Optimum Nutrition Gold Standard 100% Casein is a slow-digesting casein protein powder designed for people in NZ who want muscle recovery that works overnight or between meals. With 24 g of micellar casein per serve, it guards muscles against breakdown when you're going long without food.

Why Choose Gold Standard 100% Casein?

• 24 g of pure micellar casein per serve – delivers sustained protein release over several hours.

• Slow-digesting formula – ideal for overnight recovery or long periods between meals.

• Rich in essential amino acids – helps support muscle repair and growth.

• Low sugar and fat content – designed to align with clean, lean nutrition goals.

• High-quality brand reputation – trusted protein source for athletes and fitness enthusiasts.

How to Use

1. Mix 1 scoop (≈ 34 g) with 300-360 ml cold water, milk, or preferred beverage.

2. Use before bed or between meals when you need prolonged protein supply.

3. On non-training days, use between meals to help meet your daily protein target.
   Pro tip: For a thicker texture and slower digestion, mix with milk instead of water.

Who’s It For?

• Night-time users – to support recovery and muscle repair while you sleep.

• Those with long gaps between meals – helps maintain amino acid levels.

• Lean muscle builders – complements your efforts to maintain or build muscle.

• Fitness enthusiasts focused on recovery – minimizes muscle breakdown and aids overall growth.

FAQ

What is Gold Standard 100% Casein?
It’s a high-quality micellar casein protein powder designed to release amino acids slowly, supporting muscle recovery and maintenance in NZ.

How much protein does it deliver per scoop?
Each serving provides about 24 g of micellar casein protein.

When is the best time to take it?
Best taken before bed or during extended periods without food to maintain muscle support.

Why Buy from Sprint Fit?

100% authentic supplements.
Free NZ shipping on orders $60+.
Same-day dispatch nationwide.
Trusted by Kiwi athletes and fitness enthusiasts.
Gold Standard 100% Casein – slow-release protein for optimal muscle recovery and growth.

Available Sizes:
Container Size: 909G (2lb)
Serving Size: 1 Scoop (34g)
Servings Per Container: 29

Container Size: 1.818 KG (4lb)
Serving Size: 1 Scoop (34g)
Servings Per Container: 56

Directions:
Add 1 heaping scoop of Gold Standard 100% Casein to your shaker cup and then pour in 295mL-354mL of your preferred beverage. Cover and shake for 25-30 seconds.

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

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