Optimum Nutrition Casein Protein

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.

All orders $60 and over receive Free* Shipping Nationwide 

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

Estimated Delivery Times*:

Auckland and North Island – Overnight

However many Auckland orders will be delivered the same day depending on what time the order is placed)

South Island – Overnight (For larger parcels allow 2 business days)

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