Rule 1·Weight Gain
R1 Mass Gainer
Try a new flavour, worry-free. If you don't love it, we'll swap it for another flavour or give you store credit.
30 days, up to 5 serves. Full terms
A HIGH-CALORIE MASS GAINER FORMULATED TO SUPPORT MUSCLE SIZE, RECOVERY, AND STRENGTH
- Over 1,220 calories with 250g+ carbs and 40g protein per serve
- 6:1 carb-to-protein ratio ideal for rapid weight and muscle gain
- Includes creatine, MCTs, and glutamine to support energy and recovery
- 9g naturally occurring BCAAs and Informed Choice® certified
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R1 Mass Gainer
Product details
On this page
R1 Mass Gainer by Rule One Proteins is a high-calorie supplement formulated for individuals aiming to increase muscle mass and size. Each serving delivers over 1,220 calories, combining more than 250 grams of carbohydrates with 40 grams of protein sourced from a blend of whey concentrate, isolate, and hydrolysate. This 6:1 carbohydrate-to-protein ratio is designed to support rapid weight gain and muscle recovery.
The formula is enhanced with creatine, medium-chain triglycerides (MCTs), and glutamine to further support muscle growth and energy levels. Additionally, it provides 9 grams of naturally occurring branched-chain amino acids (BCAAs) per serving. R1 Mass Gainer is free from creamers, soy protein, and banned substances, and it is Informed Choice® Certified, ensuring it has been tested for prohibited substances by a world-class sports anti-doping lab.
How to use
R1 Mass Gainer should be combined with a high-calorie diet and weight training or other high-intensity exercise. Use R1 Mass Gainer in conjunction with the food you normally eat for additional daily calories. Do not use R1 Mass Gainer in place of meals.
Mixing Directions
Add two (2) heaping scoops of Mass Gainer with 20-24 oz. of water, or milk, in a shaker cup or blender and mix it up!
Alternate Suggested
Mix in a blender, add your favorite fruit, a tablespoon of peanut or tree nut butter, and ice to the above, mix, and enjoy a protein-fortified smoothie! Calorie-Dense Suggested Mix In a blender, add one (1) serving of R1 Mass Gainer, 20-24 oz. of whole milk, and two (2) scoops of ice cream. Blend and enjoy a protein-fortified shake!
Warnings
Please ensure that this product is kept out of reach of children and not used if the seal is broken. After use, replace the lid promptly and avoid using a wet spoon or scoop. Store in a cool and dry place below 30 degrees Celsius, away from heat or moisture, and keep out of direct sunlight.
Please note that this is a formulated supplementary sports food and is not suitable for children under the age of 15, pregnant or nursing women, and should only be used under medical or dietetic supervision. Prior to consuming this product, please consult with a licensed healthcare professional. This should not be the sole source of nutrition and should be consumed in combination with a nutritious diet and/or a suitable physical training or exercise program. Do not exceed the recommended daily serving size and discontinue use immediately if any adverse effects are experienced.
R1 Mass Gainer is covered · Love the Taste Guarantee
Love the taste. Or swap it.
Try up to 5 serves of R1 Mass Gainer within 30 days. If you don't love the flavour, bring it back and we'll swap it for another flavour, or give you store credit.
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