naturally flavored and free from artificial ingredients, making it a practical choice for daily mass gainer use while maintaining a lean mass focus.
Buying Guide: Key Purchase Considerations For Mass Gainers
- Calorie and protein balance: Look for products that offer a high calorie count per serving along with at least 25-30g of protein to support muscle synthesis. For very hard gainers, higher calories per serving can help you hit daily targets more easily.
- Carbohydrate source and fiber: Carbs fuel workouts and recovery. Prefer blends with complex carbs and some dietary fiber to support energy without spiking blood sugar excessively. Compare total carbs per serving and consider total calories.
- Ingredient quality: Favor products with recognizable protein sources (whey, casein, pea, etc.) and minimal artificial additives if you prefer a cleaner label. Plant-based gainers are options for vegans or those avoiding dairy.
- Amino acid profile: A complete array of essential amino acids, especially leucine, supports muscle protein synthesis. Some formulas include added EAAs or BCAAs for enhanced recovery.
- Digestibility and flavor: Some gainers mix better and taste more palatable than others. Consider lactose tolerance and any digestive sensitivities when choosing a flavor or formula.
- Allergen considerations: If you have dairy, gluten, soy, or other sensitivities, verify ingredient lists. Many gluten-free and dairy-free options are available.
- Usage strategy: Mass gainers are most effective when combined with resistance training and a structured eating plan. Use them as a snack, post-workout shake, or to meet daily calorie goals.
- Cycle and customization: Some athletes rotate between gainers to prevent palate fatigue and to manage overall macronutrient balance. Adjust serving sizes based on progress and guidance from a nutrition professional.
- Dosage and timing: Follow label directions on scoops per serving and frequency. Timing around workouts (pre- or post-workout) can influence intake and recovery.