Best Mass Gainers

High-calorie protein supplements for weight gain

10 products

Transparent Labs

Clean mass gainer with 53g protein, organic oats, and no artificial ingredients.

Naked Nutrition

Only 3 ingredients: whey, casein, and organic maltodextrin.

Legion Athletics

Clean mass gainer with grass-fed whey and slow-digesting carbs.

Optimum Nutrition

The best-selling mass gainer with 1,250 calories and 50g protein per serving.

Jacked Factory

Post-workout mass builder with creatine, betaine, and carbs.

Dymatize

1,280 calories with 52g protein and added creatine and glutamine.

BSN

Multi-source protein mass gainer with a premium flavor profile.

MuscleTech

Performance mass gainer with 80g multi-phase protein and 840 calories.

Nutricost

Budget mass gainer with 53g protein and 880 calories per serving.

MusclePharm

Informed Sport certified mass gainer with 50g protein and 1,270 calories.