Take your vascularity, training endurance, and muscle pumps to the next level with USN Pure L-Arginine. Formulated specifically for hard-training athletes, bodybuilders, and fitness enthusiasts, this unflavoured, pure amino acid powder acts as a direct precursor to nitric oxide production in the body. By helping dilate blood vessels and enhance blood flow directly to working muscle tissue, it ensures maximal nutrient uptake, powerful muscle fullness, and elevated workout performance with zero unnecessary fillers or stimulants.

Key Benefits & Features

• Nitric Oxide Precursor: Promotes vasodilation to improve blood flow, vascularity, and intense muscle pumps during heavy resistance training.

• Enhanced Nutrient Delivery: Supports rapid transport of oxygen, amino acids, and vital nutrients directly into working and recovering muscles.

• 100% Pure & Unflavoured: Delivers pure, pharmaceutical-grade L-Arginine with no added sugar, artificial colours, flavours, or proprietary blends.

• Stimulant-Free Versatility: Provides clean performance and pump support without caffeine, making it ideal for late-night training or stacking with high-stim pre-workouts.

• Effortless Mixability: Micronised powder dissolves cleanly into water, juice, intra-workout aminos, or your favourite pre-workout beverage.

How It Works

L-Arginine is a conditionally essential amino acid that plays an indispensable role in the synthesis of nitric oxide (NO) via the endothelial nitric oxide synthase pathway. Once ingested, it signals the smooth muscles surrounding your vascular walls to relax, widening the blood vessels. This vasodilation reduces circulatory resistance, allowing a surging volume of oxygen- and nutrient-rich blood to reach fatigued muscle groups during strenuous exercise.

Beyond driving skin-splitting pumps, enhanced blood circulation accelerates the clearance of metabolic waste products like lactic acid, helping offset muscular fatigue and prolong workout endurance. Additionally, L-Arginine participates in the body's natural creatine synthesis and nitrogen retention, making it an essential foundational amino acid for lean muscle development and tissue repair.

Recommended Use

Mix 1 level scoop (approx. 5g) with 200–300ml of cold water, fruit juice, or your preferred pre-workout drink.

• Pre-Workout: Consume 1 serving 30 minutes prior to training to maximise vascular blood flow and muscle pumps.

• Non-Training Days: Consume 1 serving upon waking or between meals to maintain steady nitric oxide levels and cardiovascular support.

Container Size: 300G
Serving Size: Half scoop (3g)
Servings Per Container: 100

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

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