R1 Mass Gainer (12lb / 5.4kg)
High-Calorie Weight Gainer — Serious Nutrition for Serious Gains
What It Is
Size Accumulator
R1 Mass Gainer is built for athletes and hard gainers looking to pack on serious size and strength. Each serving delivers over 1,200 nutrient-dense calories, powered by a balanced combination of high-quality whey proteins, complex carbohydrates, and performance-boosting creatine. Perfect for fueling intense training and recovery.
What’s In It
Calories, Protein & More
Mass Gainer provides a premium blend of proteins and carbs designed for gradual, clean weight gain — not just empty calories. It fuels recovery, supports lean mass development, and helps maintain a steady supply of energy all day long.
Over 1,220 calories per serving†
40g of premium all-whey protein†
250g+ complex carbohydrate blend for sustained energy
1g Creatine Monohydrate for strength and size support†
9g naturally occurring BCAAs†^^
6:1 carb-to-protein ratio
Informed Choice® Certified – tested for banned substances
How To Use It
Anytime
Use R1 Mass Gainer between meals or after training to hit your daily calorie and protein goals. For best results, combine with a nutrient-dense diet and consistent resistance training.
Mixing Directions:
Basic: Mix 2 heaping scoops with 20–24 oz. of cold water, milk, or your favorite beverage. Blend or shake until smooth.
Smoothie: Blend with fruit, nut butter, and ice for a thicker shake.
Calorie-Packed Mix: For extreme gains, blend with whole milk and 2 scoops of ice cream for an ultra-high-calorie shake.