Rule 1 Mass Gainer is a high-calorie performance weight gainer engineered specifically for hardgainers, high-output athletes, and active Kiwis who struggle to build size through whole food alone. Packing an immense 1,220 calories, 40g of multi-source protein, and over 250g of complex carbohydrates per serving, this powerful formula drives positive nitrogen balance and rapid glycogen replenishment. Designed to help you smash calorie deficits and support serious muscle growth, Rule 1 Mass Gainer provides the heavy-duty fuel required to transform your physical size and strength.

Key Benefits & Features

• Massive Caloric Payload: Delivers over 1,200 nutrient-dense calories per serving to support rapid weight gain and muscle hypertrophy.

• 40g Multi-Stage Protein Blend: Features Whey Concentrate, Whey Isolate, and Hydrolysed Whey to continuously feed muscle repair and growth.

• Complex Carbohydrate Matrix: Loaded with over 250g of dual-source carbohydrates to replenish depleted muscle glycogen and power heavy training.

• Rich in Naturally Occurring BCAAs: Delivers essential Branched-Chain Amino Acids, including over 9g of Leucine, to trigger muscle protein synthesis.

• Clean & Transparent Formula: Formulated without unnecessary creamers, spiked aminos, or inferior fillers to ensure quality weight gain.

How It Works

Achieving true physical scale requires a sustained caloric surplus, which can be difficult to hit through solid meals alone. Rule 1 Mass Gainer overcomes this barrier by delivering a concentrated ratio of complex carbohydrates to high-grade proteins. The rapid absorption of whey isolates paired with whey concentrates delivers a rapid surge of essential amino acids straight to damaged muscle tissues, accelerating structural recovery after intense workouts.

Simultaneously, the extensive carbohydrate complex refills glycogen reserves in active muscle tissue, preventing the body from breaking down existing muscle mass for energy. By delivering a balanced mix of macro-nutrients and key electrolytes, Rule 1 Mass Gainer ensures your body stays in a constant anabolic state, maximizing weight gain while minimizing digestive distress.

Recommended Use

Mix 2 full scoops (approx. 335g) with 500–600ml of cold water, whole milk, or your preferred milk alternative in a Sprint Fit shaker. Consume immediately post-workout to jumpstart muscle recovery. On non-training days, consume one serving between main meals or split into two half-servings throughout the day to hit your total daily caloric targets.

Container Size: 6lb 
Serving Size:  2 heaping scoops (325g) 
Servings Per Container: 16

Please Note: Nutritional Information is to be used as a guide only, actual values may differ between flavours and sizes and when formulations are modified or updated by the manufacturer. 
Contact us if you have any questions regarding this products ingredients.

We use NZ Couriers as our courier service using an international service. NZ Couriers provides our customers with fast and reliable delivery to destinations across their comprehensive AUS network. 

Standard orders over $60.00 receive free* shipping nationwide, excluding WA, NT, TAS.
Standard delivery starts from $12.90 per shipment for orders under $60.00 
Signature Required $14.90 per shipment. Please ensure you do not have the 'authority to leave' authorization set up at your address with NZ Couriers should you wish to use this service.
If you don't want NZ Couriers to leave your parcel unattended, please select the signature required option. This is especially recommended for high value orders. Neither NZ Couriers nor Sprint Fit are liable for parcels that are stolen, damaged or lost after an item has been delivered.

Final pick up each day is at 3.45pm Monday to Friday. 

*Excludes public holidays and weekends as courier is closed

Click here to view the full Shipping Details and Returns Policy.