Experience the pinnacle of protein purity with Optimum Nutrition Gold Standard 100% Isolate, engineered specifically for dedicated athletes and lifters who demand maximum results without unnecessary calories. Each serving delivers 25 grams of ultra-filtered, rapidly absorbing whey protein isolate with no more than 1 gram of carbohydrates and less than 1 gram of fat. By stripping away excess lipids, cholesterol, and sugars, ON Gold Standard 100% Isolate provides an ultra-clean fuel source designed to accelerate lean muscle synthesis, optimize post-workout recovery, and easily fit into strict dietary macro targets.

Key Benefits & Features

• 25g Pure Whey Isolate per Serve: Delivers a high-yield dose of premium protein to fuel lean muscle growth and accelerate tissue repair.

• Hydrolysed & Ultra-Filtered Blend: Partially broken down into smaller amino acid chains for rapid absorption and easy digestion.

• 5.5g Naturally Occurring BCAAs: Packed with essential branched-chain amino acids to kickstart muscle protein synthesis and reduce post-exercise soreness.

• Ultra-Low Fat & Carbohydrate Profile: Contains no more than 1g of carbs and less than 1g of fat per scoop, perfect for lean conditioning and body recomposition.

• Informed-Choice Certified: Rigorously tested for banned substances, giving competitive Kiwi athletes total confidence in every batch.

How It Works

Optimum Nutrition Gold Standard 100% Isolate is crafted starting with high-grade whey protein that undergoes advanced cross-flow microfiltration to isolate pure protein away from fat, lactose, and impurities. A portion of this isolated protein is then hydrolysed—enzymatically broken down into smaller peptide chains. This ultra-refined structure allows your digestive system to process and transport essential amino acids into starved muscle fibres at an accelerated rate compared to standard whey concentrates.

Because the majority of lactose and fat is removed during filtering, this premium isolate is incredibly gentle on the stomach and eliminates the heavy, bloated feeling often associated with lower-grade dairy proteins. Additionally, with 4.3g of naturally occurring glutamine and glutamic acid alongside 11.4g of essential amino acids (EAAs), it supplies the complete building blocks required to preserve lean tissue during intense training phases.

Recommended Use

Mix 1 rounded scoop (approx. 30g) with 200–250ml of cold water, low-fat milk, or your favourite beverage in a shaker cup. Shake thoroughly for 30 seconds until completely dissolved.

• Post-Workout: Consume within 30–60 minutes following intense physical training to accelerate muscle recovery and repair.

• Between Meals: Take 1 serving between main meals to maintain a consistent flow of amino acids and support your daily protein targets.

Container Size: 720G (1.58LB)
Serving Size:  1 Scoop 30G
Servings Per Container: 24

Container Size: 1.36 KG (3LB)
Serving Size:  1 Scoop 30G
Servings Per Container: 44

Container Size: 2.28KG (5.02LB)
Serving Size:  1 Scoop 30G
Servings Per Container: 76

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.